Control method for circulation and reclamation of industrial oil, control system for circulation and reclamation of industrial oil, and production method for reclaimed industrial oil composition

Abstract

A control method for circulation and reclamation of an industrial oil and a production method for a reclaimed industrial oil composition, which are executed in a control system for circulation and reclamation of an industrial oil, include: a recovery step at which from an industrial oil use apparatus, an industrial oil composition after use is recovered; a reclamation step at which from the industrial oil composition-after use that is recovered, a reclaimed oil composition containing a base oil is reclaimed; a composition determination step at which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is determined; and a production step at which based on the composition determined at the composition determination step, the industrial oil composition after reclamation is produced by adding a functional additive to the reclaimed oil composition after reclamation.

Description

FIELD

[0001] The present invention relates to a control method for circulation and reclamation of an industrial oil, a control system for circulation and reclamation of an industrial oil, and a production method for a reclaimed industrial oil composition.BACKGROUND

[0002] Patent Literature 1 describes a waste oil reclamation treatment system to obtain a reclaimed heavy oil from a waste oil, i.e., an industrial oil composition after use. Specifically, Patent Literature 1 describes a waste oil reclamation treatment system, having a step of removing impurities from a waste oil by centrifugal separation and a step of distillation at which the waste oil having the impurities removed is heated thereby further removing impurities mixed in the waste oil by evaporation to obtain a reclaimed heavy oil. The reclaimed heavy oil obtained here is used as a fuel oil.CITATION LISTPatent LiteraturePatent Literature 1: Japanese Patent Application Laid-open No. 2003-306682SUMMARYTechnical Problem

[0004] The waste oil circulation and reclamation treatment system described in this patent has problems, for example, among other things in terms of CO2 reduction, because the industrial oil composition after use is used as a fuel oil as described above, and in addition, there is room for further improvement in terms of social implementation of the circulation and reclamation technology for said industrial oil composition.

[0005] The present invention has been made in light of the above circumstances; thus, an object of the present invention is to provide a control method for circulation and reclamation of an industrial oil, a control system for circulation and reclamation of an industrial oil, and a production method for a reclaimed industrial oil composition, with which methods and system an industrial oil composition can be properly circulated and reclaimed.Solution to Problem

[0006] To achieve the above object, a control method for circulation and reclamation of an industrial oil according to the invention includes a recovery step at which from an industrial oil use apparatus that uses an industrial oil use apparatus that uses an industrial oil composition containing a base oil and a functional additive, the industrial oil composition after use is recovered; a reclamation step at which from the industrial oil composition after the use that is recovered, a reclaimed oil composition containing the base oil is reclaimed; a composition determination step at which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use unit is determined; and a production step at which based on the composition determined at the composition determination step, the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use unit is produced by adding the functional additive to the reclaimed oil composition after reclamation, wherein at the composition determination step, in determining the composition, the industrial oil composition that is circulated and reclaimed is controlled by controlling the functional additive that is added to the reclaimed oil composition.

[0007] To achieve the above object, a control system for circulation and reclamation of an industrial oil according to the invention includes a reclamation apparatus with which a reclaimed oil composition containing a base oil is reclaimed from an industrial oil composition after use comprising the base oil and a functional additive that is recovered from an industrial oil use apparatus that uses the industrial oil composition; a composition determination apparatus with which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is determined; and a production apparatus with which based on the composition determined by the composition determination apparatus, the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is produced by adding the functional additive to the reclaimed oil composition after reclamation, wherein the composition determination apparatus controls, in determining the composition, the industrial oil composition that is circulated and reclaimed by controlling the functional additive that is added to the reclaimed oil composition.

[0008] To achieve the above object, a production method for a reclaimed industrial oil composition according to the invention includes a recovery step at which from an industrial oil use apparatus that uses an industrial oil composition containing a base oil and a functional additive, the industrial oil composition after use is recovered; a reclamation step at which from the industrial oil composition after the use that is recovered, a reclaimed oil composition containing the base oil is reclaimed; a composition determination step at which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is determined; and a production step at which based on the composition determined at the composition determination step, the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use apparatus is produced by adding the functional additive to the reclaimed oil composition after reclamation, wherein at the composition determination step, in determination of the composition, the industrial oil composition that is circulated and reclaimed is controlled by controlling the functional additive that is added to the reclaimed oil composition.Advantageous Effects of Invention

[0009] According to the control method for circulation and reclamation of the industrial oil, the control system for circulation and reclamation of the industrial oil, and the production method for a reclaimed industrial oil composition according to the present invention, it is possible to properly circulate and reclaim an industrial oil composition.BRIEF DESCRIPTION OF DRAWINGS

[0010] FIG. 1 is a block diagram illustrating the schematic configuration of the control system for circulation and reclamation of the industrial oil according to the embodiment.

[0011] FIG. 2 is a schematic diagram illustrating the composition of the industrial oil composition according to the embodiment.

[0012] FIG. 3 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0013] FIG. 4 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0014] FIG. 5 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0015] FIG. 6 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0016] FIG. 7 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0017] FIG. 8 is a line diagram illustrating one example of the analysis (liquid chromatography) of the industrial oil composition after use according to the embodiment.

[0018] FIG. 9 is a line diagram illustrating one example of the analysis (liquid chromatography) of the industrial oil composition after use according to the embodiment.

[0019] FIG. 10 is a line diagram illustrating one example of the analysis (liquid chromatography) of the industrial oil composition after use according to the embodiment.

[0020] FIG. 11 is a line diagram illustrating another example of the analysis (infrared spectroscopy) of the industrial oil composition after use according to the embodiment.

[0021] FIG. 12 is a line diagram illustrating another example of the analysis (infrared spectroscopy) of the industrial oil composition after use according to the embodiment.

[0022] FIG. 13 is a diagram illustrating one example of the flow of each step in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0023] FIG. 14 is a schematic diagram illustrating one example of the functional additive that may be selected in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0024] FIG. 15 is a diagram illustrating one example of the flow of the composition determination steps in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0025] FIG. 16 is a diagram illustrating one example of the flow of the composition determination steps in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0026] FIG. 17 is a diagram illustrating one example of the flow of the composition determination steps in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0027] FIG. 18 is a diagram illustrating one example of the flow of each step in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0028] FIG. 19 is a block diagram illustrating another example of the flow of the composition determination steps in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.DESCRIPTION OF EMBODIMENTS

[0029] Hereinafter, the embodiments according to the present invention will be described specifically on the basis of the drawings. The present invention is not limited by the embodiments described below. Also, the components in the following embodiments include those that may be easily substitutable by those skilled in the art, or those that are substantially same.Embodiment<Outline of the Control System for Circulation and Reclamation of Industrial Oil>

[0030] A control system Sys1 for circulation and reclamation of the industrial oil according to this embodiment illustrated in FIG. 1 has a production apparatus 1, an industrial oil use apparatus 2, an analysis apparatus 3, a reclamation apparatus 4, a composition determination apparatus 5, a transport carrier 6, and a storage facility 7. The control system Sys1 for circulation and reclamation of the industrial oil according to this embodiment constitutes the system that enables to properly circulate and reclaim an industrial oil composition C1 used in the industrial oil use apparatus 2 by making these units cooperate with each other.

[0031] Typically, the control system Sys1 for circulation and reclamation of the industrial oil uses in the industrial oil use apparatus 2 the industrial oil composition C1 produced by the production apparatus 1, and then recovers said industrial oil composition C1 after use and generates a reclaimed oil composition C2 by the reclamation apparatus 4. The control system Sys1 for circulation and reclamation of the industrial oil then uses this reclaimed oil composition C2 as a raw material for production of the industrial oil composition C1 again by the production apparatus 1, and then re-uses the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2 thereby circulating and reclaiming the industrial oil composition C1. In other words, this control system Sys1 for circulation and reclamation of the industrial oil constitutes a so-called horizontal circulation system for the industrial oil composition C1. In this case, with the control system Sys1 for circulation and reclamation of the industrial oil, it is possible to properly control the industrial oil composition C1 that is circulated and reclaimed by controlling in accordance with the purpose in the composition determination apparatus 5 the composition of the industrial oil composition C1 after reclamation so as to be re-used in the industrial oil use apparatus 2.

[0032] Therefore, the control system Sys1 for circulation and reclamation of the industrial oil is for social implementation of the technology for reclamation, circulation, and control of the industrial oil composition C1 as described above, thereby realizing a system that widely contributes to a society, for example, not only in terms of CO2 reduction and carbon neutrality but also in terms of the so-called SDGs (Sustainable Development Goals), the reduction of an environmental load, and the circular economy.

[0033] Hereinafter, with reference to the drawings, it will be described in detail about each composition of the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil that is executed in the control system Sys1 for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition. In the following, first the industrial oil composition C1 to be controlled in the control system Sys1 for circulation and reclamation of the industrial oil will be outlined, which is then followed by a detailed description of each component and so forth of the control system Sys1 for circulation and reclamation of the industrial oil.<Industrial Oil Composition to be Controlled>

[0034] The industrial oil composition C1 to be controlled in the control system Sys1 for circulation and reclamation of the industrial oil includes a base oil and a functional additive that is added in accordance with the use in the industrial oil use apparatus 2. The industrial oil composition C1 is produced by the production apparatus 1 and used in the industrial oil use apparatus 2. The industrial oil composition C1 having been used in the industrial oil use apparatus 2 is recovered and reclaimed into the reclaimed oil composition C2 containing the base oil by the reclamation apparatus 4, and this reclaimed oil composition C2 is used again as a raw material for the industrial oil composition C1. During this time, the industrial oil composition C1 circulates while being transported in the control system Sys1 for circulation and reclamation of the industrial oil by means of the transport carrier 6 and the like among the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4, more specifically, among the locations where these units are installed (for example, among the production plant P1, the use plant P2, and the reclamation plant P3).

[0035] The industrial oil composition C1 of this embodiment is used as a so-called machine oil in the industrial oil use apparatus 2. As one example, the industrial oil composition C1 is described here as being used for machine lubrication or metal processing in the industrial oil use apparatus 2.

[0036] In the following description, the industrial oil composition C1 before it is used in the industrial oil use apparatus 2 is sometimes simply referred to as “industrial oil composition C1 before use”. Also, the industrial oil composition C1 before it is used for machine lubrication is sometimes referred to as “industrial oil composition C1 before use for machine lubrication”, and the industrial oil composition before it is used for metal processing is sometimes referred to as “industrial oil composition C1 before use for metal processing”. Similarly, the industrial oil composition C1 after it is used in the industrial oil use apparatus 2 is sometimes referred to as simply “industrial oil composition C1 after use”. Also, the industrial oil composition C1 after it is used for machine lubrication is sometimes referred to as “industrial oil composition C1 after use for machine lubrication”, and the industrial oil composition after it is used for metal processing is sometimes referred to as “industrial oil composition C1 after use for metal processing”. Also, the industrial oil composition C1 produced from the reclaimed oil composition C2 as the raw material is sometimes referred to as simply “industrial oil composition C1 after reclamation”.

[0037] More specifically, the industrial oil composition C1 before use contains a mineral oil (A1) or a synthetic oil (A2) as the base oil.

[0038] Specifically, examples of the mineral oil (A1) includes base oils belonging to Group 1, Group 2, and Group 3 in the base oil categories defined by the American Petroleum Institute (API). Examples of the base oil belonging to Group 1 include a base oil obtained by a solvent refining method. Examples of the base oil belonging to Group 2 include a base oil obtained by a hydrotreating method. Examples of the base oil belonging to Group 3 include a base oil obtained by a hydrocracking method. Specifically, examples of the synthetic oil (A2) includes base oils belong to Group 4 and Group 5 in the base oil categories defined by the American Petroleum Institute. Examples of the base oil belonging to Group 4 include polyalphaolefins (PAO) obtained by chemical synthesis. Base oils belonging to Group 5 and others include, for example, a vegetable oil, a hydrogenated vegetable oil, and their derivatives. The base oil may be used one kind alone of those described above or in a combination of two or more of them.

[0039] The industrial oil composition C1 before use contains a neutral phosphite ester derivative and a 2,6-di-t-butylphenol derivative, as the antioxidant.

[0040] The neutral phosphite ester derivative is represented by the following formula (B). The neutral phosphite ester derivative may be used one kind alone of those described above or in a combination of two or more of them. Because the neutral phosphite ester derivative is a dimer, this is less likely to evaporate and may efficiently exhibit an antioxidant performance.

[0041] In the formula (B), Rb21 to Rb24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms.

[0042] Each of the aliphatic hydrocarbon groups of 10 to 16 carbon atoms may be a linear, a branched, or a cyclic aliphatic hydrocarbon group, and may be a saturated or an unsaturated aliphatic hydrocarbon group. Specifically, examples of the aliphatic hydrocarbon group having 10 to 16 carbon atoms that may be preferably used include linear alkyl groups, such as a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, and a hexadecyl group (cetyl group).

[0043] Rb25 to Rb28 each independently represent a linear or a branched alkyl group having 1 to 6 carbon atoms.

[0044] Examples of the linear or the branched alkyl group having 1 to 6 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an n-hexyl group, an isopropyl group, a sec-butyl group, an isobutyl group, a t-butyl group, an isopentyl group, a t-pentyl group, a neopentyl group, and an isohexyl group.

[0045] Because the neutral phosphite ester has specified substituents in Rb25 to Rb28, the wear resistance, in addition to the antioxidant performance, is excellent. The reason for this improvement is believed to be because the film of the industrial oil composition C1 attached to a sliding part is made strong by the specified substituents in Rb25 to Rb28.

[0046] Especially when Rb25 and Rb27 each are a linear alkyl group having 1 to 6 carbon atoms, preferably 1 to 3 carbon atoms, and Rb26 and Rb28 each are a branched alkyl group having 3 to 6 carbon atoms, preferably 3 to 4 carbon atoms, the effect on improvement in the wear resistance is further enhanced.

[0047] Rb291 and Rb292 each independently represent a hydrogen atom, or a linear or a branched alkyl group having 1 to 5 carbon atoms.

[0048] Examples of the linear or the branched alkyl group having 1 to 5 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an isopropyl group, a sec-butyl group, an isobutyl group, a t-butyl group, an isopentyl group, a t-pentyl group, and a neopentyl group.

[0049] However, the total number of the carbon atoms in Rb291 and Rb292 is 1 to 5. Therefore, when Rb291 is, for example, a hydrogen atom, Rb292 is a linear or a branched alkyl group having 1 to 5 carbon atoms; when Rb291 is, for example, a methyl group, Rb292 is a linear or a branched alkyl group having 1 to 4 carbon atoms; and when Rb291 is, for example, an ethyl group, Rb292 is a linear or a branched alkyl group having 2 to 3 carbon atoms.

[0050] In order to strengthen a film of the industrial oil composition C1 furthermore, it is more preferable that Rb291 is a hydrogen atom and Rb292 is a linear or a branched alkyl group having 1 to 5 carbon atoms.

[0051] The 2,6-di-t-butylphenol derivative is represented by the following formula (C). The 2,6-di-t-butylphenol derivative may be used one kind alone or in a combination of two or more kinds thereof.

[0052] In the formula (C), Rc1 represents a linear or a branched alkyl group having 1 to 12 carbon atoms. Examples of the linear or branched alkyl group having 1 to 12 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, a t-butyl group, an iso-butyl group, an n-pentyl group, an iso-pentyl group, a t-pentyl group, a neopentyl group, a hexyl group, a heptyl group, an iso-heptyl group, an n-octyl group, an iso-octyl group, a 2-ethylhexyl group, a nonyl group, and a decyl group. The alkyl groups described above improve the compatibility of the 2,6-di-t-butylphenol derivative.

[0053] In the industrial oil composition C1 before use, it is preferable that the neutral phosphite ester derivative is contained in an amount of 0.001 parts by mass or more and 6 parts by mass or less, relative to 100 parts by mass of the base oil. It is preferable that the 2,6-di-t-butylphenol derivative is contained in an amount of 0.001 parts by mass or more and 6 parts by mass or less, relative to 100 parts by mass of the base oil. When the antioxidant is contained in the amount described above, the antioxidant performance may be sustained for a long period of time.

[0054] Further, it is preferable that the industrial oil composition C1 before use further contains a hindered amine compound as the antioxidant.

[0055] The hindered amine compound is represented by the following formula (D). The hindered amine compound may be used one kind alone or in a combination of two or more kinds thereof.

[0056] Rd21 and Rd22 each independently represent an aliphatic hydrocarbon group having 1 to 10 carbon atoms.

[0057] Each of the aliphatic hydrocarbon groups having 1 to 10 carbon atoms may be a linear, a branched, or a cyclic aliphatic hydrocarbon group, and may be a saturated or an unsaturated aliphatic hydrocarbon group.

[0058] Specifically, examples of the aliphatic hydrocarbon group having 1 to 10 carbon atoms that may be preferably used include linear and branched alkyl groups, such as a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an n-hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an isopropyl group, a sec-butyl group, an isobutyl group, a t-butyl group, an isopentyl group, a t-pentyl group, a neopentyl group, an isohexyl group, and a 2-ethylhexyl group. Among these, linear and branched alkyl groups having 5 to 10 carbon atoms are more preferable from the viewpoint of enhanced durability.

[0059] Rd23 represents a divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms.

[0060] Examples of the divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms that may be preferably used include divalent linear and branched alkylene groups, such as a methylene group, a 1, 2-ethylene group, a 1, 3-propylene group, a 1, 4-butylene group, a 1, 5-pentylene group, a 1, 6-hexylene group, a 1, 7-heptylene group, a 1, 8-octylene group, a 1,9-nonylene group, a 1, 10-decylene group, and a 3-methyl-1,5-pentylene group. Among these, a divalent linear alkylene group or a branched alkylene group, having 5 to 10 carbon atoms, is more preferable from the viewpoint of enhanced durability.

[0061] Among the above groups, from the viewpoint of enhanced durability at a high temperature, the groups in which the total number of carbon atoms of Rd21, Rd22, and Rd23 is 16 to 30 are more preferable.

[0062] When the hindered amine compound is used in the industrial oil composition C1 before use, it is preferable that this is contained in an amount of 0.002 parts by mass or more and 5 parts by mass or less, relative to 100 parts by mass of the base oil.

[0063] Because the industrial oil composition C1 before use is used for machine lubrication or for metal processing, this further contains a functional additive. When the industrial oil composition C1 before use is used for machine lubrication, it is preferable to contain, along with the base oil and the antioxidants, an additional functional additive such as an oleaginous agent or a metal deactivator.

[0064] The oleaginous agent contained in the industrial oil composition C1 before use for machine lubrication may be a sulfur compound. For example, a zinc dialkyl dithiophosphate may be a good choice as the oleaginous agent. The presence of the zinc dialkyl dithiophosphate in the industrial oil composition C1 before use for machine lubrication improves a sliding property thereby preventing wearing even when used at a high temperature. As for the metal deactivator that is contained in the industrial oil composition C1 before use for machine lubrication, a benzotriazole derivative may be suitably used. The presence of the benzotriazole derivative in the industrial oil composition C1 before use for machine lubrication may protect a metal surface thereby preventing corrosion even when used at a high temperature. In the industrial oil composition C1 before use for machine lubrication, a combination of the oleaginous agent and the metal deactivator may lubricate a machine for a longer period of time.

[0065] Examples of the alkyl group possessed by the zinc dialkyl dithiophosphate include a primary alkyl group and a secondary alkyl group. Both the primary and secondary alkyl groups may be present in one molecule. The alkyl group may be linear or branched. There is no particular restriction in the number of carbon atoms in the alkyl group, but from the viewpoint of preventing wearing, the number of carbon atoms is preferably 3 to 12, and more preferably 3 to 8. The zinc dialkyl dithiophosphate may be used one kind alone or in a combination of two or more kinds thereof.

[0066] The benzotriazole derivative is preferably represented by the following formula (E). When the benzotriazole derivative like this is contained, corrosion may be further prevented even when used at a high temperature.

[0067] In the formula (E), Rc1 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and Re2 and Re3 each independently represent an alkyl group having 1 to 18 carbon atoms. The benzotriazole derivative may be used one kind alone or in a combination of two or more kinds thereof.

[0068] In the industrial oil composition C1 before use for machine lubrication, it is preferable that the oleaginous agent is contained in an amount of 0.1 parts by mass or more and 5 parts by mass or less, relative to 100 parts by mass of the base oil. In the industrial oil composition before use for machine lubrication, it is preferable that the metal deactivator is contained in an amount of 0.01 parts by mass or more and 5 parts by mass or less, relative to 100 parts by mass of the base oil.

[0069] When the industrial oil composition C1 before use is used for metal processing, it is preferable to further contain, along with the base oil and the antioxidant, additional functional additives such as an extreme-pressure agent and a metal deactivator.

[0070] For example, as for the extreme-pressure agent that is contained in the industrial oil composition C1 before use for metal processing, a sulfur compound may be suitably used. Specifically, an example thereof is an active sulfur compound. The presence of the active sulfur compound in the industrial oil composition C1 before use for metal processing may improve processability even when used at a high temperature. As for the metal deactivator that is contained in the industrial oil composition C1 before use for metal processing, for example, a thiadiazole derivative may be suitably used. The presence of the thiadiazole derivative in the industrial oil composition before use for metal processing may protect a metal surface thereby preventing corrosion even when used at a high temperature. It also enables processing of a copper-based metal. In the industrial oil composition C1 before use for metal processing, a combination of the extreme-pressure agent and the metal deactivator allows metal processing for a longer period of time.

[0071] The active sulfur compound may be any compound as far as it contains an active sulfur in its molecule. The active sulfur compound refers to, for example, of the compounds containing a sulfur atom but no metal atom nor phosphorus atom, a compound exhibiting the copper plate corrosion of 2 to 4, as measured by the test method according to JIS K2513 (Petroleum Products-Corrosiveness to copper-Copper strip test; test tube method with heating at 100° C. for 1 hour), in which the compound diluted with a purified mineral oil to make a sulfur content of 1% by mass is tested. On the other hand, of the compounds that contain a sulfur atom but no metal atom nor phosphorus atom, a compound exhibiting the copper plate corrosion of 1 according to the above-mentioned test method is referred to as an inactive sulfur compound. Examples of the active sulfur compound include a polysulfide, a sulfide oil and fat, a powdered sulfur, a sulfide mineral oil, a sulfide ester, and a sulfide olefin. Among these, a sulfide olefin is preferably used. The active sulfur compound may be used one kind alone, or in a combination of two or more kinds thereof. There are compounds that may be inactive sulfur compounds depending on the production condition and other factors, even if raw materials and a sulfur content are similar to those of active sulfur compounds.

[0072] The thiadiazole derivative is preferably a 2,5-bis(alkyldithio)-1,3,4-thiadiazole, represented by the following formula (F). The presence of the thiadiazole derivative as described above provides a greater protection against the corrosion even when used at a high temperature.

[0073] In the above formula (F), Rf1 and Rf2 each independently represent an alkyl group having 1 to 20 carbon atoms, and a and b each independently represent 1, 2 or 3. The thiadiazole derivative may be used one kind alone, or in a combination of two or more kinds thereof.

[0074] In the industrial oil composition C1 before use for metal processing, it is preferable that the extreme-pressure agent is contained in an amount of 0.01 parts by mass or more and 10 parts by mass or less, relative to 100 parts by mass of the base oil. In the industrial oil composition C1 before use for metal processing, it is preferable that the metal deactivator is contained in an amount of 0.01 parts by mass or more and 10 parts by mass or less, relative to 100 parts by mass of the base oil.

[0075] When the industrial oil composition C1 before use for metal processing does not contain the metal deactivator, it may be suitably used for processing of a metal other than a copper-based metal, for example, an iron-containing metal. When the industrial oil composition C1 before use for metal processing does not contain the metal deactivator, the inactive sulfur compound may be used in place of the active sulfur compound, as the extreme-pressure agent.

[0076] The industrial oil composition C1 before use may further contain other functional additive. Examples of the other functional additive include a chlorinated paraffin.

[0077] It is preferable that the other functional additive is contained to the extent that it does not impair the long-term use effect of the industrial oil composition C1 before use.

[0078] The kinematic viscosity (JIS K 2283) at 40° C. of the industrial oil composition C1 before use for machine lubrication is preferably 15 cSt or more and 100 cSt or less, and more preferably 32 cSt or more and 68 cSt or less. Also, the kinematic viscosity (JIS K 2283) at 40° C. of the industrial oil composition C1 before use for metal processing is preferably 2 cSt or more and 40 cSt or less. In particular, the kinematic viscosity (JIS K 2283) at 40° C. of the industrial oil composition C1 before use for cutting processing is more preferably 10 cSt or more and 40 cSt or less.

[0079] When the industrial oil composition C1 before use is for machine lubrication, this may be used, with a publicly known method, as an oil such as a turbine oil, a hydraulic oil, a bearing oil, a gear oil, a compressor oil, or a traction oil. When the industrial oil composition C1 before use is for metal processing, this may be used, with a publicly known method, as an oil such as a cutting oil, a rolling oil, a pressed and drawing oil, a cleaning oil, a plastic processing oil, a punching oil, a heat treatment oil, or a thermal media oil. When used in the ways as described above, the industrial oil composition C1 before use will become the industrial oil composition C1 that has been used for machine lubrication or for metal processing.

[0080] The industrial oil composition C1 after use may be mixed with a flushing oil, which is used when replacing the industrial oil composition C1 that has been used for machine lubrication. Here, it is preferable that the flushing oil contains the base oil and antioxidant as described before.

[0081] In the industrial oil composition C1 after use, it is believed that most of the functional additives are usually consumed, as described in FIG. 2, for example. In addition, the industrial oil composition C1 after use usually contains altered components of the functional additive, the base oil, and the antioxidant, which have lost their functions due to degradation and compounding, among others, during the use thereof. In addition, the industrial oil composition C1 after use usually contains impurities such as metals, debris, and other solid components that have been formed and mixed during the use thereof. The industrial oil composition C1 after use is often colored in brown or other colors due to the presence of the altered components and impurities. In other words, the industrial oil composition C1 after use contains less functional additives than the industrial oil composition C1 before use in the industrial oil use apparatus 2. On the other hand, the industrial oil composition C1 after use usually contains also the base oil, the antioxidant, and the functional additives that remain in the same state as before use. The reason why the base oil and antioxidant are possible to remain at a high percentage in the industrial oil composition C1 after use is that the antioxidant itself has a high stability, and also that the antioxidant suppresses the alteration of the base oil.<Reclamation of the Reclaimed Oil Composition>

[0082] In the control system Sys1 for circulation and reclamation of the industrial oil in this embodiment, the reclaimed oil composition C2 containing the base oil is reclaimed from the industrial oil composition C1 after use by a refining step at which the industrial oil composition C1 after use as described above is refined (in other words, the reclaimed oil composition C2 is produced).<Reclamation of the Reclaimed Oil Composition: Reclamation Specific Example 1>

[0083] In this control system Sys1 for circulation and reclamation of the industrial oil, for example, an adsorption treatment may be performed as the refining process. In the specific example 1, the refining process, i.e., the adsorption treatment, is performed on the above-mentioned industrial oil composition C1 after use for machine lubrication or for metal processing at the refining step.

[0084] Examples of the adsorbent used for the adsorption treatment include an acidic white clay, an activated white clay, and a silica-magnesia type formulation. The acidic white clay is a clay composed of a clay mineral belonging to the montmorillonite group having a silica-alumina-silica trilayer structure and a soluble silicic acid as the main components. The activated white clay is obtained by treating a naturally occurring acidic white clay (montmorillonite clay) with a mineral acid such as sulfuric acid, and is a compound having a porous structure that has a large specific surface area and a high adsorption capacity. The activated white clay is preferably in a particulate form. The particle diameter of the activated white clay is preferably 0.1 μm or more and 100 μm or less, more preferably 10 μm or more and 50 μm or less, for example. The particle diameter of the activated white clay is the median diameter measured on a volume basis, using a laser diffraction and scattering method. The specific surface area of the activated white clay is preferably 1 m2 / g or more and 500 m2 / g or less, more preferably 50 m2 / g or more and 350 m2 / g or less. The specific surface area of the activated white clay is the value measured by the BET method. The silica-magnesia formulation contains a silica component and a magnesia component. In the silica-magnesia formulation, a magnesia component layer is sandwiched between silica component layers to form a tri-layered portion, which is encompassed by a matrix phase that is composed of silica particulates. It is possible that the adsorbent selectively adsorbs a substance having a polar group. From the viewpoint of a removal power of, among others, the altered components and impurities, the activated white clay and the silica-magnesia formulation are preferably used. The silica-magnesia formulation is more preferable because the use amount thereof may be lowered due to its high removal power of the altered components and impurities, among others. The adsorbent may be used one kind alone or in a combination of two or more kinds thereof.

[0085] At the time of the adsorption treatment, the industrial oil composition C1 after use is brought into contact with the adsorbent. With this, the adsorbent adsorbs the altered components and impurities contained in the industrial oil composition C1 after use, so that the altered components and impurities may be removed. Therefore, the degree of coloration is reduced in the reclaimed oil composition C2 obtained by the adsorbent treatment. It is believed that the adsorbent removes some of the impurities (sulfur-containing component) originally contained in the base oil, as well as the altered components that are formed from these impurities by use.

[0086] Specifically, in the adsorption treatment, the adsorbent is first added to the industrial oil composition C1 after use to obtain a mixture. In order to suitably remove the altered components and impurities, it is preferable that the adsorbent is allowed to be contacted in an amount of 10 parts by mass or more, more preferably in an amount of 10 parts by mass or more and 100 parts by mass or less, relative to 100 parts by mass of the industrial oil composition after use.

[0087] The resulting mixture is then stirred. Examples of the stirring method include stirring with a stirrer, with a propeller stirrer, with a planetary stirrer by revolving and orbiting, with stirring using a stirring rod, and with a continuous stirrer by flowing through a tube that induces stirring. The stirring time is sufficient as far as the conditions for the contact between the adsorbent and the industrial oil composition C1 after use in the mixture are fully satisfied, and thus it is preferably 5 minutes or longer. Stirring is conducted preferably at room temperature (e.g., 15° C.) or higher, more preferably 80° C. or higher and 130° C. or lower. When the temperature at which the stirring is conducted is too low, the viscosity may be too high, resulting in reduction of the stirring efficiency. On the other hand, when the temperature at which the stirring is conducted is too high, the functional additive may be thermally decomposed to form new altered components.

[0088] Finally, solid components including the adsorbent that adsorbed the altered components and impurities are separated and removed from the mixture to obtain the reclaimed oil composition C2. Examples of the separation and removal method include a centrifugation and a filtration by a filter. There is no particular restriction in the condition of the centrifugal separation and in the filter aperture, as long as the solid components can be separated and removed. The filter aperture is preferably 4 μm or less, for example. In the case of the centrifugal filtration, any conditions are sufficient as long as the solid components may be settled so that they may be separated from the supernatant (liquid) portion.

[0089] The adsorption treatment described above may be conducted multiple times. In this case, it is preferable that the total amount of the adsorbent used in multiple times is 10 parts by mass or more, and it is more preferable that the total amount is 10 parts by mass or more and 100 parts by mass or less, relative to 100 parts by mass of the industrial oil composition after use. The adsorbent having been used in the adsorption treatment may be utilized in cement production as a heat source and as a bulking material.

[0090] This adsorption treatment allows removal of most of the altered components and impurities, as well as the antioxidant and the functional additives that remain in the same state as before use. Therefore, the reclaimed oil composition C2 thereby obtained is believed to be mostly composed of the base oil that remains in the same state as the industrial oil composition C1 before use.

[0091] In the specific example 1, when the functional additive used in the industrial oil composition C1 before use contains sulfur (specifically, when a sulfur-containing compound is used as the functional additive), it is preferable to further include a step of measuring the amount of the sulfur in the industrial oil composition C1 after use. Here, the amount of the sulfur may be measured specifically by the ICP analysis method. Usually, it is considered that the amount of the sulfur that is measured at the step of measuring the amount of sulfur includes a sulfur compound, altered components thereof, and components derived from the base oil.

[0092] This step of measuring the amount of sulfur is followed by the refining step described above. Specifically, in the adsorption treatment at the refining step, it is preferable to use the adsorbent in an amount of 10 parts by mass or more and 100 parts by mass or less, more preferably 30 parts by mass or more and 90 parts by mass or less, relative to 100 parts by mass of the amount of the sulfur obtained at the step of measuring the amount of sulfur. When the adsorption treatment is conducted multiple times, it is preferable that the total amount of the adsorbent used multiple times is the above-mentioned amount. When the adsorbent is used in the above-mentioned amount, a sulfur compound and altered components thereof, as well as the antioxidant and functional additive that remain in the same state as before use along with the altered components thereof may be properly removed.

[0093] Next, it is preferable to conduct a step of confirming that the sulfur has been removed by measuring the amount of the sulfur in the reclaimed oil composition C2 obtained at the refining step. The extent to which the amount of sulfur has been reduced after the refining step may also be confirmed by measuring the amount of sulfur in the same manner as described above. The amount of the sulfur measured at the step of confirming the amount of sulfur is believed to be derived from the base oil, because usually the sulfur compound and the altered components thereof have already been removed.

[0094] As described above, according to the specific example 1, the above-mentioned reclaimed oil composition C2 may be obtained. The reason for this is considered that the industrial oil composition C1 before use contains, as the antioxidant, at least the neutral phosphite ester derivative and the 2,6-di-t-butylphenol derivative. In other words, the above-mentioned antioxidants allow the base oil to remain at a high percentage even when used for machine lubrication or for metal processing. When the hindered amine compound is included as the antioxidant, it is possible to further suppress the alteration of the base oil even when used for machine lubrication or for metal processing. Due to their high stability, these antioxidants remain at a high percentage when used for machine lubrication or for metal processing. Therefore, when these altered components and impurities, along with the antioxidant and functional additive that remain in the same state as before use, are removed by the adsorption treatment, the reclaimed oil composition C2 is obtained that is largely composed of the base oil that remains in the same state as the industrial oil composition C1 before use (note that the reclaimed oil composition C2 also contains a trace amount of adsorbent that failed to be fully separated). Because the base oil in the reclaimed oil composition C2 is the same as the base oil in the industrial oil composition C1 before use, this may also be used in the production of the industrial oil composition C1 after reclamation as it is. The reclaimed oil composition C2 when used in the production of the industrial oil composition C1 after reclamation may be used with the addition of the base oil as a new oil, or the reclaimed oil compositions C2 may be mixed with each other for use. Therefore, according to the specific example 1, the reclaimed oil composition C2 may be used for the industrial oil composition C1 after reclamation for machine lubrication or for metal processing in the industrial oil use apparatus 2, rather than as the reclaimed industrial oil composition for fuel like in the past; thus, this contributes to the reduction of CO2 and to the carbon neutrality.

[0095] The conventional reclaimed oil composition is, even if it is reclaimed, often used as a fuel oil due to much alteration of the industrial oil composition after use, as described in Patent Literature 1. In addition, when using the conventional reclaimed oil composition, a large amount of new base oil needs to be mixed in order to achieve the desired performance. Thus, there is a problem that the conventional reclamation process to obtain the reclaimed oil composition fails to contribute to the reduction of CO2 relatively.<Reclamation of the Reclaimed Oil Composition: Reclamation Specific Example 2>

[0096] As another example, in this control system Sys1 for circulation and reclamation of the industrial oil, the refining process may have a distillation process under reduced pressure after the adsorption process. Thus, the specific example 2 differs from the specific example 1 in that the adsorption process is followed by the distillation process under reduced pressure to reclaim (produce) the reclaimed oil composition C2. Hereinafter, the items that differ from the specific example 1 will be described. The same items as those in the specific example 1 will be omitted from the description of the specific example 2.

[0097] In the specific example 2, the distillation under reduced pressure is conducted on the industrial oil composition C1 after use that have undergone the adsorption process (the industrial oil composition C1 after the adsorption treatment). It is preferable that the distillation under reduced pressure is conducted at a reduced pressure of 24 mmHg or less, and a heating temperature of 230° C. or higher and 280° C. or lower. For example, when the distillation under reduced pressure is conducted at 24 mmHg, the base oil whose kinematic viscosity (JIS K 2283) at 40° C. is 10 cSt or more and 80 cst or less boils around at 240° C.; thus, this base oil may be distilled. The specific example 2 has the advantage in that it is possible to further remove the altered components and impurities that remains in the industrial oil composition C1 after the adsorption treatment by the distillation under reduced pressure. In the reclaimed oil composition C2 obtained through the adsorption and distillation under reduced pressure as described above, a further larger portion is considered to be composed of the base oil that remains in the same state as the industrial oil composition C1 before use (note that the reclaimed oil composition C2 also contains a trace amount of adsorbent that has not been fully separated).

[0098] In addition, by controlling the heating temperature during the distillation under reduced pressure, it is possible to separately obtain the reclaimed oil compositions C2 that contain a plurality of the base oils having different kinematic viscosity ranges at 40° C. (JIS K 2283).

[0099] In the specific example 2, it may be allowed to conduct, as the refining step, the adsorption treatment, then followed by adding the antioxidant to the industrial oil composition C1 thus treated with the adsorbent, then further followed by the distillation under reduced pressure. The industrial oil composition C1 treated with the adsorbent is composed mostly of the base oil that remains in the same state as the industrial oil composition C1 before use. The addition of the antioxidant allows enhancement of the stability of the base oil. When the industrial oil composition after the adsorption treatment to which the antioxidant is added is subjected to the distillation under reduced pressure, the alteration of the base oil may be properly suppressed even when heated during the distillation under reduced pressure. Especially, during the time of distillation under reduced pressure, it is possible to suppress the alteration of the base oil that boils even at high temperature (e.g., 240° C. or higher, preferably 260° C. or higher and 280° C. or lower).

[0100] As described above, according to the specific example 2, the reclaimed oil composition C2 as described above may be obtained. As in the case of the specific example 1, the reclaimed oil composition C2 obtained in the specific example 2 may be used in the industrial oil composition C1 after reclamation for machine lubrication or for metal processing in the industrial oil use apparatus 2, rather than for a fuel oil like in the past; thus, this contributes to the reduction of CO2.<Reclamation of the Reclaimed Oil Composition: Reclamation Specific Example 3>

[0101] In other example, in the control system Sys1 for circulation and reclamation of the industrial oil, as the refining step, a hydrodesulfurization may be conducted, or a hydrodesulfurization and a distillation under reduced pressure may be conducted successively. Therefore, the specific example 3 differs from the specific examples 1 and 2 in that in place of the adsorption treatment, a hydrodesulfurization is conducted to reclaim (produce) the reclaimed oil composition C2. Hereinafter, the items that differ from the specific example 1 and the specific example 2 will be described. In the specific example 3, the same items as those in the specific example 1 and the specific example 2 will be omitted from the description.

[0102] The hydrodesulfurization is conducted under a high temperature and a high pressure using a hydrodesulfurization catalyst. This allows removal of the altered components and impurities in the industrial oil composition C1 after use, along with the antioxidant and functional additives that remain in the same state as before use. Therefore, the degree of coloration is decreased in the reclaimed oil composition C2 obtained by the hydrodesulfurization. By the hydrodesulfurization, it is possible to remove especially sulfur compounds that remain in the same state as in the industrial oil composition C1 after use and the altered components thereof. It is considered that most of the reclaimed oil composition C2 that is obtained by the hydrodesulfurization is composed of the base oil that remains in the same state as the industrial oil composition C1 before use.

[0103] In addition, the industrial oil composition C1 after hydrodesulfurization may be subjected to the distillation under reduced pressure. The distillation under reduced pressure has the merit that this allows further removal of the altered components and impurities that remain in the industrial oil composition after the hydrodesulfurization. It is considered that the reclaimed oil composition C2 obtained through the hydrodesulfurization and distillation under reduced pressure as described above is even further mostly composed of the base oil that remains in the same state as the industrial oil composition C1 before use.

[0104] As described above, according to the specific example 3, the reclaimed oil composition C2 as described above may be obtained. As in the cases of the specific example 1 and the specific example 2, the reclaimed oil composition C2 obtained in the specific example 3 may be used in the industrial oil composition C1 after reclamation for machine lubrication or for metal processing in the industrial oil use apparatus 2, rather than for a fuel oil like in the past; thus, this contributes to the reduction of CO2 and to the carbon neutrality.<Reclamation of the Reclaimed Oil Composition: Reclamation Specific Example 4>

[0105] As another example, in this control system Sys1 for circulation and reclamation of the industrial oil, a distillation process under reduced pressure may be conducted as the refining process. Thus, the specific example 4 differs from the specific example 1 in that the reclaimed oil composition C2 is reclaimed (produced) by using the distillation under reduced pressure in place of the adsorption treatment. Hereinafter, the items that differ from the specific example 1 will be described. The same items as those in the specific example 1 will be omitted from the description of the specific example 4.

[0106] It is preferable to conduct the distillation under reduced pressure, as in the case of the specific example 2, at a reduced pressure of 24 mmHg or less, and a heating temperature of 230° C. or higher and 280° C. or lower. For example, when the distillation under reduced pressure is conducted at 24 mmHg, the base oil whose kinematic viscosity (JIS K 2283) at 40° C. is 10 cSt or more and 80 cst or less boils around at 240° C.; thus, this base oil may be distilled. This allows reduction in the altered components and impurities in the industrial oil composition C1 after use, along with the antioxidant and the functional additive that remain in the same state as before use. Therefore, the degree of coloration is reduced in the reclaimed oil composition C2 obtained by the distillation under reduced pressure. It is considered that most of the reclaimed oil composition C2 that is obtained by the distillation under reduced pressure is composed of the base oil that remains in the same state as the industrial oil composition C1 before use.

[0107] Note that, because the industrial oil composition C1 after use contains the antioxidant that remains in the same state as before use, it is possible to suppress the alteration of the base oil even by heating during the distillation under reduced pressure. Especially, during the time of distillation under reduced pressure, it is possible to suppress the alteration of the base oil that boils even at high temperature (e.g., 240° C. or higher, preferably 260° C. or higher and 280° C. or lower). It is also allowed to conduct the distillation under reduced pressure after adding the antioxidant to the industrial oil composition C1 after use. By so doing, it is possible to further suppress the alteration of the base oil even when heated during the distillation under reduced pressure.

[0108] In addition, by controlling the heating temperature during the distillation under reduced pressure in the same way as the specific example 2, it is possible to separately obtain the reclaimed oil composition C2 that contains a plurality of the base oils having different kinematic viscosity ranges at 40° C. (JIS K 2283).

[0109] As described above, according to the specific example 4, the reclaimed oil composition C2 as described above may be obtained. As in the case of the specific example 1, the reclaimed oil composition C2 obtained in the specific example 4 may be used in the industrial oil composition C1 after reclamation for machine lubrication or for metal processing in the industrial oil use apparatus 2, rather than for a fuel oil like in the past; thus, this contributes to the CO2 reduction and to the carbon neutrality.<Supplemental Information on the Reclamation of the Reclaimed Oil Composition>

[0110] When reclaiming (producing) the reclaimed oil composition C2 from the industrial oil composition C1 after use, the method may be chosen from the production methods of the specific example 1 to the specific example 4, considering whether or not the functional additive used in the industrial oil composition C1 before use includes a sulfur compound. Specifically, in the case that the sulfur compound is not included, any of the production methods according to the specific example 1 to the specific example 4 may be used. Also, in the case that the sulfur compound whose decomposition temperature is 260° C. or higher is included, any of the production methods according to the specific example 1 to the specific example 4 may be used. On the other hand, in the case that the sulfur compound whose decomposition temperature is lower than 260° C. is included, it is preferable to use any of the production methods according to the specific example 1 to the specific example 3. In the case that the sulfur compound whose decomposition temperature is lower than 260° C. is included, when the distillation under reduced pressure is conducted first as in the case of the specific example 4, the inside of the equipment used for the distillation under reduced pressure may be blackened due to the sulfur compound.

[0111] In the reclamation (production) methods according to the specific example 1 to the specific example 4, in place of the industrial oil composition C1 after use, a defective product obtained during production of the industrial oil composition C1 or a defective stocked product may be used in the refining process. By so doing, the defective product or the defective stocked product may be re-used.<Production of the Industrial Oil Composition after Reclamation>

[0112] In the control system Sys1 for circulation and reclamation of the industrial oil in this embodiment, the reclaimed oil composition C2 obtained as described above is used as the raw material to produce the industrial oil composition C1 after reclamation for re-use in the industrial oil use apparatus 2.<Production of the Industrial Oil Composition after Reclamation: Specific Example of Production>

[0113] As one example, in this control system Sys1 for circulation and reclamation of the industrial oil, the production process of the industrial oil composition C1 after reclamation includes an addition step at which the above-mentioned antioxidant and the above-mentioned functional additive are added to the reclaimed oil composition C2 after reclamation obtained by the above reclamation method. By so doing, the industrial oil composition C1 after reclamation is produced. Specifically, the antioxidants are the neutral phosphite ester derivative represented by the aforementioned formula (B) and the 2,6-di-t-butylphenol derivative represented by the aforementioned formula (C). It is also preferable to use a hindered amine compound represented by the aforementioned formula (D). It is also preferable to add to the reclaimed oil composition C2 obtained by the methods described above the antioxidants and the functional additive with an aforementioned amount in the industrial oil composition C1 after reclamation. This makes the oil composition suitable for use in machine lubrication or in metal processing.

[0114] In addition, to the industrial oil composition C1 after reclamation having the antioxidants and functional additive added therein, the base oil described above may be added as a new oil, or other reclaimed oil composition C2 may be added. Alternatively, the step of adding the additive may be conducted after adding the base oil as the new oil to the reclaimed oil composition C2, or after mixing the reclaimed oil compositions C2 with each other. By so doing, the viscosity of the industrial oil composition C1 after reclamation may be controlled.

[0115] When the above-mentioned refining step is conducted on the industrial oil composition C1 after reclamation and after use, the reclaimed oil composition C2 may be newly obtained, too. When this is followed by the step of adding the additive described above, the industrial oil composition C1 after reclamation may be newly obtained, too. Thus, it is possible to repeat the cycle of the use and the refining, so that this contributes further to the reduction of CO2 and to the carbon neutrality.<Service Life of the Industrial Oil Composition>

[0116] The service life (in other words, life span) of the industrial oil composition C1 as described above, which may be used in the industrial oil use apparatus 2, varies depending on the functional additive that is added in accordance with the intended use, among other conditions. More specifically, the industrial oil composition C1 has a different service life usable in the industrial oil use apparatus 2 depending on the strength of the functional additive that is added and the addition amount thereof.

[0117] Here, the strength of the functional additive is an indicator corresponding to the pressure resistance and the like of the functional additive itself, typically representing the difficulty for the functional additive itself to be consumed. The strength of the functional additive varies, for example, depending on the type of functional additives, even if they provide the same functionality. The functional additive with a relatively higher (stronger) strength tends to be relatively more pressure-resistant and relatively less consumable, while the functional additive with a relatively lower (weaker) strength tends to be relatively less pressure-resistant and relatively more consumable. And the industrial oil composition C1 tends to have a relatively longer service life when the strength of the functional additive added is relatively higher, and a relatively shorter service life when the strength of the functional additive added is relatively lower.

[0118] On the other hand, the amount of the functional additive added is the amount of said functional additive added to the composition containing the base oil when producing the industrial oil composition C1. The industrial oil composition C1 tends to have a relatively longer service life when the amount of the functional additive added is relatively larger, and a relatively shorter service life when the amount of the functional additive added is relatively smaller.

[0119] In other words, the industrial oil composition C1 may have a variable service life usable in the industrial oil use apparatus 2 by controlling the functional additive to be added. In other words, the serviceable life of the industrial oil composition C1 usable in the industrial oil use apparatus 2 may be controlled by controlling the strength or the amount of the functional additive to be added.<State of the Industrial Oil Composition after Use>

[0120] Conversely, it can be said that the amount of the functional additive remaining in the industrial oil composition C1 after use in the pre-use state without being consumed or decomposed in the industrial oil composition C1 after use after passage of a predetermined use period assumed in advance in the industrial oil use apparatus 2 varies depending on the strength and amount of functional additive added to the industrial oil composition C1.

[0121] FIGS. 3, 4, 5, 6, and 7 are schematic diagrams illustrating examples of the industrial oil composition C1 after use after passage of a predetermined use period in the industrial oil use apparatus 2.

[0122] In the industrial oil composition C1 after use that is illustrated in FIG. 3, the added functional additive is almost completely decomposed and consumed, resulting in the state that the content rate thereof is almost zero with containing relatively large amount of impurity components including the wear debris originated from the industrial oil use apparatus 2. Impurity components including wear debris in the industrial oil composition C1 after use tend to increase relatively more as the use period in the industrial oil use apparatus 2 is relatively longer. The industrial oil composition C1 after use typically reaches the state illustrated in FIG. 3 when the actual use period in the industrial oil use apparatus 2 is excessively longer relative to the service life determined by the strength and amount of the functional additive added. In other words, this means that the industrial oil composition C1 after use illustrated in FIG. 3 has had too little functional additive added relative to the expected use period, or has had a relatively too low strength and thereby a relatively too short service life, and thus, this is typically in a state of excessive use in the industrial oil use apparatus 2, that is, in the state in which the base oil may be damaged if the use thereof is continued further. In this respect, the industrial oil composition C1 after use illustrated in FIG. 3 can be input to be in the state that the addition amount of the functional additive or the strength of the oil needs to be increased to prevent damage to the base oil and to increase the service life relative to the expected use period.

[0123] In the industrial oil composition C1 after use illustrated in FIG. 4, the functional additive added is almost completely decomposed and consumed, and the content rate thereof is almost zero; when comparing to the state illustrated in FIG. 3, this is the state that the impurity components including wear debris derived from the industrial oil use apparatus 2 is relatively smaller. The industrial oil composition C1 after use is typically in the state illustrated in FIG. 4 when the actual use period in the industrial oil use apparatus 2 is approximately equal to the service life determined by the strength and amount of the functional additive added, or when the actual use period is slightly longer than the said service life. The industrial oil composition C1 after use illustrated in FIG. 4 is typically in a nearly proper state for a long service life, but it is a state with some room for improvement because the functional additive content is nearly zero, which may damage the base oil if the use thereof is continued further. In this respect, the industrial oil composition C1 after use illustrated in FIG. 4 can also be said that it is in the state that there is room to slightly increase the amount of the functional additive added or slightly increase the strength so as to slightly increase the service life relative to the expected use period in order to further ensure the reliability for prevention of the base oil damage.

[0124] The industrial oil composition C1 after use illustrated in FIG. 5 is in the state that some of the functional additive added remains unconsumed, and it contains the same amount of impurity components including wear debris originated from the industrial oil use apparatus 2 as in FIG. 4. The industrial oil composition C1 after use is typically in the state illustrated in FIG. 5 when the actual use period in the industrial oil use apparatus 2 is slightly shorter than the service life determined by the strength and amount of the functional additive added. The industrial oil composition C1 after use illustrated in FIG. 5 is typically in the balanced standard state with no risk of the base oil damage, although some of the functional additive remains unconsumed.

[0125] The industrial oil composition C1 after use illustrated in FIG. 6 is in the state that it contains relatively more functional additive that remains unconsumed compared to the state in FIG. 5, and the same amount of impurity components including wear debris originated from the industrial oil use apparatus 2 as in FIG. 5. The industrial oil composition C1 after use is typically in the state illustrated in FIG. 6 when the actual use period in the industrial oil use apparatus 2 is relatively shorter compared to the service life determined by the strength and amount of functional additive added. The industrial oil composition C1 after use illustrated in FIG. 6 is typically in the state that there is no risk of damage to the base oil, but there is more functional additive remaining unconsumed than in the standard state in FIG. 5, and thus, it is in the state in which there is some room for improvement relative to the standard state. In this respect, the industrial oil composition C1 after use illustrated in FIG. 6 can also be said that it is in the state that there is a room to slightly reduce the amount of the functional additive added or slightly lower the strength of the functional additive so as to slightly shorten the service life relative to the expected use period in order to reduce more the functional additive that is wasted without being consumed.

[0126] The industrial oil composition C1 after use illustrated in FIG. 7 is in the state that most of the functional additive added remains unconsumed, and it also contains relatively large amounts of impurity components including wear debris originated from the industrial oil use apparatus 2. The industrial oil composition C1 after use typically has an excessively long service life determined by the strength and amount of the functional additive added relative to the actual use period in the industrial oil use apparatus 2; in other words, the functional additive remains almost unconsumed even after a relatively long use period in the industrial oil use apparatus 2, which is the situation illustrated in FIG. 7. This means that the industrial oil composition C1 after use illustrated in FIG. 7 is added with too much functional additive relative to the expected use period, or the strength thereof is relatively too high so that the service life is relatively too long, typically in the state that the majority of the functional additive is mostly unconsumed; so it can be said that the functional additive added to the industrial oil composition C1 is wasted. In this regard, the industrial oil composition C1 after use illustrated in FIG. 7 can also be said that it is in the state that in order to eliminate the functional additive that is wasted without being consumed, the service life relative to the pre-determined use period needs to be shortened by reducing the amount of the functional additive added or by lowering the strength thereof.

[0127] As described above, in the control system Sys1 for circulation and reclamation of the industrial oil, the industrial oil composition C1 that is circulated and reclaimed in this system is controlled by utilizing the fact that the service life of the industrial oil composition C1 and the state of the industrial oil composition C1 after use can be varied by controlling the functional additive added to the industrial oil composition C1.

[0128] In the above description, an overview of the industrial oil composition C1 to be controlled in the control system Sys1 for circulation and reclamation of the industrial oil has been described.<Components of the Control System for Circulation and Reclamation of the Industrial Oil>

[0129] Next, each component in the control system Sys1 for circulation and reclamation of the industrial oil will be described.<Basic Composition of the Production Apparatus>

[0130] The production apparatus 1 is the equipment that produces the industrial oil composition C1 to be controlled in the control system Sys1 for circulation and reclamation of the industrial oil. The production apparatus 1 is installed, for example, in the production plant P1 for production of the industrial oil composition C1. The production apparatus 1 in this embodiment can produce both a new industrial oil composition C1 that is used in the industrial oil use apparatus 2, and an industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 by using the reclaimed oil composition C2 as a raw material.

[0131] The production apparatus 1 may be realized by various known equipment. The production apparatus 1 is composed of, for example, a storage component for taking in and storing the base oil, the antioxidant, the functional additive, and the reclaimed oil composition C2 after reclamation, which are the raw materials for the industrial oil composition C1, and adding equipment for adding and supplying various raw materials stored in the storage component, and mixing equipment for mixing various raw materials added and supplied from the adding equipment.

[0132] The production apparatus 1 in this embodiment produces the industrial oil composition C1 typically on the basis of the composition of the industrial oil composition C1 determined by the composition determination apparatus 5.

[0133] The production apparatus 1 may be configured, for example, to input data concerning the composition of the industrial oil composition C1 determined by the composition determination apparatus 5 (e.g., data concerning the control recipe R to be described later) so as to automatically control each component based on said data to produce the industrial oil composition C1. In this case, the production apparatus 1 is equipped with a data input / output component for inputting and outputting the data, and automatically controls each component based on the data that are input to said data input / output component to produce the industrial oil composition C1. The data input / output component may be realized, for example, by a communication interface that sends and receives various data to and from the composition determination apparatus 5 through communication via a network, whether wired or wireless, or by a recording medium interface that reads and writes various data to and from the recording medium. For example, CD-ROM, DVD, USB memory, SD card memory, Flash memory, hard disk drive (HDD), solid state drive (SSD), flexible disk (FD), magneto-optical disk may be used.

[0134] The production apparatus 1 may be configured, for example, to refer to reference information on the composition of the industrial oil composition C1 determined by the composition determination apparatus 5 (e.g., the control recipe R to be described later) and to control each component by manual operation of an operator based on said reference information to produce the industrial oil composition C1. In this case, the production apparatus 1 is equipped with an operation input component to input operations from the operator, and each component is manually controlled to produce the industrial oil composition C1 based on the operation input to said operation input component. The operation input component may be realized, by for example, a keyboard, a mouse, a trackball, a switch, a button, a touchpad, a touchscreen, a non-contact input circuit, a joystick, and a voice input circuit.

[0135] When producing a new industrial oil composition C1, the production apparatus 1 adds the antioxidant, the functional additive, etc. to the base oil described above as the new oil with the additive strength and amount in accordance with the composition determined by the composition determination apparatus 5, or with the additive strength and amount that have been arbitrarily determined in advance; by so doing, the new industrial oil composition C1 for use in the industrial oil use apparatus 2 is produced. At this time, the composition of the new industrial oil composition C1 may be arbitrarily determined in accordance with the intended use, for example, within the range described in the section <Industrial oil composition to be controlled>, and may be arbitrarily determined in accordance with the composition of a standard product that is selected in advance.

[0136] On the other hand, when the production apparatus 1 produces the industrial oil composition C1 after reclamation by using the reclaimed oil composition C2 as the raw material, it is added the antioxidant, the functional additive, etc. to the reclaimed oil composition C2 in accordance with the composition, the additive strength, and the amount determined at the composition determination apparatus 5, thereby producing the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. At this time, the composition of the industrial oil composition C1 after reclamation is determined, for example, within the range described in the section <Industrial oil composition to be controlled>, and in a proportion suitable for the purpose of properly controlling the industrial oil composition C1 that is circulated and reclaimed in the system.<Basic Composition of the Industrial Oil Use Apparatus>

[0137] The industrial oil use apparatus 2 is the equipment that uses the industrial oil composition C1 that is circulated and reclaimed in the control system Sys1 for circulation and reclamation of the industrial oil. The industrial oil use apparatus 2 is installed, for example, in the use plant P2 where among others, various products are produced, various machine processings are performed, and various equipment are operated, by using the industrial oil composition C1. The industrial oil use apparatus 2 in this embodiment can use both the industrial oil composition C1 newly produced at the production apparatus 1 and the industrial oil composition C1 after reclamation that is produced at the production apparatus 1 using the reclaimed oil composition C2 as the raw material.

[0138] The industrial oil use apparatus 2 may be realized by various known equipment. The industrial oil use apparatus 2 is composed of, for example, a storage component that takes in and stores the industrial oil composition C1 and an operation component that operates with using the industrial oil composition C1 stored in the storage component. The operation component may be realized, for example, by a sliding or machine lubricating component using the industrial oil composition C1 as a turbine oil, a hydraulic oil, a bearing oil, a gear oil, a compressor oil, a traction oil, or by a metal processing component using the industrial oil composition C1 as a cutting oil, a rolling oil, a pressing and drawing oil, a cleaning oil, a plasticizing oil, a punching oil, a heat treatment oil, and a heating medium, among other things.<Basic Composition of the Analysis Apparatus>

[0139] The analysis apparatus 3 is the equipment that analyzes the state of the industrial oil composition C1 after use that is recovered from the industrial oil use apparatus 2. The analysis apparatus 3 is installed, for example, in the analysis component of the reclamation plant P3, which analyzes and reclaims the industrial oil composition C1 after use in the industrial oil use apparatus 2. The analysis apparatus 3 in this embodiment can analyze the state of the industrial oil composition C1 by analyzing a portion of the industrial oil composition C1 after use collected from the industrial oil use apparatus 2 as the sample for analysis. The sample of the industrial oil composition C1 after use that is analyzed by the analysis apparatus 3 may be collected, for example, by taking a portion of the industrial oil composition C1 after use into a sample container / collection kit C1a or the like for analysis at the use plant P2, or by separating a portion of the industrial oil composition C1 after use collected at the reclamation plant P3 into an analytical sample container / collection kit C1a for analysis.

[0140] The analysis apparatus 3 may be realized by various known equipment. The analysis apparatus 3 is composed of, for example, an incorporating component that takes in a sample for analysis of the industrial oil composition C1 after use, an analyzing component that analyzes the sample taken in at the incorporating component, a memory component that stores the analysis results obtained at the analyzing component, and an analysis result output component that outputs the analysis results obtained at the analyzing component. The analyzing component performs, for example, the processing of various analyses, such as a liquid chromatography, an infrared spectroscopic analysis (FTIR), and an inductively coupled plasma (ICP) analysis, which will be described later. The analysis result output component may be realized by, for example, a data input / output component that outputs analysis results as the data, a monitor that outputs analysis results as the images, and a printer that prints out the analysis results. The data input / output component may be configured typically in an almost same manner as the data input / output component in the production apparatus 1 described before.

[0141] The analysis apparatus 3 analyzes, as the state of the industrial oil composition C1 after use, typically the state of consumption of the functional additive in the industrial oil composition C1 after use and the state of admixture of impurity components in the industrial oil composition C1 after use. The analysis apparatus 3 can analyze the consumption state of the functional additive and the admixture state of the impurity components using various known methods, typically such as a spectroscopic analysis and a liquid chromatography.

[0142] For example, the analysis apparatus 3 can analyze the consumption state of the functional additive in the industrial oil composition C1 after use by a liquid chromatography.

[0143] FIG. 8, FIG. 9, and FIG. 10 are the line diagrams illustrating the liquid chromatography as one example of the analysis of the industrial oil composition C1 after use by the analysis apparatus 3. FIG. 8 is one example of the measurement results of the industrial oil composition C1 in the initial state of the use thereof, FIG. 9 is one example of the measurement results in the state of consuming the functional additive, and FIG. 10 is one example of the measurement results in the state that the functional additive has been completely consumed.

[0144] As can be seen in FIG. 8, FIG. 9, and FIG. 10, in the measurement results by the liquid chromatography, the peak strengths originating from the functional additive indicated by the encircled line A gradually decrease from the initial state of use in FIG. 8 to the state that the functional additive is being consumed in FIG. 9 along with the use of the industrial oil composition C1, and further to the state that the functional additive has been completely consumed, resulting in almost complete disappearance of the peaks as can be seen in FIG. 10. By using the liquid chromatography in the analysis apparatus 3 and utilizing this trend, it is possible to analyze the state of the functional additive consumption in the industrial oil composition C1 after use.

[0145] At the analysis apparatus 3, it is also possible to analyze the state of admixture of impurity components in the industrial oil composition C1 after use by an infrared spectroscopic analysis (FTIR), for example.

[0146] FIG. 11 and FIG. 12 are line diagrams of the infrared spectroscopic analysis (FTIR) as one example of the analysis of the industrial oil composition C1 after use in the analysis apparatus 3. FIG. 11 and FIG. 12 each are examples of the measurement results of the industrial oil composition C1 in its initial state of use and in the state that impurity components are mixed, respectively.

[0147] As is clear from FIG. 11 and FIG. 12, in the measurement results by infrared spectroscopic analysis (FTIR), as the industrial oil composition C1 changes from the initial state of use in FIG. 11 to the state in FIG. 12 with the progress of the use thereof, as can be seen in the enclosed line B, the peaks originated from the impurities other than those included in the industrial oil composition C1 at the beginning of use, such as altered components of the functional additive, the base oil, and the antioxidant by decomposition, compounding, and the like during use of the industrial oil composition C1 begin to appear. By utilizing this trend, at the analysis apparatus 3 it is possible to analyze the state of admixture of the impurity components in the industrial oil composition C1 after use by an infrared spectroscopic analysis (FTIR). At the analysis apparatus 3, it is also possible to analyze the state of admixture of solid impurity components such as metals and wear debris that are generated and mixed in during use of the industrial oil composition C1 by ICP (high-frequency inductively coupled plasma) analysis, for example.

[0148] At the analysis apparatus 3 the results of the analysis of the state of the industrial oil composition C1 after use as described above are output via the analysis results output component. At the analysis apparatus 3, said analysis results may be output as the analysis result data by, for example, a data input / output component, or as the analysis result image by a monitor, or as the printed material describing the analysis results by a printer.<Basic Composition of the Reclamation Apparatus>

[0149] The reclamation apparatus 4 reclaims the reclaimed oil composition C2 containing the base oil from the industrial oil composition C1 after use recovered in the industrial oil use apparatus 2. The reclamation apparatus 4 is installed, for example, in the reclamation component in the reclamation plant P3. At the reclamation apparatus 4, the reclaimed oil composition C2, which is the raw material for the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2, can be reclaimed (produced) from the industrial oil composition C1 after use by any of the reclamation methods described in the section <Reclamation of the reclaimed oil composition>.

[0150] The reclamation apparatus 4 may be realized by various known equipment. The reclamation apparatus 4 is composed of, for example, a storage component that takes in and stores the recovered industrial oil composition C1 after use, a reclamation processing component that reclaims the reclaimed oil composition C2 containing the base oil from said industrial oil composition C1 after use by refining the industrial oil composition C1 after use that is stored in the storage component. The reclamation processing component typically performs adsorption, hydrogenation desulfurization, vacuum distillation, and the like as the refining process, and is realized by, for example, addition equipment that adds and supplies the adsorbent and so forth, an agitator, centrifugal equipment, filtering equipment, vacuum distillation equipment, and hydrogenation desulfurization equipment. The reclamation processing component may further be configured so as to perform the aforementioned sulfur measurement.

[0151] At the reclamation apparatus 4 in this embodiment, what is produced is the reclaimed oil composition C2 from the industrial oil composition C1 after use based on typically the analysis results of the state of the industrial oil composition C1 after use that was analyzed at the analysis apparatus 3.

[0152] The reclamation apparatus 4 may be configured, for example, so as to input the data concerning the analysis results of the industrial oil composition C1 after use that is analyzed by the analysis apparatus 3 and automatically control each component based on said data to produce the reclaimed oil composition C2 from the industrial oil composition C1 after use. In this case, the reclamation apparatus 4 is equipped with a data input / output component for inputting and outputting data, and thereby this automatically controls each component based on the data input to said data input / output component to produce the reclaimed oil composition C2. The data input / output component may be configured typically in an almost same manner as the data input / output component in the production apparatus 1 described before.

[0153] The reclamation apparatus 4 may be configured, for example, so as to refer to the reference information about the analysis results of the industrial oil composition C1 after use that is analyzed by the analysis apparatus 3 (e.g., image information about the analysis results, printed materials, etc.) and control each component by manual operation of a worker based on said reference information to produce the reclaimed oil composition C2 from the industrial oil composition C1 after use. In this case, the reclamation apparatus 4 is provided with an operation input component for inputting the operation from an operator, and produces the reclaimed oil composition C2 by manually controlling each component based on the operation that is input to said operation input component. The operation input component may be configured typically in an almost same manner as the operation input component in the production apparatus 1 described before.<Basic Composition of the Composition Determination Apparatus>

[0154] At the composition determination apparatus 5, what is determined is the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. The composition determination apparatus 5 is installed, for example, in the analysis component in the reclamation plant P3 together with the analysis apparatus 3 and other equipment. At the composition determination apparatus 5, what can be determined is the composition of the industrial oil composition C1 after reclamation based on various information.

[0155] The composition determination apparatus 5 may be realized by various known equipment. The composition determination apparatus 5 may be realized typically by various computer devices such as a laptop PC, a desktop PC, a tablet PC, and a smart phone, among others. The composition determination apparatus 5 is composed of, for example, a memory component that stores the composition determination results and a composition result output component that outputs the composition determination results. The composition result output component may be configured typically in an almost same manner as the analysis result output component in the analysis apparatus 3 described before.

[0156] When determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 of this embodiment controls the industrial oil composition C1 that is circulated and reclaimed by controlling the functional additive to be added to the reclaimed oil composition C2.

[0157] In other words, when determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 controls the functional additive to be added to the reclaimed oil composition C2 for the purpose of controlling the industrial oil composition C1 that is circulated and reclaimed in this system. By so doing, the control system Sys1 for circulation and reclamation of the industrial oil controls, for example, the service life of the industrial oil composition C1 and the quality of the industrial oil composition C1 after use, as described above.

[0158] The composition determination apparatus 5 may be configured, for example, so as to input various data (e.g., data such as the analysis results of the industrial oil composition C1 after use analyzed by the analysis apparatus 3) and determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 through the arithmetic processing based on said data. In this case, the composition determination apparatus 5 is provided with a data input / output component for inputting and outputting the data, and thereby determines the composition of the industrial oil composition C1 after reclamation by automatic calculation based on the data that are input to said data input / output component. The data input / output component may be configured typically in an almost same manner as the data input / output component in the production apparatus 1 described before.

[0159] The composition determination apparatus 5 may be configured, for example, so as to refer to various reference information (e.g., image information or printed material describing the analysis results of the industrial oil composition C1 after use analyzed by the analysis apparatus 3), and thereby determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 by manual operation of a worker based on said reference information. In this case, the composition determination apparatus 5 is provided with an operation input component for inputting operation from the operator, and determines the composition of the industrial oil composition C1 after reclamation based on the operation input to said operation input component. The operation input component may be configured typically in an almost same manner as the operation input component in the production apparatus 1 described before.

[0160] The composition determination apparatus 5 of this embodiment determines the composition of the industrial oil composition C1 after reclamation by controlling the amount and strength of the functional additive to be added to the industrial oil composition C1 within the range described in the section <Industrial oil composition to be controlled> and in accordance with the purpose of control of the industrial oil composition C1 that is circulated and reclaimed in the system. The details of composition determination for proper control of the industrial oil composition C1 that is circulated and reclaimed in the system will be explained later more specifically with reference to FIG. 14 through FIG. 19, among others.

[0161] The composition determination apparatus 5 then outputs the result of the determination of the composition of the industrial oil composition C1 after reclamation via the composition result output component. The composition determination apparatus 5 may output, for example, the decision result as the decision result data by a data input / output component, as the decision result image by a monitor, or as the printed material describing the decision result by a printer. In the following description, the material describing the result of the determination of the composition of the industrial oil composition C1 after reclamation by the composition determination apparatus 5 is sometimes referred to as “control recipe R”. In other words, the composition determination apparatus 5 may output the result of the determination of the composition of the industrial oil composition C1 after reclamation as the data related to the control recipe R, as the image describing the control recipe R, or as the printed material describing the control recipe R. Then, as described above, the production apparatus 1 produces the industrial oil composition C1 based on the control recipe R (result of the determination of the composition of the industrial oil composition C1) determined and output by this composition determination apparatus 5.<Basic Composition of the Transport Carrier>

[0162] The transport carrier 6 is a moving unit that transports the industrial oil composition C1 or the reclaimed oil composition C2 among the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4. The transport carrier 6 may be controlled, for example, by the entity that controls the production plant P1 or the reclamation plant P3, or it may be controlled by the entity that is different from said entity, i.e., those specialized in transport and transportation, or by the entity specialized in the collection of the industrial oil composition C1 after use, or other entities. The transport carrier 6 in this embodiment can transport the industrial oil composition C1 or the reclaimed oil composition C2 among various locations where the production apparatus 1, the industrial oil use apparatus 2, the reclamation apparatus 4, etc. are installed, in this case, among the production plant P1, the use plant P2, and the reclamation plant P3.

[0163] The transport carrier 6 may be realized by a variety of known moving vehicles. The transport carrier 6 may be realized by typically: freight vehicles that travel on a road surface, such as a truck, a tank trailer, and a tank lorry; freight trains that travel on railroad tracks, such as a container freight train and a tank wagon train; freight vessels that sail on the ocean, such as a tanker; and cargo flying vehicles that fly in the air, such as an aircraft and a drone, among other vehicles.<Basic Composition of the Storage Facility>

[0164] The storage facility 7 is a facility for storing the industrial oil composition C1 or the reclaimed oil composition C2. The storage facility 7 is installed together with, for example, the production apparatus 1, the reclamation apparatus 4, and the like at the production plant P1, the reclamation plant P3, and the like.

[0165] The storage facility 7 may be realized by various known facilities. The storage facility 7 may be realized typically by a storage tank or the like.<Variations of Each Composition of the Control System for Circulation and Reclamation of the Industrial Oil>

[0166] In the above explanation, the production apparatus 1 is installed in the production plant P1, the industrial oil use apparatus 2 is installed in the use plant P2, the analysis apparatus 3 and the composition determination apparatus 5 are installed in the analysis component of the reclamation plant P3, and the reclamation apparatus 4 is installed in the reclamation component in the reclamation plant P3, but this is not limited thereto.

[0167] For example, the production apparatus 1, the industrial oil use apparatus 2, the analysis apparatus 3, the reclamation apparatus 4, and the composition determination apparatus 5 may all be located together at a single site. For example, it has been described that the analysis apparatus 3, the reclamation apparatus 4, and the composition determination apparatus 5 are installed in the reclamation plant P3, but they may be installed in different locations. For example, the analysis apparatus 3 and the reclamation apparatus 4 may be installed in the reclamation plant P3, and the composition determination apparatus 5 may be installed in the production plant P1. For example, the analysis apparatus 3 and the composition determination apparatus 5 may be configured as single equipment and used concurrently by single equipment. For example, the storage facility 7 may be installed together with the industrial oil use apparatus 2 in the use plant P2 or the like, or it may be installed at a dedicated storage site independent of the production plant P1, the reclamation plant P3, and the like. The storage facility 7 may also serve as the storage facility for the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4.

[0168] The production apparatuses 1, the industrial oil use apparatuses 2, the analysis apparatuses 3, and the reclamation apparatuses 4 each may be installed as multiple units, respectively, in the control system Sys1 for circulation and reclamation of the industrial oil. For example, the production apparatus 1 may be installed separately to produce the industrial oil composition C1 to be newly used in the industrial oil use apparatus 2 and to produce the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 using the reclaimed oil composition C2 as the raw material. For example, a plurality of the production apparatuses 1, the industrial oil use apparatuses 2, the analysis apparatuses 3, and the reclamation apparatuses 4 may each be installed and treated as a group for each given site. Similarly, in the control system Sys1 for circulation and reclamation of the industrial oil a plurality of the composition determination apparatuses 5 may be installed.

[0169] For example, when a plurality of the industrial oil use apparatuses 2 are installed, the composition determination apparatus 5 may control separately for each of the multiple industrial oil use apparatuses 2 the composition of the industrial oil composition C1 after reclamation that is going to be re-used in these industrial oil use apparatuses 2.

[0170] In this case, in the industrial oil use apparatus 2, a first industrial oil use apparatus 2 from which the industrial oil composition C1 after use is recovered may be different from a second industrial oil use apparatus 2 that re-uses the industrial oil composition C1 after reclamation that uses as the raw material the reclaimed oil composition C2 that is reclaimed from the industrial oil composition C1 after use. In other words, in this case, the first industrial oil use apparatus 2 corresponds to the industrial oil use apparatus 2 with which the industrial oil composition C1 after use is recovered to obtain the reclaimed oil composition C2. On the other hand, the second industrial oil use apparatus 2 corresponds to the industrial oil use apparatus 2 that re-uses the industrial oil composition C1 after reclamation, which is obtained from the reclaimed oil composition C2 reclaimed from the industrial oil composition C1 after use that is recovered from the said first industrial oil use apparatus 2. In this case, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in a second industrial oil use apparatus 2 by setting the second industrial oil use apparatus 2 that re-uses the industrial oil composition C1 after reclamation as the object, and when determining the composition, the functional additive to be added to the reclaimed oil composition C2 may be controlled so as to control the industrial oil composition C1 that is circulated and reclaimed. In this case, for example, when the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after use based on the analysis results of the industrial oil composition C1 after use by the analysis apparatus 3, the composition of the industrial oil composition C1 after reclamation may be determined based on the analysis results of the industrial oil composition C1 after use that is recovered from that second industrial oil use apparatus 2.

[0171] The above is a brief overview of the overall composition of the control system Sys1 for circulation and reclamation of the industrial oil<the Flow of Each Step of the Control Method for Circulation and Reclamation of the Industrial Oil in the Control System for Circulation and Reclamation of the Industrial Oil, and Each Step of the Production Method for the Reclaimed Industrial Oil Composition>

[0172] Next, with reference to FIG. 13, one example of the flow of each step of the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition that are executed in the control system Sys1 for circulation and reclamation of the industrial oil will be described. The flow of each process described below is only a representative example and is not limited to this.

[0173] The production method for the reclaimed industrial oil composition in this embodiment includes a recovery step (Step S4), an analysis step (Step S5), a reclamation step (Step S7), a composition determination step (Step S9), and a production step (Step S11). In addition to the above, the control method for circulation and reclamation of the industrial oil in this embodiment includes an industrial oil use step (Step S3) and an industrial oil re-use step (Step S13), namely, this includes the industrial oil use step (Step S3), the recovery step (Step S4), the analysis step (Step S5), the reclamation step (Step S7), the composition determination step (Step S9), the production step (Step S11), and the industrial oil re-use step (Step S13).

[0174] The industrial oil use step (Step S3) is the step of using the industrial oil composition C1 in the industrial oil use apparatus 2. The recovery step (Step S4) is the step of recovering the industrial oil composition C1 after use from the industrial oil use apparatus 2. The analysis step (Step S5) is the step of analyzing the state of the industrial oil composition C1 after use that is recovered. The reclamation step (Step S7) is the step of producing the reclaimed oil composition C2 containing the base oil from the industrial oil composition C1 after use that is recovered. The composition determination step (Step S9) is the step of determining the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. The production step (Step S11) is the step of adding the functional additive to the reclaimed oil composition C2 after reclamation based on the composition determined by the composition determination step (Step S9) to produce the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. The industrial oil re-use step (Step S13) is the step of reusing in the industrial oil use apparatus 2 the industrial oil composition C1 after reclamation that is produced at the production step (Step S11).

[0175] The industrial oil use step (Step S3) and the industrial oil re-use step (Step S13) are performed typically in the industrial oil use apparatus 2. The recovery step (Step S4) is performed typically in the industrial oil use apparatus 2 and the transport carrier 6. The analysis step (Step S5) is performed typically in the analysis apparatus 3. The reclamation step (Step S7) is performed typically in the reclamation apparatus 4. The composition determination step (Step S9) is performed typically in the composition determination apparatus 5. The production step (Step S11) is performed typically in the production apparatus 1.

[0176] Specifically, first, the industrial oil composition C1 for initial use in the industrial oil use apparatus 2 is produced in the production apparatus 1 as an initial production step (Step S1).

[0177] In this case, in the production apparatus 1 the industrial oil composition C1 that is going to be used for the first time may be produced by adding the antioxidant, the functional additive, and so forth to the new base oil, or the industrial oil composition C1 to be used for the first time may be produced by adding the antioxidant, the functional additive, and so forth to the reclaimed oil composition C2 after reclamation that has been produced in advance.

[0178] In this case, in the production apparatus 1 the industrial oil composition C1 for the first use is produced by adding the antioxidant, the functional additive, and so forth with the additive strength and amount in accordance with the composition determined by the composition determination apparatus 5, or with the additive strength and amount that have been arbitrarily determined in advance. The composition of the industrial oil composition

[0179] C1 that is going to be used for the first time may be determined arbitrarily in accordance with the intended use within the range described in the aforementioned section <Industrial oil composition to be controlled>, and may be determined, for example, in proportion to the composition of a standard product selected in advance.

[0180] The industrial oil composition C1 produced by the production apparatus 1 may be temporarily stored in the storage facility 7 or the like attached to the production plant P1 before being shipped to the use plant P2 or the like for use.

[0181] Next, as an industrial oil composition delivery step, the industrial oil composition C1 produced in the production apparatus 1 is transported and delivered by the transport carrier 6 to the use plant P2 where the industrial oil use apparatus 2 that uses said industrial oil composition C1 is installed (Step S2).

[0182] Next, as the industrial oil use step, the industrial oil use apparatus 2 uses the delivered industrial oil composition C1 in said industrial oil use apparatus 2 (Step S3). For example, the industrial oil use apparatus 2 uses the industrial oil composition C1 to produce various products, perform various types of machining, operate various types of equipment, among others.

[0183] Next, after a predetermined use period assumed in advance has passed from the start of use of the industrial oil composition C1 in the industrial oil use apparatus 2, the transport carrier 6 collects as the recovery step the industrial oil composition C1 after use from the industrial oil use apparatus 2 and transports it to the reclamation plant P3 where the analysis apparatus 3, the reclamation apparatus 4, and so forth are installed (Step S4).

[0184] In this case, the industrial oil composition C1 after use may be transported to the reclamation plant P3 under the state that it has the sample for analysis separated by the analytical sample container / collection kit C1a or the like from the composition to be reclaimed in the use plant P2. With regard to the industrial oil composition C1 after use that is transported to the reclamation plant P3, the sample separated by the analytical sample container / collection kit C1a or the like is delivered to the analysis component in the reclamation plant P3, and the remainder to the reclamation component. In the above, it is described that the sample of the industrial oil composition C1 after use that is separated by the analytical sample container / collection kit C1a or the like is collected after a predetermined use period, which is assumed from the start of use of the industrial oil composition C1 in the industrial oil use apparatus 2, and then transported to the reclamation plant P3 for analysis by the analysis apparatus 3. However, the description is not limited to this. The sample for analysis of the industrial oil composition C1 after use may be recovered and collected periodically or irregularly as a sample recovery step by means of the analytical sample container / collection kit C1a or the like for analysis (Step S4a), even before the use period has passed, that is, during use in the industrial oil use apparatus 2, and then transported to the reclamation plant P3 for analysis of the deterioration state and the like by the analysis apparatus 3.

[0185] Next, the analysis apparatus 3 analyzes the state of the recovered industrial oil composition C1 after use as the analysis step (Step S5). Here, the analysis apparatus 3 analyzes the consumption state of the functional additive in the industrial oil composition C1 after use and the admixture state of impurity components in the industrial oil composition C1 after use by using the sample that is separated by the analytical sample container / collection kit C1a or the like. The analysis apparatus 3 analyzes the consumption state of the functional additive and the admixture state of the impurity components by using various known methods, such as a spectroscopic analysis and a liquid chromatography, as described above.

[0186] Next, the analysis apparatus 3 outputs the analysis result of the state of the industrial oil composition C1 after use via the analysis result output component as an analysis result output step (Step S6). The analysis apparatus 3 outputs said result to the reclamation apparatus 4 and to the composition determination apparatus 5. At the analysis apparatus 3, said analysis results may be output as the analysis result data by, for example, a data input / output component, or as the analysis result image by a monitor, or as the printed material describing the analysis results by a printer.

[0187] Next, from the recovered industrial oil composition C1 after use, the reclamation apparatus 4 reclaims as the reclamation step (Step S7) the reclaimed oil composition C2 that contains the base oil. In this case, the reclamation apparatus 4 reclaims the reclaimed oil composition C2 from the industrial oil composition C1 after use by using any one of the reclamation methods described in the section <Reclamation of the reclaimed oil composition>. Here, the reclamation apparatus 4 reclaims the reclaimed oil composition C2 from the industrial oil composition C1 after use by the reclamation method selected in accordance with the state of the industrial oil composition C1 after use, typically based on the analysis results (analysis result data, analysis result images, printed material showing the analysis results, etc.) on the state of the industrial oil composition C1 after use that are output from the analysis apparatus 3.

[0188] The reclaimed oil composition C2 produced by the reclamation apparatus 4 may be temporarily stored in the storage facility 7 and the like attached to the reclamation plant P3 before it is transported to the production plant P1 and so forth.

[0189] Next, as a reclaimed oil composition delivery step (Step S8), the transport carrier 6 transports and delivers the reclaimed oil composition C2 produced by the reclamation apparatus 4 to the production plant P1 where the production apparatus 1 is installed.

[0190] The reclaimed oil composition C2 thus delivered to the production plant P1 may be temporarily stored in the storage facility 7 and the like attached to the production plant P1 before it is used as the raw material for the industrial oil composition C1 after reclamation in the production apparatus 1.

[0191] Next, as a composition determination step (Step S9), the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2.

[0192] In this case, when determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 controls the industrial oil composition C1 that is circulated and reclaimed by controlling the functional additive to be added to the reclaimed oil composition C2. In other words, the composition determination apparatus 5 controls the functional additive to be added to the reclaimed oil composition C2 in order to control the industrial oil composition C1 that is circulated and reclaimed in the system; by so doing, for example, the service life of the industrial oil composition C1 or the quality of the industrial oil composition C1 after use may be controlled.

[0193] For example, at the composition determination step (Step S9), based at least on the analysis result by the analysis apparatus 3 at the analysis step (Step S5), the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. In other words, in accordance with, among other things, the state and actual degradation indicator of the industrial oil composition C1 after use, the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation based on the analysis results (analysis result data, analysis result images, printed material describing the analysis results, etc.) on the state of the industrial oil composition C1 after use, the results being output from the analysis apparatus 3. Here, the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation by controlling the amount and strength of the functional additive to be added to the industrial oil composition C1 after reclamation within the range described in the section <Industrial oil composition to be controlled> and for the purpose of controlling the service life of the industrial oil composition C1 and the quality of the industrial oil composition C1 after use.

[0194] Next, the composition determination apparatus 5 outputs the determination result of the composition of the industrial oil composition C1 after reclamation via the composition result output component as a determination result output step (Step S10). The composition determination apparatus 5 outputs the determination result to the production apparatus 1. The composition determination apparatus 5 may, for example, output the result of such determination as the data concerning the control recipe R by the data input / output component, as the image describing the control recipe R by the monitor, or as the printed material describing the control recipe R by the printer.

[0195] The before and after relationship between the reclamation step (Step S7) and the composition determination step (Step S9) is not limited to the above order. Therefore, at the reclamation step (Step S7) and the composition determination step (Step S9), the reclamation step (Step S7) may be performed after the composition determination step (Step S9) is performed first, or the reclamation step (Step S7) and the composition determination step (Step S9) may be performed concurrently.

[0196] Next, as the production step, the production apparatus 1 adds the antioxidant and the functional additive to the reclaimed oil composition C2 after reclamation based on the composition determined by the composition determination apparatus 5 at the composition determination step (Step S9) to produce the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 (Step S11). In this case, the production apparatus 1 performs

[0197] an addition step to add the antioxidant, the functional additive, and the like to the reclaimed oil composition C2 reclaimed by the reclamation apparatus 4 at the reclamation step (Step S7) to produce the industrial oil composition C1 after reclamation. In this case, the production apparatus 1 produces the industrial oil composition C1 after reclamation by adding the antioxidant, the functional additive, and the like to the reclaimed oil composition C2 with the strength and amount of the additives in accordance with the composition that is determined by the composition determination apparatus 5 based on the determination results (data concerning the control recipe R, images describing the control recipe R, and a printed material describing the control recipe R) that are output from the composition determination apparatus 5 with respect to the composition of the industrial oil composition C1 after reclamation.

[0198] In the same manner as described above, the industrial oil composition C1 after reclamation that is produced by the production apparatus 1 may be temporarily stored in the storage facility 7 or the like, which is attached to the production plant P1, before it is transported to the use plant P2 and so forth.

[0199] Next, similarly to the Step S2 described above, as a reclaimed industrial oil composition delivery step (Step S12), the transport carrier 6 transports and delivers the industrial oil composition C1 after reclamation that is produced by the production apparatus 1 to the use plant P2 where the industrial oil use apparatus 2 that uses said industrial oil composition C1 is installed.

[0200] Next, similarly to the Step S13 described above, as an industrial oil re-use step (Step S13), the industrial oil use apparatus 2 uses the delivered industrial oil composition C1 after reclamation in this industrial oil use apparatus 2.

[0201] Thereafter, by repeating the steps from Step S4 to Step S13 described above, the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2 is established in the control system Sys1 for circulation and reclamation of the industrial oil.

[0202] <Determination and control of the composition of the industrial oil composition>

[0203] Next, the details of the composition determination for control of the industrial oil composition C1 that is circulated and reclaimed in the control system Sys1 for circulation and reclamation of the industrial oil will be described with reference to FIG. 14 through FIG. 19.

[0204] As described above, the control system Sys1 for circulation and reclamation of the industrial oil controls the industrial oil composition C1 that is circulated and reclaimed in this system by utilizing the fact that the service life of the industrial oil composition C1 and the state of the industrial oil composition C1 after use can be varied by controlling the functional additive that is added to the industrial oil composition C1. Here, the control of the industrial oil composition C1 that is circulated and reclaimed includes, for example, the control of the service life of the industrial oil composition C1 and the quality of the industrial oil composition C1 after use. Namely, the control system Sys1 for circulation and reclamation of the industrial oil controls the service life of the industrial oil composition C1 and the quality of the industrial oil composition C1 after use by controlling the strength and amount of the functional additive that is added to the reclaimed oil composition C2 for the purpose of controlling the industrial oil composition C1 by the composition determination apparatus 5 at the composition determination step (Step S9). Hereinafter, a specific example of the composition determination and control with regard to the industrial oil composition C1 will be described with reference to FIG. 14 through FIG. 19.

[0205] The composition determination apparatus 5 may control the addition amount and strength of the functional additive without stages within the range described in the section <Industrial oil composition to be controlled> in accordance with the purpose of control, but in the following explanation, as described in FIG. 14, for the sake of convenience and clarity, the strength is controlled in 3 stages, the addition amount in 5 stages, and the combination of strength and addition amount in 15 stages in total. In this section, the industrial oil composition C1 with the strength of “medium” and the functional additive amount of “3” shall be treated as the “standard product”.

[0206] In controlling the functional additives, typically the priority may be put to reduce the addition amount to a relatively low level. This is because a relatively smaller addition amount of the functional additive in the industrial oil composition C1 tends to result in relatively fewer impurities in the industrial oil composition C1 after use, so that relatively fewer objects need to be removed from the industrial oil composition C1 after use when the reclaimed oil composition C2 is produced from said industrial oil composition C1 after use.

[0207] However, some types of the functional additive are more expensive than others, and even if the addition amount thereof itself is small, the higher unit price may lead to a relatively higher total cost (e.g., the relatively higher the strength, the higher the unit price tends to be).

[0208] Therefore, in controlling the functional additive, the control priority may be determined based on the balance between the cost and the effectiveness, such as reducing the addition amount as much as possible with lowering the priority of those with high unit price.

[0209] Each step in the composition determination apparatus 5 described below may be executed by arithmetic processing by the arithmetic component of the composition determination apparatus 5 itself, or by manual processing by a worker's operation via the operation input component.<Composition Determination and Control of the Industrial Oil Composition: Specific Example 1 of Composition Determination and Control>

[0210] Specific example 1, illustrated in FIG. 15 through FIG. 17, describes an example of controlling the quality of the industrial oil composition C1 after use. In other words, in this specific example 1, the control of the industrial oil composition C1 includes the control of the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over. FIG. 15 through FIG. 17, described below, describe examples of specific processing details in the composition determination step (Step S9) described above.

[0211] In this case, at the composition determination step (Step S9), in determining the composition of the industrial oil composition C1 after reclamation the composition determination apparatus 5 controls the quality of the industrial oil composition C1 after use whose use period has been over by controlling the functional additive to be added to the reclaimed oil composition C2. In other words, in this specific example 1, the object to be controlled by the composition control of the industrial oil composition C1 after reclamation by the composition determination apparatus 5 is the quality and condition of the industrial oil composition C1 after use whose pre-assumed use period has been over.

[0212] More specifically, at the composition determination step (Step S9), the composition determination apparatus 5 controls and determines the composition of the industrial oil composition C1 after reclamation by controlling the strength or the addition amount of the functional additive so that the quality of the industrial oil composition C1 after use whose use period has been over will become the prescribed quality. The composition determination apparatus 5 then outputs the control recipe R in accordance with this determined composition. In other words, the composition determination apparatus 5 outputs said control recipe R by changing the composition of the industrial oil composition C1 after reclamation produced by the production apparatus 1 in accordance with the prescribed quality of the industrial oil composition C1 after use. The production apparatus 1 then produces the industrial oil composition C1 after reclamation based on this control recipe R. In this way, the composition determination apparatus 5 optimizes the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be the desired level.

[0213] The use period of the industrial oil composition C1 subject to the quality control is an arbitrarily assumed period in advance, and this may be arbitrarily determined in accordance with, for example, the intended use of the industrial oil composition C1, the type of the industrial oil use apparatus 2 to be used, the operation plan and scheduled operation period of the industrial oil use apparatus 2, and the period during which the proper function of the industrial oil composition C1 is guaranteed, among others. The use period may be set as a fixed period or as a variable period depending on the operating conditions of the industrial oil use apparatus 2; for example, different lengths may be set for the busy season when the industrial oil use apparatus 2 operates at a high load and the off-peak season when it operates at a low load. In either case, the quality control of the industrial oil composition C1 after use by the composition determination apparatus 5 is performed for the pre-assumed use period assumed in advance.

[0214] As one example, the prescribed quality in the quality control of the industrial oil composition C1 after use is the quality corresponding to the standard state as illustrated in FIG. 5. In other words, the composition determination apparatus 5 conducts the quality control in the way the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over will become so that most of the functional additive added to the industrial oil composition C1 have been consumed with some portion being unconsumed, and that the composition contains some impurity components including wear debris, as illustrated in FIG. 5. In other words, the composition determination apparatus 5 controls the quality of the industrial oil composition C1 after use whose use period has been over by controlling the strength and amount of the functional additive to be added to the industrial oil composition C1 with the goal of achieving the quality equivalent to a balanced standard state in which the functional additive in the industrial oil composition C1 is not wasted and there is no risk of the damage to the base oil after the relevant use period has been over.

[0215] Specifically, as illustrated in FIG. 15, the composition determination apparatus 5 first obtains the analysis result on the state of the industrial oil composition C1 after use that is recovered from the industrial oil use apparatus 2 after the pre-assumed use period has been over (Step S100). Typically, at the analysis result output step (Step S6) described above, the composition determination apparatus 5 acquires the analysis result on the state of the industrial oil composition C1 after use that is output from the analysis apparatus 3 via the analysis result output component.

[0216] Next, the composition determination apparatus 5 determines whether or not the functional additive in the industrial oil composition C1 after use is in the state that the functional additive is almost 100% consumed (completely consumed state) based on the analysis result obtained at the Step S100 (Step S101). The composition determination apparatus 5 can determine the consumption state of the functional additive in the industrial oil composition C1 after use, based on, for example, the result of analysis with regard to a liquid chromatography among the results by the analysis apparatus 3 (the same is true for the same type of determination below).

[0217] When the composition determination apparatus 5 determines that the functional additive in the industrial oil composition C1 after use is almost 100% consumed (state of completely consumed) (Step S101: Yes), it determines whether or not the impurity components in the industrial oil composition C1 after use are above a predetermined rate, 5% or more in this case (Step S102). The composition determination apparatus 5 can determine the mixed state of the impurity components in the industrial oil composition C1 after use, based on, for example, the analysis result with regard to the infrared spectroscopic analysis (FTIR) among the analysis results by the analysis apparatus 3 (the same is true for the same type of determination below).

[0218] When the composition determination apparatus 5 determines that the impurity components in the industrial oil composition C1 after use is 5% or more (Step S102: Yes), it determines that the industrial oil composition C1 after use is in an “excessively used state” as illustrated in FIG. 3 (Step S103).

[0219] Next, the composition determination apparatus 5 determines whether or not the strength of the current functional additive added to the industrial oil composition C1 after use in question is “high (strong)” (Step S104). For example, the composition determination apparatus 5 can determine whether or not the current strength of the functional additive is “high (strong) “, based on, for example, the history of the previous control recipe R and the analysis results by the analysis apparatus 3 (the same is true for the same type of determination below). When the composition determination apparatus 5

[0220] determines that the current strength of the functional additive added to the industrial oil composition C1 after use is “high” (Step S104: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is “no change” from the current strength, and the addition amount thereof is determined to be “+2” relative to the current amount, thereby outputting the control recipe R in accordance with this determined result (Step S105); and with this, this process is terminated. Here, “+2” relative to the current addition amount is equivalent to increasing the addition amount by, for example, an approximately 20% by mass relative to the current amount added (the same applies below).

[0221] The production apparatus 1 then produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 based on this control recipe R. As a result, the industrial oil composition C1 after reclamation has a relatively larger amount of the functional additive added than the previous one, which allows for a relatively longer service life relative to the expected use period. In other words, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to “standard state”, as illustrated in FIG. 5 from the quality corresponding to the “excessive use state” as illustrated in FIG. 3; with this, the damage to the base oil may be prevented. Here, the composition determination apparatus 5 can reduce the number of trials until optimization by significantly changing the amount of the functional additives in two stages by setting the addition amount of the functional additive to “+2” relative to the current addition amount.

[0222] When the composition determination apparatus 5 determines at the determination of Step S104 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “high” (Step S104: No), it determines whether the strength of the current functional additive added to the industrial oil composition C1 after use is “low (weak)” or not (Step S106).

[0223] When the composition determination apparatus 5 determines that the strength of the current functional additive added to the industrial oil composition C1 after use is “low” (Step S106: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is set “+2” (i.e., “high”) relative to the current strength, and the addition amount thereof is set “no change” from the current addition amount, and thereby outputting the control recipe R in accordance with the result of this determination (Step S107); and with this, this process is terminated.

[0224] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively higher strength of the functional additive than the previous one, which allows for a relatively longer service life relative to the expected use period. In this case, in the way as described above, the composition determination apparatus 5 also determines the composition of the industrial oil composition C1 after reclamation, so that the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over can be controlled so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5, from the quality corresponding to the “excessive use state”, as illustrated in FIG. 3; with this, the damage to the base oil may be prevented. Here, the composition determination apparatus 5 can reduce the number of trials until optimization by significantly changing the strength of the functional additive in two stages by setting it to “+2” relative to the current strength. Also here, in controlling the functional additive, for example, the strength of the functional additives is controlled with the priority given to maintaining a relatively low addition amount.

[0225] When the composition determination apparatus 5 determines in the determination Step S106 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “low”, that is, the strength of the current functional additive is “medium (standard)” (Step S106: No), in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is determined to be “+1” (i.e., “high”) relative to the current strength, and the addition amount to be “+1” relative to the current addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S108); and with this, this process is terminated. Here, “+1” relative to the current addition amount corresponds to increase the addition amount by, for example, an approximately 10% by mass relative to the current addition amount (the same applies below).

[0226] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2.

[0227] As a result, the industrial oil composition C1 after reclamation has a relatively higher strength of the functional additive and a relatively larger amount of the functional additive than the previous one, which allows for a relatively longer service life relative to the pre-assumed use period. In this case, in the way as described above, the composition determination apparatus 5 also determines the composition of the industrial oil composition C1 after reclamation, so that the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over can be controlled so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5, from the quality corresponding to the “excessive use state”, as illustrated in FIG. 3; with this, the damage to the base oil may be prevented.

[0228] When the composition determination apparatus 5 determines at the determination of Step S102 that the impurity components in the industrial oil composition C1 after use is less than 5% (Step S102: No), it determines that the industrial oil composition C1 after use is in the “suitable state for a long life but with some room for improvement”, as illustrated in FIG. 4 (Step S109).

[0229] Next, the composition determination apparatus 5 determines whether the strength of the current functional additive added to the industrial oil composition C1 after use in question is “high” or not (Step S110).

[0230] When the composition determination apparatus 5 determines that the current strength of the functional additive added to the industrial oil composition C1 after use is “high” (Step S110: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is “no change” from the current strength, and the addition amount thereof is determined to be “+1” relative to the current amount, thereby outputting the control recipe R in accordance with this determined result (Step S111); and with this, this process is terminated.

[0231] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2.

[0232] As a result, the industrial oil composition C1 after reclamation has a relatively larger amount of the functional additive added than the previous one, which allows for a relatively longer service life relative to the expected use period. In other words, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state” as illustrated in FIG. 5 from the quality corresponding to the “suitable state for a long life but with some room for improvement” as illustrated in FIG. 4; with this, the damage to the base oil can be prevented more surely.

[0233] When the composition determination apparatus 5 determines at the determination Step S110 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “high”, that is, the strength of the functional additive is “medium” or “low” (Step S110: No), in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is determined to be “+1” (i.e., “high” or “medium”) relative to the current strength and the addition amount to be “no change” from the current addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S112); and with this, this process is terminated.

[0234] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively higher strength of the functional additive than the previous one, which allows for a relatively longer service life relative to the expected use period. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state” as illustrated in FIG. 5 from the quality corresponding to the “suitable state for a long life but with some room for improvement” as illustrated in FIG. 4; with this, the damage to the base oil can be prevented more surely. Here, in controlling the functional additive, for example, the strength of the functional additives is controlled with the priority given to maintaining a relatively low addition amount.

[0235] When the composition determination apparatus 5 determines at the determination Step S101 that the functional additive in the industrial oil composition C1 after use is not in the state of approximately 100% consumption (completely consumed state) (Step S101: No), it is determined whether or not the functional additive consumption is 85% or more and less than 100%, as illustrated in FIG. 16 (Step S113).

[0236] When the composition determination apparatus 5 determines that the consumption of the functional additive in the industrial oil composition C1 after use is 85% or more and less than 100% (Step S113: Yes), it is determined that the industrial oil composition C1 after use is in the “standard state” as illustrated in FIG. 5 (Step S114).

[0237] Next, the composition determination apparatus 5 determines whether the strength of the current functional additive added to the industrial oil composition C1 after use in question is “high” or not (Step S115).

[0238] When the composition determination apparatus 5 determines that the strength of the current functional additive added to the industrial oil composition C1 after use is “high” (Step S115: Yes), it determines in the history until today whether or not it has ever tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, namely, it determines whether or not it has ever tried the composition having the addition amount increased and the strength set to “medium” (Step S116). This judgment is used for selection of a more optimal functional additive based on the balance between cost and effectiveness while avoiding the use of the additive having a high unit price, such as in the case when the functional additive having a “high” strength is relatively expensive.

[0239] When the composition determination apparatus 5 determines that, in the history up to now, it has tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, that is, it determines that it has tried to increase the addition amount relative to the current composition while setting the strength at “medium” (Step S116: Yes), it determines that the present composition is optimal; then, it determines to make “no change” in both the strength and the addition amount of the functional additive, and thereby outputting the control recipe R in accordance with this determined result (Step S117); and with this, this process is terminated.

[0240] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2.

[0241] As a result, the industrial oil composition C1 after reclamation is produced with the same composition as before. In other words, by determining the composition of the industrial oil composition C1 after reclamation as described above, the composition determination apparatus 5 can control so as to maintain the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5.

[0242] At the determination Step S116, when the composition determination apparatus 5 determines that in the history up to now, it has never tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, that is, it determines that the composition having the addition amount increased while setting the strength at “medium” has never been tried (Step S116: No), then in the composition of the industrial oil composition C1 after reclamation to be produced next time, it determines that the strength of the functional additive is set to “−1” (i.e., “medium”) relative to the current strength and the addition amount to “+1” relative to the current addition amount, and thereby outputting the control recipe R in accordance with this determination result (Step S118); and with this, this process is terminated.

[0243] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, by determining the composition of the industrial oil composition C1 after reclamation in the way as described above, the composition determination apparatus 5 can try the composition that maintains the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5, while avoiding the use of a relatively expensive functional additive thereby relatively lowering the total cost.

[0244] When the composition determination apparatus 5 determines at the determination of Step S115 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “high” (Step S115: No), it determines whether the strength of the current functional additive added to the industrial oil composition C1 after use is “low” or not (Step S119). When the composition determination apparatus 5

[0245] determines that the strength of the current functional additive added to the industrial oil composition C1 after use is “low” (Step S119: Yes), it determines to make “no change” from the current level in both the strength of the functional additive and the addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S120); and then, this process is terminated.

[0246] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation is produced with the same composition as before. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the way as described above, the composition determination apparatus 5 can control so as to maintain the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5.

[0247] When the composition determination apparatus 5 determines in the determination at the Step S119 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “low”, namely when it determines that the strength of the current additive is “medium” (Step S119: No), it determines in the history up to now whether or not it has ever tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, namely, it determines whether or not it has ever tried the composition having the addition amount increased and the strength set to “low” (Step S121). Similar to the above, this determination is also used to select a more optimal functional additive based on the balance between cost and effectiveness while avoiding the use of the additive with a higher unit price, for example, when the functional additive with a “medium” strength is relatively expensive as compared to those with a “low” strength.

[0248] When the composition determination apparatus 5 determines that, in the history up to now, it has tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, that is, when it determines that it has tried to increase the addition amount relative to the current composition while setting the strength at “low” (Step S121: Yes), it determines that the present composition is optimal; then, it determines to make “no change” in both the strength and the addition amount of the functional additive, and thereby outputting the control recipe R in accordance with this determined result (Step S122); and with this, this process is terminated.

[0249] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation is produced with the same composition as before. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the way as described above, the composition determination apparatus 5 can control so as to maintain the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5.

[0250] At the determination Step S121, when the composition determination apparatus 5 determines that in the history up to now, it has never tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, that is, when it determines that the composition having the addition amount increased while setting the strength at “low” has never been tried (Step S121: No), then in the composition of the industrial oil composition C1 after reclamation to be produced next time, it determines that the strength of the functional additive is set to “−1” (i.e., “low”) relative to the current strength and the addition amount to “+1” relative to the current addition amount, and thereby outputting the control recipe R in accordance with this determination result (Step S123); and with this, this process is terminated.

[0251] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, by determining the composition of the industrial oil composition C1 after reclamation in the way as described above, the composition determination apparatus 5 can try the composition that maintains the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5, while avoiding the use of a relatively expensive functional additive thereby relatively lowering the total cost.

[0252] When the composition determination apparatus 5 determines in the determination of the Step S113 that the consumption of the functional additive in the industrial oil composition C1 after use is not in the state of 85% or more and less than 100%, that is, the consumption of the functional additive is less than 85% (Step S113: No), it determines whether or not the impurity components in the industrial oil composition C1 after use is more than a prescribed percentage, in this case 5% or more, as illustrated in FIG. 17 (Step S124).

[0253] When the composition determination apparatus 5 determines that the impurity components in the industrial oil composition C1 after use is 5% or more (Step S124: Yes), it determines that the industrial oil composition C1 after use is in the “state that the functional additive is wasted” as illustrated in FIG. 7 (Step S125).

[0254] Next, the composition determination apparatus 5 determines whether the strength of the current functional additive added to the industrial oil composition C1 after use in question is “low” or not (Step S126).

[0255] When the composition determination apparatus 5 determines that the current strength of the functional additive added to the industrial oil composition C1 after use is “low” (Step S126: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is “no change” from the current strength, and the addition amount thereof is determined to be “−2” relative to the current addition amount, thereby outputting the control recipe R in accordance with this determined result (Step S127); and with this, this process is terminated. Here, “−2” relative to the current addition amount corresponds to reducing the addition amount by, for example, an approximately 20% by mass relative to the current addition amount (the same applies below).

[0256] The production apparatus 1 then produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 based on this control recipe R. As a result, the industrial oil composition C1 after reclamation has a relatively smaller addition amount of the functional additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In other words, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5 from the quality corresponding to the “state that the functional additive is wasted” as illustrated in FIG. 7; with this, the functional additive that is wasted without being consumed may be reduced. Here, the composition determination apparatus 5 can shorten the number of trials until optimization by significantly changing the amount of the functional additives in two stages by setting the addition amount of the functional additive to “−2” relative to the current addition amount.

[0257] When the composition determination apparatus 5 determines at the determination of Step S126 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “low” (Step S126: No), it determines whether the strength of the current functional additive added to the industrial oil composition C1 after use is “high” or not (Step S128).

[0258] When the composition determination apparatus 5 determines that the strength of the current functional additive added to the industrial oil composition C1 after use is “high” (Step S128: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is set “−2” (i.e., “low”) relative to the current strength, and the addition amount thereof is set “no change” from the current addition amount, and thereby outputting the control recipe R in accordance with the result of this determination (Step S129); and with this, this process is terminated.

[0259] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively lower strength of the functional additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5, from the quality corresponding to the “state that the functional additive is wasted” as illustrated in FIG. 7; with this, the functional additive that is wasted without being consumed may be reduced. Here, the composition determination apparatus 5 can shorten the number of trials until optimization by significantly changing the strength of the functional additive in two stages by setting it to “−2” relative to the current strength. Also here, in controlling the functional additive, for example, the strength of the functional additive is controlled with the priority given to avoiding the use of the additive whose unit price is relatively high.

[0260] When the composition determination apparatus 5 determines in the determination Step S128 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “high”, that is, the strength of the current functional additive is “medium” (Step S128: No), in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is determined to be “−1” (i.e., “low”) relative to the current strength, and the addition amount to be “−1” relative to the current addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S130); and with this, this process is terminated. Here, “−1” relative to the current addition amount corresponds to reducing the addition amount by, for example, an approximately 10% by mass relative to the current addition amount (the same applies below).

[0261] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively lower strength of functional additive and a relatively smaller amount of the additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5, from the quality corresponding to the “state that the functional additive is wasted” as illustrated in FIG. 7; with this, the functional additive that is wasted without being consumed may be reduced.

[0262] When the composition determination apparatus 5 determines at the determination Step S124 that the impurity components in the industrial oil composition C1 after use is less than 5% (Step S124: No), it determines that the industrial oil composition C1 after use is in the “state in which there is some room for improvement relative to the standard state”, as illustrated in FIG. 6 (Step S131).

[0263] Next, the composition determination apparatus 5 determines whether the strength of the current functional additive added to the industrial oil composition C1 after use in question is “low” or not (Step S132).

[0264] When the composition determination apparatus 5 determines that the current strength of the functional additive added to the industrial oil composition C1 after use is “low” (Step S132: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is “no change” from the current strength, and the addition amount thereof is determined to be “−1” relative to the current addition amount, thereby outputting the control recipe R in accordance with this determined result (Step S133); and with this, this process is terminated.

[0265] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively smaller addition amount of the functional additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In other words, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5 from the quality corresponding to the “state in which there is some room for improvement relative to the standard state”, as illustrated in FIG. 6; with this, the functional additive that is wasted without being consumed may be further reduced.

[0266] When the composition determination apparatus 5 determines at the determination Step S132 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “low”, that is, the strength of the functional additive is “high” or “medium” (Step S132: No), in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is determined to be “−1” (i.e., “medium” or “low”) relative to the current strength and the addition amount to be “no change” from the current addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S134); and with this, this process is terminated. Then, in the same manner as above, based on this

[0267] control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively lower strength of the functional additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5 from the quality corresponding to the “state in which there is some room for improvement relative to the standard state”, as illustrated in FIG. 6; with this, the functional additive that is wasted without being consumed may be further reduced.

[0268] Here, in controlling the functional additive, for example, the strength of the functional additive is controlled with the priority given to avoiding the use of the additive whose unit price is relatively high.

[0269] The control system Sys1 for circulation and reclamation of the industrial oil controls the quality of the industrial oil composition C1 that is circulated and reclaimed in the system as described above so that the base oil in the reclaimed oil composition C2 that is circulated and reclaimed in the system may be prevented from being damaged thereby allowing proper protection, and on top of it, the functional additive in the industrial oil composition C1 may be prevented from being wasted without being used. In other words, with the control system Sys1 for circulation and reclamation of the industrial oil, it is possible to compatibly achieve in good balance both the protection of the reclaimed oil composition C2 containing the base oil and the suppression of the waste of the functional additive.

[0270] As a result, the control system Sys1 for circulation and reclamation of the industrial oil can contribute to the real world not only in terms of CO2 reduction and carbon neutrality, but also in terms of so-called SDGs, an environmental load reduction, and a circular economy.

[0271] For example, when the control system Sys1 for circulation and reclamation of the industrial oil performs a fixed-rate lubrication control service and the like on a monthly or yearly basis by so-called subscription or the like, using said system that can stably circulate and reclaim the reclaimed oil composition C2 containing the base oil, it is possible to improve the satisfaction level of customers enjoying this service. In other words, by controlling the quality of the industrial oil composition C1 after use in the way as described above, the control system Sys1 for circulation and reclamation of the industrial oil can suppress, for example, an excessive use of the industrial oil composition C1 in the industrial oil use apparatus 2 and, conversely, a wasteful replacement of the industrial oil composition C1 in the industrial oil composition C1. With this, the control system Sys1 for circulation and reclamation of the industrial oil can compatibly satisfy, for example, both the sure protection of the industrial oil use apparatus 2 and the suppression of the decrease in the operation rate of the industrial oil use apparatus 2, thereby allowing to improve the satisfaction of the customers who enjoy this service. The control system Sys1 for circulation and reclamation of the industrial oil can also prevent, for example, the situation in which the functional additive provided as the chargeable consumer good in the service is hardly consumed in spite of the fact that the customer has paid a fixed fee for this service, thereby suppressing the decline in customer satisfaction. In other words, the control system Sys1 for circulation and reclamation of the industrial oil can not only properly protect the base oil contained in the reclaimed oil composition C2 at the time when the pre-assumed use period has passed, but can also achieve both the waste control of the functional additive and the improved customer satisfaction by ensuring that the functional additive is consumed in a proper amount.<Composition Determination and Control of the Industrial Oil Composition: Specific Example 2 of Composition Determination and Control>

[0272] The specific example 2, illustrated in FIG. 18 through FIG. 19, describes a control example of the circulation and reclamation cycle of the reclaimed oil composition C2. In other words, in this specific example 2, the control of the industrial oil composition C1 includes the control of circulation and reclamation cycle of the reclaimed oil composition C2.

[0273] In this case, at the composition determination step (Step S9), in determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 controls the circulation and reclamation cycle of the reclaimed oil composition C2 by controlling the functional additive to be added to the reclaimed oil composition C2. In other words, in this specific example 2, the object to be controlled by the composition control of the industrial oil composition

[0274] C1 after reclamation by means of the composition determination apparatus 5 is the circulation and reclamation cycle of the reclaimed oil composition C2 that is circulated and reclaimed in this system. Here, the composition determination apparatus 5 controls the functional additive to be added to the reclaimed oil composition C2 thereby controlling the service life of the industrial oil composition C1 after reclamation; this means that it also controls the circulation and reclamation cycle itself of the industrial oil composition C1 and the reclaimed oil composition C2.

[0275] More specifically, at the composition determination step (Step S9), the composition determination apparatus 5 controls and determines the composition of the industrial oil composition C1 after reclamation by controlling the strength or the addition amount of the functional additive so that the service life of the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2 will become the prescribed period. The composition determination apparatus 5 then outputs the control recipe R in accordance with this determined composition. In other words, the composition determination apparatus 5 outputs this control recipe R by changing the composition of the industrial oil composition C1 after reclamation to be produced by the production apparatus 1 in accordance with the prescribed service life of the industrial oil composition C1. The production apparatus 1 then produces the industrial oil composition C1 after reclamation based on this control recipe R. In this way, the composition determination apparatus 5 optimizes the service life of the industrial oil composition C1 after reclamation as desired, and thus optimizes the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2.

[0276] The prescribed service life of the industrial oil composition C1 after reclamation in the cycle control of the reclaimed oil composition C2 may be set as appropriate in accordance with, for example, the circulation and reclamation status of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system and the operating status and operation prediction of the entire control system Sys1 for circulation and reclamation of the industrial oil. In other words, the composition determination apparatus 5 controls the service life of the industrial oil composition C1 after reclamation so that the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2 is optimized in accordance with the circulation and reclamation status of the industrial oil composition C1 and the reclaimed oil composition C2, the operating status of the entire control system Sys1 for circulation and reclamation, and the operation prediction, among other things. In other words, in the control system Sys1 for circulation and reclamation of the industrial oil, the composition determination apparatus 5 controls, for example, the strength and addition amount of the functional additive to be added to the industrial oil composition C1 with the goal to optimize the circulation and reclamation cycle so that the industrial oil composition C1 and the reclaimed oil composition C2 are efficiently circulated and reclaimed without problems, and thereby controlling the service life of the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2.

[0277] When the service life of the industrial oil composition C1 after reclamation is made relatively long so that the service life thereof will become the prescribed period, the composition determination apparatus 5 makes the strength of the functional additive relatively high or the addition amount of the functional additive relatively large in the determination of the composition of the industrial oil composition C1 after reclamation. On the other hand, when the service life of the industrial oil composition C1 after reclamation is made relatively short so that the service life thereof will become the prescribed period, the composition determination apparatus 5 makes the strength of the functional additive relatively low or the addition amount of the functional additive relatively small in the determination of the composition of the industrial oil composition C1 after reclamation.

[0278] For example, when the control of the circulation and reclamation cycle of the reclaimed oil composition C2 illustrated in this specific example 2 is applied to the control system Sys1 for circulation and reclamation of the industrial oil having a plurality of the production apparatuses 1, the industrial oil use apparatuses 2, and the reclamation apparatuses 4, as illustrated in FIG. 18, the multiple circulation and reclamation cycles in these units are bundled together for a group control; with this, the entire system may be efficiently controlled. In this case, the composition determination apparatus 5 may control separately for each of multiple industrial oil use apparatuses 2 the composition of the industrial oil composition C1 after reclamation that is going to be re-used in these industrial oil use apparatuses 2. In other words, the composition determination apparatus 5 controls separately for each of the multiple industrial oil use apparatuses 2 the service life of the industrial oil composition C1 used in these industrial oil use apparatuses 2; with this, the circulation and reclamation cycles of the industrial oil composition C1 and the reclaimed oil composition C2 in the entire system are bundled and controlled for optimization as a whole.

[0279] Here, at the composition determination step (Step S9), as illustrated in FIG. 19, the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2, based on, in addition to the analysis results by the analysis apparatus 3 at the analysis step (Step S5) described above, the circulation and reclamation state of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, and various indicators for the operating status and operation prediction in the entire control system Sys1 for circulation and reclamation of the industrial oil.

[0280] More specifically, the composition is determined based on the circulation and reclamation state of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, and various indicators for the operating status and operation prediction in the entire control system Sys1 for circulation and reclamation of the industrial oil; examples of such indicator include the total circulation amount of the reclaimed oil composition C2, the deterioration trend of the industrial oil composition C1 caused by the use in the industrial oil use apparatus 2, the operation status of each industrial oil use apparatus 2, the operation prediction of each industrial oil use apparatus 2, the reclamation capacity of each reclamation apparatus 4, the operation rate of each reclamation apparatus 4, the production capacity of each production apparatus 1, the operation rate of each production apparatus 1, the transportation capacity of each transport carrier 6, the operation rate of each transport carrier 6, the storage capacity of each storage facility 7, and the operation rate of each storage facility 7.

[0281] In other words, in this case, at the composition determination step (Step S9), the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2, based on at least one of the following information: the result of the analysis by the analysis apparatus 3, the total circulation amount of the reclaimed oil composition C2, the deterioration trend of the industrial oil composition C1 caused by the use in the industrial oil use apparatus 2, the operation status of each industrial oil use apparatus 2, the operation prediction of each industrial oil use apparatus 2, the reclamation capacity of each reclamation apparatus 4, the operation rate of each reclamation apparatus 4, the production capacity of each production apparatus 1, the operation rate of each production apparatus 1, the transportation capacity of each transport carrier 6, the operation rate of each transport carrier 6, the storage capacity of each storage facility 7, and the operation rate of each storage facility 7. These indicators, for example, may be input to the composition determination apparatus 5 via the data input / output component of the data sensed at each unit, or they may be input to the composition determination apparatus 5 by operation of a worker via the operation input component. Based on these various indicators, the composition determination apparatus 5 monitors the entire control system Sys1 for circulation and reclamation of the industrial oil and the circulation and reclamation cycle of the industrial oil composition C1 and reclaimed oil composition C2, determines the composition of the industrial oil composition C1 after reclamation so that the circulation and reclamation cycle will be properly performed and the entire system operates efficiently, and controls the service life of the industrial oil composition C1.

[0282] Here, the total circulation amount of the reclaimed oil composition C2 is an indicator corresponding to the total amount of the reclaimed oil composition C2 that is circulated and reclaimed in the control system Sys1 for circulation and reclamation of the industrial oil. Typically, the composition determination apparatus 5 may determine the composition of the industrial oil composition

[0283] C1 after reclamation in accordance with the total circulated amount of the reclaimed oil composition C2 and control the service life of this industrial oil composition C1 so as to avoid a shortage or, conversely, an oversupply of the reclaimed oil composition C2, which is the raw material for the industrial oil composition C1 after reclamation. For example, when the total circulation amount of the reclaimed oil composition C2 is relatively small, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation will be relatively longer.

[0284] On the other hand, when the total circulation amount of the reclaimed oil composition C2 is relatively large, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation will be relatively shorter. This allows the composition determination apparatus 5 to control in accordance with the total circulation amount of the reclaimed oil composition C2.

[0285] The deterioration trend of the industrial oil composition C1 caused by the use in the industrial oil use apparatus 2 is typically an indicator in accordance with the degradation trend of the industrial oil composition C1, which can be ascertained by repeating multiple analyses of the industrial oil composition C1 after use in a particular industrial oil use apparatus 2. When the composition determination apparatus 5 is able to grasp the degradation trend of the industrial oil composition C1 used in the particular industrial oil use apparatus 2, it may determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the particular industrial oil use apparatus 2 in accordance with this degradation trend, and thereby controlling the service life of this industrial oil composition C1. This allows the composition determination apparatus 5 to control in accordance with the degradation trend of the industrial oil composition C1.

[0286] The operation status of the industrial oil use apparatus 2 is typically the operating condition of the industrial oil use apparatus 2 that uses the industrial oil composition C1. Examples of the condition include indicators with regard to operation environment of the industrial oil composition C1 (temperature and location of the installation, etc.), operation load and period in production of various products, various machining processing, and various equipment operations, among others, using the industrial oil composition C1. The operation prediction of the industrial oil use apparatus 2 is typically an indicator in accordance with the future demand prediction (e.g., prediction of increase or decrease in production) for production of various products, various machining processing, and various equipment operations, among others, conducted by the industrial oil use apparatus 2. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the operation status and operation prediction of the industrial oil use apparatus 2, and control the service life of said industrial oil composition C1. For example, when the operation of the industrial oil use apparatus 2 is expected to be relatively increased due to increase in demand, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation so that the service life of said industrial oil composition C1 will be relatively longer during production increase and peak demand period in order to minimize interruption of operation due to replacement work. On the other hand, when demand is expected to be decreased and the operation rate of the industrial oil use apparatus 2 is relatively low, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively shorter during reduced production and off-peak period. This allows the composition determination apparatus 5 to control the industrial oil use apparatus 2 in accordance with its operating status and operation prediction.

[0287] The reclamation capacity of the reclamation apparatus 4 is typically the indicator corresponding to the maximum amount of the reclaimed oil composition C2 that can be reclaimed per unit time in the reclamation apparatus 4, in other words, this is the reclamation capacity of the reclamation apparatus 4. The operation rate of the reclamation apparatus 4 is typically the indicator based on the ratio of the amount of the reclaimed oil composition C2 that is actually reclaimed to the maximum amount of the reclaimed oil composition C2 that can be reclaimed per unit time in the reclamation apparatus 4; in other words, this is the indicator that indicates how much of the reclamation capacity of the reclamation apparatus 4 is being used. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the reclamation capacity and operation rate of the reclamation apparatus 4, and then control the service life of said industrial oil composition C1. For example, when the operation rate of the reclamation apparatus 4 is relatively high and the reclamation capacity of the reclamation apparatus 4 has a little room, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively long so that the industrial oil composition C1 after use that is waiting for reclamation does not stagnate. On the other hand, when the operation rate of the reclamation apparatus 4 is relatively low and there is a sufficient room in the reclamation capacity of the reclamation apparatus 4, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively short. This allows the composition determination apparatus 5 to control in accordance with the reclamation capacity and operation rate of the reclamation apparatus 4.

[0288] The production capacity of the production apparatus 1 is typically the indicator in accordance with the maximum amount of the industrial oil composition C1 that can be produced per unit time in the production apparatus 1, in other words, this is the production capacity of the production apparatus 1. The operation rate of the production apparatus 1 is typically the indicator corresponding to the ratio of the amount of the industrial oil composition C1 actually produced to the maximum amount of the industrial oil composition C1 that can be produced per unit of time in the production apparatus 1, in other words, this is the indicator that indicates how much of the production capacity of the production apparatus 1 is being used. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the production capacity and operation rate of the production apparatus 1, and then control the service life of said industrial oil composition C1. For example, when the operation rate of the production apparatus 1 is relatively high and the production capacity of the production apparatus 1 has a little room, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively long so that the demand thereof is not excessive relative to the production supply of the industrial oil composition C1. On the other hand, when the operation rate of the production apparatus 1 is relatively low and there is a sufficient room in the production capacity of the production apparatus 1, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively short. This allows the composition determination apparatus 5 to control in accordance with the production capacity and operation rate of the production apparatus 1.

[0289] The transport capacity of the transport carrier 6 is typically the indicator corresponding to the maximum amount of the industrial oil composition C1 that can be transported per unit time in the transport carrier 6, in other words, this is the transport capacity of the transport carrier 6. The operation rate of the transport carrier 6 is typically the indicator corresponding to the ratio of the amount of industrial oil composition C1 actually transported to the maximum amount of the industrial oil composition C1 that can be transported per unit time in the transport carrier 6, in other words, this is the indicator of how much of the transport capacity of the transport carrier 6 is being used. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the transport capacity and operation rate of the transport carrier 6, and then control the service life of said industrial oil composition C1. For example, when the operation rate of the transport carrier 6 is relatively high and there is a little room in the transportation capacity of the transport carrier 6, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively long so that there is no delay in transporting the industrial oil composition C1 or the reclaimed oil composition C2. On the other hand, when the operation rate of the transport carrier 6 is relatively low and there is a sufficient room in the transport capacity of the transport carrier 6, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively short. This allows the composition determination apparatus 5 to control in accordance with the transport capacity and operation rate of the transport carrier 6.

[0290] The storage capacity of the storage facility 7 is typically the indicator corresponding to the maximum amount of the industrial oil composition C1 and the reclaimed oil composition C2 that can be stored in the storage facility 7, that is, the storage capacity of the storage facility 7. The operation rate of the storage facility 7 is typically the indicator corresponding to the ratio of the amount of the industrial oil composition C1 and the reclaimed oil composition C2 actually stored to the maximum amount of the industrial oil composition C1 and the reclaimed oil composition C2 that can be stored in the storage facility 7, in other words, this is an indicator of how much of the storage capacity of the storage facility 7 is being used. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the storage capacity and operation rate of the storage facility 7, and then control the service life of said industrial oil composition C1. For example, when the operation rate of the storage facility 7 is relatively high and there is a little room in the storage capacity of the storage facility 7, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively long to avoid excess industrial oil composition C1 and reclaimed oil composition C2 in the unused state. On the other hand, when the operation rate of the storage facility 7 is relatively low and there is a sufficient room in the storage capacity of the storage facility 7, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively short. This allows the composition determination apparatus 5 to control in accordance with the storage capacity and operation rate of the storage facility 7.

[0291] The composition determination apparatus 5 typically determines the composition of the industrial oil composition C1 after reclamation and controls the circulation and reclamation cycle of the reclaimed oil composition C2 so that the service life of the industrial oil composition C1 after reclamation becomes the prescribed period by taking into account the aforementioned trend based on the aforementioned various indicators and balancing them comprehensively.

[0292] The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation and control the circulation and reclamation cycle of the reclaimed oil composition C2 so that the service life of the industrial oil composition C1 after reclamation becomes the prescribed period, using techniques related to Artificial Intelligence and Deep Learning, for example.

[0293] In this case, the composition determination apparatus 5 may, for example, store a learned model M to be used for determining the composition of the industrial oil composition C1 after reclamation in the memory component in advance, and then determine based on this learned model M the composition of the industrial oil composition C1 after reclamation in accordance with aforementioned various indicators, and then perform the control so as to be in accordance with the situation indicated by these various indicators.

[0294] Here, the learned model M is typically a learned mathematical model that determines, based on the aforementioned various indicators, the composition of the industrial oil composition C1 for optimal control under the situation indicated by these various indicators. In other words, the learned model M is the model with the input: “the analysis results by the analysis apparatus 3, the total circulating amount of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1, the operation status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity of the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1, the operation rate of the production apparatus 1, the transport capacity of the transport carrier 6, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7, and the operation rate of the storage facility 7”, and the output: “the composition of the industrial oil composition C1 in order to perform an optimal control under the situation indicated by the aforementioned various indicators”.

[0295] In this case, for example, the control system Sys1 for circulation and reclamation of the industrial oil collects in advance the input: “the analysis results by the analysis apparatus 3, the total circulating volume of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1, the operation status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity of the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1, the operation rate of the production apparatus 1, the transport capacity of the transport carrier 6, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7, and the operation rate of the storage facility 7”, and the output: “the composition of the industrial oil composition C1 in order to perform an optimal control under the situation indicated by the aforementioned various indicators”, and then uses the data obtained by quantifying the above-mentioned input as the explanatory variables and the data obtained by quantifying the above-mentioned output as the objective variables, and further prepares a number of teacher data sets for learning by associating these data, and thereby performing machine learning using these teacher data sets for learning to generate the learned model M. Various forms of algorithms applicable to this form of learning may be used as the machine learning, such as deep learning, neural networks, random forests, logistic regression, ensemble learning, support vector machines, and naïve Bayes. The composition determination apparatus 5 stores the learned model M obtained by this machine learning in the memory component in advance.

[0296] The composition determination apparatus 5 then determines the composition of the industrial oil composition C1 after reclamation based on the learned model M that is stored in the memory component, and outputs the control recipe R. More specifically, the composition determination apparatus 5 actually inputs into the learned model M the quantified data of the analysis results by the analysis apparatus 3, the total circulating amount of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1, the operation status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity of the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1, the operation rate of the production apparatus 1, the transport capacity of the transport carrier 6, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7, and the operation rate of the storage facility 7. With this, from the learned model M the composition determination apparatus 5 outputs the composition of the industrial oil composition C1 for optimal control in the situation indicated by the aforementioned various indicators to determine the composition of the industrial oil composition C1 after reclamation.

[0297] In this way, the composition determination apparatus 5 determines based on the aforementioned various indicators the composition of the industrial oil composition C1 after reclamation so that the service life of the industrial oil composition C1 after reclamation becomes the prescribed period, and thereby allowing to control the circulation and reclamation cycle of the reclaimed oil composition C2 as well.

[0298] The control system Sys1 for circulation and reclamation of the industrial oil controls the service life of the industrial oil composition C1 that is circulated and reclaimed in the system in the way as described above, and thereby controls the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2; and with this, the entire system can be operated efficiently by optimizing the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2 in accordance with the conditions of the entire system.

[0299] As a result, the control system Sys1 for circulation and reclamation of the industrial oil can contribute to the real world not only in terms of CO2 reduction and carbon neutrality, but also in terms of so-called SDGs, an environmental load reduction, and a circular economy.

[0300] For example, when the control system Sys1 for circulation and reclamation of the industrial oil controls by means of the group control the service life of the industrial oil composition C1 by bundling the circulation and reclamation cycles together for multiple industrial oil use apparatuses 2, for example, the recovery timing to recover the industrial oil composition C1 after use from multiple industrial oil use apparatuses 2 in neighboring areas may be aligned. This allows the control system Sys1 for circulation and reclamation of the industrial oil, for example, to collect the industrial oil composition C1 after use from a plurality of the industrial oil use apparatuses 2 collectively by only one transport carrier 6, thereby improving the efficiency of transportation. In this case, the collection timing of the industrial oil composition C1 after use from the industrial oil use apparatus 2 can typically be any time within the service life of the industrial oil composition C1, but if the collection timing is too early for the service life, relatively more functional additive that is not consumed and wasted in the industrial oil composition C1 after use will remain. Therefore, it is preferable that the collection timing is somewhat closer to the end of the service life of the industrial oil composition C1. In contrast, the control system Sys1 for circulation and reclamation of the industrial oil controls the service life of the industrial oil composition C1 after reclamation by determining the composition of each industrial oil composition C1 so that the ends of service life of each industrial oil composition C1 to be used in multiple industrial oil use apparatuses 2, which are subject to collection of the industrial oil composition C1 after use in these multiple industrial oil use apparatuses 2 at the same time period, are aligned; then, this allows for improved transportation efficiency and reduced transportation load, as well as reduced waste of the functional additive.

[0301] On the other hand, the control system Sys1 for circulation and reclamation of the industrial oil can also control, for example, so as to dare to stagger the collection timing of the industrial oil composition C1 after use from multiple industrial oil use apparatuses 2. For example, depending on the operating conditions of the production apparatus 1, the reclamation apparatus 4, the transport carrier 6, and the storage facility 7, if the control system Sys1 for circulation and reclamation of the industrial oil collects the industrial oil composition C1 after use from multiple industrial oil use apparatuses 2 at once, the production apparatus 1, the reclamation apparatus 4, the transport carrier 6, the storage facility 7, and so forth will not be able to process it in time, which may cause a stagnation in the circulation and reclamation of the industrial oil composition C1 and the reclaimed oil composition C2. On the other hand, for example, under the situation where the operation rates of the production apparatus 1, the reclamation apparatus 4, the transport carrier 6, the storage facility 7, and so forth are relatively high, the control system Sys1 for circulation and reclamation of the industrial oil in this embodiment may determine the composition of each industrial oil composition C1 and control the service life of the industrial oil composition C1 after reclamation so that the collection timing of the industrial oil composition C1 after use from the multiple industrial oil use apparatuses 2 is intentionally dispersed; with this, it is possible to suppress the waste of the functional additive, and in addition, the entire system may be operated efficiently with preventing stagnation in the circulation and reclamation of the industrial oil composition C1 and the reclaimed oil composition C2.

[0302] When the control system Sys1 for circulation and reclamation of the industrial oil aligns or disperses the collection timing of the industrial oil composition C1 after use from the multiple industrial oil use apparatuses 2 as described above, it is also possible to control so that the service life of the industrial oil composition C1 is intentionally shortened. In any case, when the control system Sys1 for circulation and reclamation of the industrial oil controls separately for each of the multiple industrial oil use apparatuses 2 the service life of the industrial oil composition C1 that is used in these industrial oil use apparatuses 2, based on the operation rate of each unit and the balance between supply and demand of the industrial oil composition C1 and the reclaimed oil composition C2, it is possible to optimize the circulation and reclamation cycle in the entire system.

[0303] When the control system Sys1 for circulation and reclamation of the industrial oil controls the service life of the industrial oil composition C1 that is circulated and reclaimed in the system in the way as described above, and thereby controls the circulation and reclamation cycle of the industrial oil composition C1 and reclaimed oil composition C2, for example, the replacement timing of the industrial oil composition C1 and the like may be properly controlled and announced.

[0304] As a result, the control system Sys1 for circulation and reclamation of the industrial oil can, for example, provide a society with various public benefits, such as an overall system optimization, a circulation and reclamation cycle without interruption or stagnation, control of undersupply or oversupply of the industrial oil composition C1, control of excess recovery that does not match operation capacity, improvement of overall operation rate of the system, smooth and waste-free system operation, optimal operation of storage and transportation, reduction of transportation load, reduction of fossil fuel consumption, and improvement of corporate added value and corporate image through participation in efforts to reduce environmental impact.Action Effects of the Embodiment

[0305] The control system Sys1 for circulation and reclamation of the industrial oil described above is composed of: the industrial oil use apparatus 2 that uses the industrial oil composition C1 containing the base oil and the functional additive, the reclamation apparatus 4 that produces the reclaimed oil composition C2 containing the base oil from the industrial oil composition C1 after use that is recovered from the industrial oil use apparatus 2, the composition determination apparatus 5 that determines the composition of the industrial oil composition C1 after reclamation to be used in the industrial oil use apparatus 2, and the production apparatus 1 that produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 by adding the functional additive to the reclaimed oil composition C2 after reclamation based on the composition determined by the composition determination apparatus 5, in which at the time of determining the composition the composition determination apparatus 5 controls the industrial oil composition C1 that is circulated and reclaimed by controlling the functional additive to be added into the reclaimed oil composition C2.

[0306] The control method for circulation and reclamation of the industrial oil described above includes: the industrial oil use step (Step S3) at which the industrial oil composition C1 containing the base oil and the functional additive is used in the industrial oil use apparatus 2, the recovery step (Step S4) at which the industrial oil composition C1 after use is recovered from the industrial oil use apparatus 2, the reclamation step (Step S7) at which the reclaimed oil composition C2 containing the base oil is reclaimed from the recovered industrial oil composition C1 after use, the composition determination step (Step S9) at which the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is determined, the production step (Step S11) at which based on the composition determined at the composition determination step (S9), the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is produced by adding the functional additive to the reclaimed oil composition C2 after reclamation, and the industrial oil re-use step (Step S13) at which the industrial oil composition C1 after reclamation that is produced at the production step (Step S11) is re-used in the industrial oil use apparatus 2, in which at the composition determination step (Step S9), the industrial oil composition C1 that is circulated and reclaimed is controlled by controlling the functional additive to be added to the reclaimed oil composition C2 at the determination of the composition.

[0307] The control method for circulation and reclamation of the industrial oil described above includes: the recovery step (Step S4) at which the industrial oil composition C1 after use is recovered from the industrial oil use apparatus 2 that uses the industrial oil composition C1 containing the base oil and the functional additive, the reclamation step (Step S7) at which the reclaimed oil composition C2 containing the base oil is reclaimed from the recovered industrial oil composition C1 after use, the composition determination step (Step S9) at which the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is determined, and the production step (Step S11) at which the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is produced by adding the functional additive to the reclaimed oil composition C2 after reclamation based on the composition determined at the composition determination step (Step S9), in which at the composition determination step (Step S9), the industrial oil composition C1 that is going to be circulated and reclaimed is controlled by controlling the functional additive to be added to the reclaimed oil composition C2 at the determination of the composition.

[0308] With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can properly circulate and reclaim the industrial oil composition C1 that is used in the industrial oil use apparatus 2. As a result, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can contribute widely to the real world not only in terms of CO2 reduction and carbon neutrality, but also in terms of so-called SDGs, an environmental load reduction, and a circular economy.

[0309] The control system Sys1 for circulation and reclamation of the industrial oil described above may have the analysis apparatus 3 that analyzes the state of the recovered industrial oil composition C1 after use, and the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 based on the analysis results by the analysis apparatus 3. The control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above may also include the analysis step (Step S5) at which the state of the recovered industrial oil composition C1 after use is analyzed, and at the composition determination step (Step S9), based on the analysis results at the analysis step (Step S5), the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 may be determined. In this case, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can properly control the industrial oil composition C1 that is circulated and reclaimed in accordance with the analysis results of the actual industrial oil composition C1 after use.

[0310] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 based on at least one of the followings: the total circulating amount of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1 associated with the use in the industrial oil use apparatus 2, the operating status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity to reclaim the reclaimed oil composition C2 from the industrial oil composition C1 after use in the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1 that produces the industrial oil composition C1, the operation rate of the production apparatus 1, the transporting capacity of the transport carrier 6 that transports the industrial oil composition C1 or the reclaimed oil composition C2 among the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7 that stores the industrial oil composition C1 or the reclaimed oil composition C2, and the operation rate of the storage facility 7. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, at the composition determination step (Step S9), the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 may be determined based on at least one of the followings: the total circulating amount of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1 associated with the use in the industrial oil use apparatus 2, the operating status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity to reclaim the reclaimed oil composition C2 from the industrial oil composition C1 after use in the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1 that produces the industrial oil composition C1, the operation rate of the production apparatus 1, the transporting capacity of the transport carrier 6 that transports the industrial oil composition C1 or the reclaimed oil composition C2 among the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7 that stores the industrial oil composition C1 or the reclaimed oil composition C2, and the operation rate of the storage facility 7. In this case, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can properly control the industrial oil composition C1 that is circulated and reclaimed in accordance with the circulation and reclamation status of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, the operation status and operation prediction of the entire control system Sys1 for circulation and reclamation of the industrial oil, and the like, thereby allowing to efficiently operate the entire system through this control.

[0311] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the control of the industrial oil composition C1 includes control of the quality of the industrial oil composition C1 after use that has passed the pre-assumed use period, in which the composition determination apparatus 5, when determining the composition of the industrial oil composition C1 after reclamation, may control the quality of the industrial oil composition C1 after use that has passed the use period by adding the functional additive to the reclaimed oil composition C2. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, the control of the industrial oil composition C1 includes the control of the quality of the industrial oil composition C1 after use that has passed the pre-assumed use period; and at the composition determination step (Step S9), in determining the composition of the industrial oil composition C1 after reclamation, the quality of the industrial oil composition C1 after use that has passed the use period may be controlled by adding the functional additive to the reclaimed oil composition C2. In this case, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can control the quality of the industrial oil composition C1 after use that has passed the pre-assumed use period to an intended quality by controlling the functional additive that is added to the reclaimed oil composition C2 at the time when producing the industrial oil composition C1 after reclamation.

[0312] More specifically, in the control system Sys1 for circulation and reclamation of the industrial oil described above, the composition determination apparatus 5 controls the composition of the industrial oil composition C1 after reclamation so that the quality of the industrial oil composition C1 after use that has passed the use period becomes an intended quality. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, at the composition determination step (Step S9), the composition of the industrial oil composition C1 after reclamation is controlled so that the quality of the industrial oil composition C1 after use that has passed the use period becomes an intended quality. With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can compatibly achieve, for example, the protection of the reclaimed oil composition C2 containing the base oil and the waste control of the functional additive with good balance, as described above.

[0313] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the control of the industrial oil composition C1 includes the control of the circulation and reclamation cycle of the reclaimed oil composition C2 that is circulated and reclaimed; and when determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 may control the circulation and reclamation cycle of the reclaimed oil composition C2 by controlling the functional additive that is added to the reclaimed oil composition C2. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, the control of the industrial oil composition C1 includes the control of the circulation and reclamation cycle of the reclaimed oil composition C2 that is circulated and reclaimed; and in the composition determination step (Step S9), in determining the composition of the industrial oil composition C1 after reclamation, the circulation and reclamation cycle of the reclaimed oil composition C2 may be controlled by controlling the functional additive that is added to the reclaimed oil composition C2. In this case, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can optimally control the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2 in harmony with the circulation and reclamation state of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, the operation state of the entire control system Sys1 for circulation and reclamation of the industrial oil, and the like by controlling the functional additive to be added to the reclaimed oil composition C2 at the time when producing the industrial oil composition C1 after reclamation.

[0314] More specifically, in the control system Sys1 for circulation and reclamation of the industrial oil described above, the composition determination apparatus 5 controls the composition of the industrial oil composition C1 after reclamation so that the service life of the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2 will be the prescribed period. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, the composition of the industrial oil composition C1 after reclamation is controlled in the composition determination step (Step S9) so that the service life of the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2 becomes the prescribed period. With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can optimize the service life of the industrial oil composition C1 in accordance with the circulation and reclamation status of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, the operation status of the entire control system Sys1 for circulation and reclamation of the industrial oil, and the like; thus, for example, it is possible to control the recovery timing of the industrial oil composition C1 after use, improve the operation rate of each equipment, and optimize the supply-demand relationship of the industrial oil composition C1 and the reclaimed oil composition C2.

[0315] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the composition determination apparatus 5 separately controls for each of the multiple industrial oil use apparatuses 2 the composition of the industrial oil composition C1 after reclamation that is going to be re-used in these industrial oil use apparatuses 2. The control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above controls separately for each of the multiple industrial oil use apparatuses 2 at the composition determination step (Step S9) the composition of the industrial oil composition C1 after reclamation that is going to be re-used in these industrial oil use apparatuses 2. With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition control separately for each of the multiple industrial oil use apparatuses 2 the composition of the industrial oil composition C1 that is used in these industrial oil use apparatuses 2, thereby allowing to control the circulation and reclamation cycle of the industrial oil composition C1 that is used in the multiple industrial oil use apparatuses 2 by means of a group control; with this, the efficiency of the entire system can be properly improved.

[0316] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the industrial oil composition C1 includes a mineral oil (A1) or a synthetic oil (A2) as the base oil, a neutral phosphite derivative represented by the following formula (B) and a 2,6-di-t-butylphenol derivative represented by the following formula (C) as the antioxidant, and a functional additive; the reclamation apparatus 4 reclaims the reclaimed oil composition C2 containing the base oil from the industrial oil composition C1 after use by the refining treatment of the industrial oil composition C1 after use, in which as the refining treatment, adsorption, or hydrogenation desulfurization, or vacuum distillation is performed, the production apparatus 1 produces the industrial oil composition C1 after reclamation by adding the antioxidant and the functional additive to the reclaimed oil composition C2 after reclamation; and as compared to the industrial oil composition C1 before use in the industrial oil use apparatus 2, the content of the functional additive is lower in the industrial oil composition C1 after use. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, the industrial oil composition C1 includes the mineral oil (A1) or the synthetic oil (A2) as the base oil, the neutral phosphite derivative represented by the following formula (B) and the 2,6-di-t-butylphenol derivative represented by the following formula (C) as the antioxidant, and the functional additive; at the reclamation step (Step S7) the reclaimed oil composition C2 containing the base oil is reclaimed from the industrial oil composition C1 after use by the refining treatment of the industrial oil composition C1 after use, in which as the refining treatment, adsorption, or hydrogenation desulfurization, or vacuum distillation is performed; the production step (Step S11) includes the addition step at which the antioxidant and the functional additive are added to the reclaimed oil composition C2 after reclamation; and as compared to the industrial oil composition C1 before use in the industrial oil use apparatus 2, the content of the functional additive is lower in the industrial oil composition C1 after use. With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can use the reclaimed oil composition C2 not as the reclaimed industrial oil composition for fuel, but as the industrial oil composition C1 after reclamation for machine lubrication, metal processing, or the like in the industrial oil use apparatus 2; thus, this contributes to the CO2 reduction and to the carbon neutrality.(In the formula (B), Rb21 to Rb24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms, Rb25 to Rb28 each independently represent a linear or a branched alkyl group having 1 to 6 carbon atoms, Rb291 and Rb292 each independently represent a hydrogen atom, or a linear or a branched alkyl group having 1 to 5 carbon atoms, and a total number of carbon atoms of Rb291 and Rb292 is 1 to 5.)(In the formula (C), Rc1 represents a linear or a branched alkyl group having 1 to 12 carbon atoms.)MODIFIED EXAMPLESThe control method for circulation and reclamation of the industrial oil, the control system for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition according to the embodiment of the present invention are not limited to the above-described embodiments, and thus, various modifications are possible within the scope of the claims.In the above explanation, the control system Sys1 for circulation and reclamation of the industrial oil is described as having the production apparatus 1, the industrial oil use apparatus2, the analysis apparatus 3, the reclamation apparatus 4, the composition determination apparatus 5, the transport carrier 6, and the storage facility 7, but it is not limited to this; for example, it does not necessarily have the analysis apparatus 3, the transport carrier 6, the storage facility 7, or the like.In the above explanation, the industrial oil composition C1 is described as being used for machine lubrication or metal processing in the industrial oil use apparatus 2, but it is not limited to these and may be used for other purposes.

[0320] In the above explanation, typically, the recovery step (Step S4) is performed by the transport carrier 6 and the like, the reclamation step (Step S7) is performed by the reclamation apparatus 4, the composition determination step (Step S9) is performed by the composition determination apparatus 5, and the production step (Step S11) is performed by the production apparatus 1. However, this is not limited to these, and some or all of these steps may be performed manually. For example, the composition determination step (Step S9) may be performed without using the composition determination apparatus 5.

[0321] The industrial oil composition C1 described above is not limited to the above examples as far as it contains at least the base oil and the functional additive. In the above explanation, it is described in the way that the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition includes the analysis step (Step S5) for analyzing the state of the recovered industrial oil composition C1 after use, and at the composition determination step (Step S9), based on the analysis results in the analysis step (Step S5), the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is determined, but it is not limited to this. For example, when the degradation tendency of the industrial oil composition C1 after use in the specific industrial oil use apparatus 2 has been analyzed multiple times, and thereby the degradation tendency of the industrial oil composition C1 after use in the specific industrial oil use apparatus 2 is obtained, at the composition determination step (Step S9), the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the specific industrial oil use apparatus 2 may be determined in accordance with the obtained degradation tendency without analyzing each time the status of the industrial oil composition C1 after use and thereby it may be determined without using the analysis results.

[0322] In the above explanation, the composition determination apparatus 5 is described as controlling the strength of functional additives in 3 stages, the addition amount of the functional additive in 5 stages, and the combination of strength and addition amount in a total of 15 stages, but it is not limited to this; thus, the composition may be controlled without stages within the range described in the section <Industrial oil composition to be controlled>.

[0323] The control method for circulation and reclamation of the industrial oil, the control system for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition may be configured by combining as appropriate the configuration components of the embodiments and modifications described above.REFERENCE SIGNS LIST1 Production apparatus

[0325] 2 Industrial oil use apparatus

[0326] 3 Analysis apparatus

[0327] 4 Reclamation apparatus

[0328] 5 Composition determination apparatus

[0329] 6 Transport carrier

[0330] 7 Storage facility

[0331] C1 Industrial oil composition

[0332] C1a Analytical sample container / collection kit

[0333] C2 Reclaimed oil composition

[0334] M Learned model

[0335] P1 Production plant

[0336] P2 Use plant

[0337] P3 Reclamation plant

[0338] R Control recipe

[0339] Sys1 Control system for circulation and reclamation of industrial oil

Examples

embodiment

[0030]A control system Sys1 for circulation and reclamation of the industrial oil according to this embodiment illustrated in FIG. 1 has a production apparatus 1, an industrial oil use apparatus 2, an analysis apparatus 3, a reclamation apparatus 4, a composition determination apparatus 5, a transport carrier 6, and a storage facility 7. The control system Sys1 for circulation and reclamation of the industrial oil according to this embodiment constitutes the system that enables to properly circulate and reclaim an industrial oil composition C1 used in the industrial oil use apparatus 2 by making these units cooperate with each other.

[0031]Typically, the control system Sys1 for circulation and reclamation of the industrial oil uses in the industrial oil use apparatus 2 the industrial oil composition C1 produced by the production apparatus 1, and then recovers said industrial oil composition C1 after use and generates a reclaimed oil composition C2 by the reclamation apparatus 4. The ...

modified examples

The control method for circulation and reclamation of the industrial oil, the control system for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition according to the embodiment of the present invention are not limited to the above-described embodiments, and thus, various modifications are possible within the scope of the claims.

In the above explanation, the control system Sys1 for circulation and reclamation of the industrial oil is described as having the production apparatus 1, the industrial oil use apparatus2, the analysis apparatus 3, the reclamation apparatus 4, the composition determination apparatus 5, the transport carrier 6, and the storage facility 7, but it is not limited to this; for example, it does not necessarily have the analysis apparatus 3, the transport carrier 6, the storage facility 7, or the like.

In the above explanation, the industrial oil composition C1 is described as being used for machi...

FIELD

[0001] The present invention relates to a control method for circulation and reclamation of an industrial oil, a control system for circulation and reclamation of an industrial oil, and a production method for a reclaimed industrial oil composition.BACKGROUND

[0002] Patent Literature 1 describes a waste oil reclamation treatment system to obtain a reclaimed heavy oil from a waste oil, i.e., an industrial oil composition after use. Specifically, Patent Literature 1 describes a waste oil reclamation treatment system, having a step of removing impurities from a waste oil by centrifugal separation and a step of distillation at which the waste oil having the impurities removed is heated thereby further removing impurities mixed in the waste oil by evaporation to obtain a reclaimed heavy oil. The reclaimed heavy oil obtained here is used as a fuel oil.CITATION LISTPatent LiteraturePatent Literature 1: Japanese Patent Application Laid-open No. 2003-306682SUMMARYTechnical Problem

[0004] The waste oil circulation and reclamation treatment system described in this patent has problems, for example, among other things in terms of CO2 reduction, because the industrial oil composition after use is used as a fuel oil as described above, and in addition, there is room for further improvement in terms of social implementation of the circulation and reclamation technology for said industrial oil composition.

[0005] The present invention has been made in light of the above circumstances; thus, an object of the present invention is to provide a control method for circulation and reclamation of an industrial oil, a control system for circulation and reclamation of an industrial oil, and a production method for a reclaimed industrial oil composition, with which methods and system an industrial oil composition can be properly circulated and reclaimed.Solution to Problem

[0006] To achieve the above object, a control method for circulation and reclamation of an industrial oil according to the invention includes a recovery step at which from an industrial oil use apparatus that uses an industrial oil use apparatus that uses an industrial oil composition containing a base oil and a functional additive, the industrial oil composition after use is recovered; a reclamation step at which from the industrial oil composition after the use that is recovered, a reclaimed oil composition containing the base oil is reclaimed; a composition determination step at which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use unit is determined; and a production step at which based on the composition determined at the composition determination step, the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use unit is produced by adding the functional additive to the reclaimed oil composition after reclamation, wherein at the composition determination step, in determining the composition, the industrial oil composition that is circulated and reclaimed is controlled by controlling the functional additive that is added to the reclaimed oil composition.

[0007] To achieve the above object, a control system for circulation and reclamation of an industrial oil according to the invention includes a reclamation apparatus with which a reclaimed oil composition containing a base oil is reclaimed from an industrial oil composition after use comprising the base oil and a functional additive that is recovered from an industrial oil use apparatus that uses the industrial oil composition; a composition determination apparatus with which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is determined; and a production apparatus with which based on the composition determined by the composition determination apparatus, the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is produced by adding the functional additive to the reclaimed oil composition after reclamation, wherein the composition determination apparatus controls, in determining the composition, the industrial oil composition that is circulated and reclaimed by controlling the functional additive that is added to the reclaimed oil composition.

[0008] To achieve the above object, a production method for a reclaimed industrial oil composition according to the invention includes a recovery step at which from an industrial oil use apparatus that uses an industrial oil composition containing a base oil and a functional additive, the industrial oil composition after use is recovered; a reclamation step at which from the industrial oil composition after the use that is recovered, a reclaimed oil composition containing the base oil is reclaimed; a composition determination step at which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is determined; and a production step at which based on the composition determined at the composition determination step, the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use apparatus is produced by adding the functional additive to the reclaimed oil composition after reclamation, wherein at the composition determination step, in determination of the composition, the industrial oil composition that is circulated and reclaimed is controlled by controlling the functional additive that is added to the reclaimed oil composition.Advantageous Effects of Invention

[0009] According to the control method for circulation and reclamation of the industrial oil, the control system for circulation and reclamation of the industrial oil, and the production method for a reclaimed industrial oil composition according to the present invention, it is possible to properly circulate and reclaim an industrial oil composition.BRIEF DESCRIPTION OF DRAWINGS

[0010] FIG. 1 is a block diagram illustrating the schematic configuration of the control system for circulation and reclamation of the industrial oil according to the embodiment.

[0011] FIG. 2 is a schematic diagram illustrating the composition of the industrial oil composition according to the embodiment.

[0012] FIG. 3 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0013] FIG. 4 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0014] FIG. 5 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0015] FIG. 6 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0016] FIG. 7 is a schematic diagram illustrating one example of the composition of the industrial oil composition after use according to the embodiment.

[0017] FIG. 8 is a line diagram illustrating one example of the analysis (liquid chromatography) of the industrial oil composition after use according to the embodiment.

[0018] FIG. 9 is a line diagram illustrating one example of the analysis (liquid chromatography) of the industrial oil composition after use according to the embodiment.

[0019] FIG. 10 is a line diagram illustrating one example of the analysis (liquid chromatography) of the industrial oil composition after use according to the embodiment.

[0020] FIG. 11 is a line diagram illustrating another example of the analysis (infrared spectroscopy) of the industrial oil composition after use according to the embodiment.

[0021] FIG. 12 is a line diagram illustrating another example of the analysis (infrared spectroscopy) of the industrial oil composition after use according to the embodiment.

[0022] FIG. 13 is a diagram illustrating one example of the flow of each step in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0023] FIG. 14 is a schematic diagram illustrating one example of the functional additive that may be selected in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0024] FIG. 15 is a diagram illustrating one example of the flow of the composition determination steps in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0025] FIG. 16 is a diagram illustrating one example of the flow of the composition determination steps in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0026] FIG. 17 is a diagram illustrating one example of the flow of the composition determination steps in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0027] FIG. 18 is a diagram illustrating one example of the flow of each step in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.

[0028] FIG. 19 is a block diagram illustrating another example of the flow of the composition determination steps in the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition according to the embodiment.DESCRIPTION OF EMBODIMENTS

[0029] Hereinafter, the embodiments according to the present invention will be described specifically on the basis of the drawings. The present invention is not limited by the embodiments described below. Also, the components in the following embodiments include those that may be easily substitutable by those skilled in the art, or those that are substantially same.Embodiment<Outline of the Control System for Circulation and Reclamation of Industrial Oil>

[0030] A control system Sys1 for circulation and reclamation of the industrial oil according to this embodiment illustrated in FIG. 1 has a production apparatus 1, an industrial oil use apparatus 2, an analysis apparatus 3, a reclamation apparatus 4, a composition determination apparatus 5, a transport carrier 6, and a storage facility 7. The control system Sys1 for circulation and reclamation of the industrial oil according to this embodiment constitutes the system that enables to properly circulate and reclaim an industrial oil composition C1 used in the industrial oil use apparatus 2 by making these units cooperate with each other.

[0031] Typically, the control system Sys1 for circulation and reclamation of the industrial oil uses in the industrial oil use apparatus 2 the industrial oil composition C1 produced by the production apparatus 1, and then recovers said industrial oil composition C1 after use and generates a reclaimed oil composition C2 by the reclamation apparatus 4. The control system Sys1 for circulation and reclamation of the industrial oil then uses this reclaimed oil composition C2 as a raw material for production of the industrial oil composition C1 again by the production apparatus 1, and then re-uses the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2 thereby circulating and reclaiming the industrial oil composition C1. In other words, this control system Sys1 for circulation and reclamation of the industrial oil constitutes a so-called horizontal circulation system for the industrial oil composition C1. In this case, with the control system Sys1 for circulation and reclamation of the industrial oil, it is possible to properly control the industrial oil composition C1 that is circulated and reclaimed by controlling in accordance with the purpose in the composition determination apparatus 5 the composition of the industrial oil composition C1 after reclamation so as to be re-used in the industrial oil use apparatus 2.

[0032] Therefore, the control system Sys1 for circulation and reclamation of the industrial oil is for social implementation of the technology for reclamation, circulation, and control of the industrial oil composition C1 as described above, thereby realizing a system that widely contributes to a society, for example, not only in terms of CO2 reduction and carbon neutrality but also in terms of the so-called SDGs (Sustainable Development Goals), the reduction of an environmental load, and the circular economy.

[0033] Hereinafter, with reference to the drawings, it will be described in detail about each composition of the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil that is executed in the control system Sys1 for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition. In the following, first the industrial oil composition C1 to be controlled in the control system Sys1 for circulation and reclamation of the industrial oil will be outlined, which is then followed by a detailed description of each component and so forth of the control system Sys1 for circulation and reclamation of the industrial oil.<Industrial Oil Composition to be Controlled>

[0034] The industrial oil composition C1 to be controlled in the control system Sys1 for circulation and reclamation of the industrial oil includes a base oil and a functional additive that is added in accordance with the use in the industrial oil use apparatus 2. The industrial oil composition C1 is produced by the production apparatus 1 and used in the industrial oil use apparatus 2. The industrial oil composition C1 having been used in the industrial oil use apparatus 2 is recovered and reclaimed into the reclaimed oil composition C2 containing the base oil by the reclamation apparatus 4, and this reclaimed oil composition C2 is used again as a raw material for the industrial oil composition C1. During this time, the industrial oil composition C1 circulates while being transported in the control system Sys1 for circulation and reclamation of the industrial oil by means of the transport carrier 6 and the like among the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4, more specifically, among the locations where these units are installed (for example, among the production plant P1, the use plant P2, and the reclamation plant P3).

[0035] The industrial oil composition C1 of this embodiment is used as a so-called machine oil in the industrial oil use apparatus 2. As one example, the industrial oil composition C1 is described here as being used for machine lubrication or metal processing in the industrial oil use apparatus 2.

[0036] In the following description, the industrial oil composition C1 before it is used in the industrial oil use apparatus 2 is sometimes simply referred to as “industrial oil composition C1 before use”. Also, the industrial oil composition C1 before it is used for machine lubrication is sometimes referred to as “industrial oil composition C1 before use for machine lubrication”, and the industrial oil composition before it is used for metal processing is sometimes referred to as “industrial oil composition C1 before use for metal processing”. Similarly, the industrial oil composition C1 after it is used in the industrial oil use apparatus 2 is sometimes referred to as simply “industrial oil composition C1 after use”. Also, the industrial oil composition C1 after it is used for machine lubrication is sometimes referred to as “industrial oil composition C1 after use for machine lubrication”, and the industrial oil composition after it is used for metal processing is sometimes referred to as “industrial oil composition C1 after use for metal processing”. Also, the industrial oil composition C1 produced from the reclaimed oil composition C2 as the raw material is sometimes referred to as simply “industrial oil composition C1 after reclamation”.

[0037] More specifically, the industrial oil composition C1 before use contains a mineral oil (A1) or a synthetic oil (A2) as the base oil.

[0038] Specifically, examples of the mineral oil (A1) includes base oils belonging to Group 1, Group 2, and Group 3 in the base oil categories defined by the American Petroleum Institute (API). Examples of the base oil belonging to Group 1 include a base oil obtained by a solvent refining method. Examples of the base oil belonging to Group 2 include a base oil obtained by a hydrotreating method. Examples of the base oil belonging to Group 3 include a base oil obtained by a hydrocracking method. Specifically, examples of the synthetic oil (A2) includes base oils belong to Group 4 and Group 5 in the base oil categories defined by the American Petroleum Institute. Examples of the base oil belonging to Group 4 include polyalphaolefins (PAO) obtained by chemical synthesis. Base oils belonging to Group 5 and others include, for example, a vegetable oil, a hydrogenated vegetable oil, and their derivatives. The base oil may be used one kind alone of those described above or in a combination of two or more of them.

[0039] The industrial oil composition C1 before use contains a neutral phosphite ester derivative and a 2,6-di-t-butylphenol derivative, as the antioxidant.

[0040] The neutral phosphite ester derivative is represented by the following formula (B). The neutral phosphite ester derivative may be used one kind alone of those described above or in a combination of two or more of them. Because the neutral phosphite ester derivative is a dimer, this is less likely to evaporate and may efficiently exhibit an antioxidant performance.

[0041] In the formula (B), Rb21 to Rb24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms.

[0042] Each of the aliphatic hydrocarbon groups of 10 to 16 carbon atoms may be a linear, a branched, or a cyclic aliphatic hydrocarbon group, and may be a saturated or an unsaturated aliphatic hydrocarbon group. Specifically, examples of the aliphatic hydrocarbon group having 10 to 16 carbon atoms that may be preferably used include linear alkyl groups, such as a decyl group, an undecyl group, a dodecyl group, a tridecyl group, a tetradecyl group, a pentadecyl group, and a hexadecyl group (cetyl group).

[0043] Rb25 to Rb28 each independently represent a linear or a branched alkyl group having 1 to 6 carbon atoms.

[0044] Examples of the linear or the branched alkyl group having 1 to 6 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an n-hexyl group, an isopropyl group, a sec-butyl group, an isobutyl group, a t-butyl group, an isopentyl group, a t-pentyl group, a neopentyl group, and an isohexyl group.

[0045] Because the neutral phosphite ester has specified substituents in Rb25 to Rb28, the wear resistance, in addition to the antioxidant performance, is excellent. The reason for this improvement is believed to be because the film of the industrial oil composition C1 attached to a sliding part is made strong by the specified substituents in Rb25 to Rb28.

[0046] Especially when Rb25 and Rb27 each are a linear alkyl group having 1 to 6 carbon atoms, preferably 1 to 3 carbon atoms, and Rb26 and Rb28 each are a branched alkyl group having 3 to 6 carbon atoms, preferably 3 to 4 carbon atoms, the effect on improvement in the wear resistance is further enhanced.

[0047] Rb291 and Rb292 each independently represent a hydrogen atom, or a linear or a branched alkyl group having 1 to 5 carbon atoms.

[0048] Examples of the linear or the branched alkyl group having 1 to 5 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an isopropyl group, a sec-butyl group, an isobutyl group, a t-butyl group, an isopentyl group, a t-pentyl group, and a neopentyl group.

[0049] However, the total number of the carbon atoms in Rb291 and Rb292 is 1 to 5. Therefore, when Rb291 is, for example, a hydrogen atom, Rb292 is a linear or a branched alkyl group having 1 to 5 carbon atoms; when Rb291 is, for example, a methyl group, Rb292 is a linear or a branched alkyl group having 1 to 4 carbon atoms; and when Rb291 is, for example, an ethyl group, Rb292 is a linear or a branched alkyl group having 2 to 3 carbon atoms.

[0050] In order to strengthen a film of the industrial oil composition C1 furthermore, it is more preferable that Rb291 is a hydrogen atom and Rb292 is a linear or a branched alkyl group having 1 to 5 carbon atoms.

[0051] The 2,6-di-t-butylphenol derivative is represented by the following formula (C). The 2,6-di-t-butylphenol derivative may be used one kind alone or in a combination of two or more kinds thereof.

[0052] In the formula (C), Rc1 represents a linear or a branched alkyl group having 1 to 12 carbon atoms. Examples of the linear or branched alkyl group having 1 to 12 carbon atoms include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, a t-butyl group, an iso-butyl group, an n-pentyl group, an iso-pentyl group, a t-pentyl group, a neopentyl group, a hexyl group, a heptyl group, an iso-heptyl group, an n-octyl group, an iso-octyl group, a 2-ethylhexyl group, a nonyl group, and a decyl group. The alkyl groups described above improve the compatibility of the 2,6-di-t-butylphenol derivative.

[0053] In the industrial oil composition C1 before use, it is preferable that the neutral phosphite ester derivative is contained in an amount of 0.001 parts by mass or more and 6 parts by mass or less, relative to 100 parts by mass of the base oil. It is preferable that the 2,6-di-t-butylphenol derivative is contained in an amount of 0.001 parts by mass or more and 6 parts by mass or less, relative to 100 parts by mass of the base oil. When the antioxidant is contained in the amount described above, the antioxidant performance may be sustained for a long period of time.

[0054] Further, it is preferable that the industrial oil composition C1 before use further contains a hindered amine compound as the antioxidant.

[0055] The hindered amine compound is represented by the following formula (D). The hindered amine compound may be used one kind alone or in a combination of two or more kinds thereof.

[0056] Rd21 and Rd22 each independently represent an aliphatic hydrocarbon group having 1 to 10 carbon atoms.

[0057] Each of the aliphatic hydrocarbon groups having 1 to 10 carbon atoms may be a linear, a branched, or a cyclic aliphatic hydrocarbon group, and may be a saturated or an unsaturated aliphatic hydrocarbon group.

[0058] Specifically, examples of the aliphatic hydrocarbon group having 1 to 10 carbon atoms that may be preferably used include linear and branched alkyl groups, such as a methyl group, an ethyl group, an n-propyl group, an n-butyl group, an n-pentyl group, an n-hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an isopropyl group, a sec-butyl group, an isobutyl group, a t-butyl group, an isopentyl group, a t-pentyl group, a neopentyl group, an isohexyl group, and a 2-ethylhexyl group. Among these, linear and branched alkyl groups having 5 to 10 carbon atoms are more preferable from the viewpoint of enhanced durability.

[0059] Rd23 represents a divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms.

[0060] Examples of the divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms that may be preferably used include divalent linear and branched alkylene groups, such as a methylene group, a 1, 2-ethylene group, a 1, 3-propylene group, a 1, 4-butylene group, a 1, 5-pentylene group, a 1, 6-hexylene group, a 1, 7-heptylene group, a 1, 8-octylene group, a 1,9-nonylene group, a 1, 10-decylene group, and a 3-methyl-1,5-pentylene group. Among these, a divalent linear alkylene group or a branched alkylene group, having 5 to 10 carbon atoms, is more preferable from the viewpoint of enhanced durability.

[0061] Among the above groups, from the viewpoint of enhanced durability at a high temperature, the groups in which the total number of carbon atoms of Rd21, Rd22, and Rd23 is 16 to 30 are more preferable.

[0062] When the hindered amine compound is used in the industrial oil composition C1 before use, it is preferable that this is contained in an amount of 0.002 parts by mass or more and 5 parts by mass or less, relative to 100 parts by mass of the base oil.

[0063] Because the industrial oil composition C1 before use is used for machine lubrication or for metal processing, this further contains a functional additive. When the industrial oil composition C1 before use is used for machine lubrication, it is preferable to contain, along with the base oil and the antioxidants, an additional functional additive such as an oleaginous agent or a metal deactivator.

[0064] The oleaginous agent contained in the industrial oil composition C1 before use for machine lubrication may be a sulfur compound. For example, a zinc dialkyl dithiophosphate may be a good choice as the oleaginous agent. The presence of the zinc dialkyl dithiophosphate in the industrial oil composition C1 before use for machine lubrication improves a sliding property thereby preventing wearing even when used at a high temperature. As for the metal deactivator that is contained in the industrial oil composition C1 before use for machine lubrication, a benzotriazole derivative may be suitably used. The presence of the benzotriazole derivative in the industrial oil composition C1 before use for machine lubrication may protect a metal surface thereby preventing corrosion even when used at a high temperature. In the industrial oil composition C1 before use for machine lubrication, a combination of the oleaginous agent and the metal deactivator may lubricate a machine for a longer period of time.

[0065] Examples of the alkyl group possessed by the zinc dialkyl dithiophosphate include a primary alkyl group and a secondary alkyl group. Both the primary and secondary alkyl groups may be present in one molecule. The alkyl group may be linear or branched. There is no particular restriction in the number of carbon atoms in the alkyl group, but from the viewpoint of preventing wearing, the number of carbon atoms is preferably 3 to 12, and more preferably 3 to 8. The zinc dialkyl dithiophosphate may be used one kind alone or in a combination of two or more kinds thereof.

[0066] The benzotriazole derivative is preferably represented by the following formula (E). When the benzotriazole derivative like this is contained, corrosion may be further prevented even when used at a high temperature.

[0067] In the formula (E), Rc1 represents a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and Re2 and Re3 each independently represent an alkyl group having 1 to 18 carbon atoms. The benzotriazole derivative may be used one kind alone or in a combination of two or more kinds thereof.

[0068] In the industrial oil composition C1 before use for machine lubrication, it is preferable that the oleaginous agent is contained in an amount of 0.1 parts by mass or more and 5 parts by mass or less, relative to 100 parts by mass of the base oil. In the industrial oil composition before use for machine lubrication, it is preferable that the metal deactivator is contained in an amount of 0.01 parts by mass or more and 5 parts by mass or less, relative to 100 parts by mass of the base oil.

[0069] When the industrial oil composition C1 before use is used for metal processing, it is preferable to further contain, along with the base oil and the antioxidant, additional functional additives such as an extreme-pressure agent and a metal deactivator.

[0070] For example, as for the extreme-pressure agent that is contained in the industrial oil composition C1 before use for metal processing, a sulfur compound may be suitably used. Specifically, an example thereof is an active sulfur compound. The presence of the active sulfur compound in the industrial oil composition C1 before use for metal processing may improve processability even when used at a high temperature. As for the metal deactivator that is contained in the industrial oil composition C1 before use for metal processing, for example, a thiadiazole derivative may be suitably used. The presence of the thiadiazole derivative in the industrial oil composition before use for metal processing may protect a metal surface thereby preventing corrosion even when used at a high temperature. It also enables processing of a copper-based metal. In the industrial oil composition C1 before use for metal processing, a combination of the extreme-pressure agent and the metal deactivator allows metal processing for a longer period of time.

[0071] The active sulfur compound may be any compound as far as it contains an active sulfur in its molecule. The active sulfur compound refers to, for example, of the compounds containing a sulfur atom but no metal atom nor phosphorus atom, a compound exhibiting the copper plate corrosion of 2 to 4, as measured by the test method according to JIS K2513 (Petroleum Products-Corrosiveness to copper-Copper strip test; test tube method with heating at 100° C. for 1 hour), in which the compound diluted with a purified mineral oil to make a sulfur content of 1% by mass is tested. On the other hand, of the compounds that contain a sulfur atom but no metal atom nor phosphorus atom, a compound exhibiting the copper plate corrosion of 1 according to the above-mentioned test method is referred to as an inactive sulfur compound. Examples of the active sulfur compound include a polysulfide, a sulfide oil and fat, a powdered sulfur, a sulfide mineral oil, a sulfide ester, and a sulfide olefin. Among these, a sulfide olefin is preferably used. The active sulfur compound may be used one kind alone, or in a combination of two or more kinds thereof. There are compounds that may be inactive sulfur compounds depending on the production condition and other factors, even if raw materials and a sulfur content are similar to those of active sulfur compounds.

[0072] The thiadiazole derivative is preferably a 2,5-bis(alkyldithio)-1,3,4-thiadiazole, represented by the following formula (F). The presence of the thiadiazole derivative as described above provides a greater protection against the corrosion even when used at a high temperature.

[0073] In the above formula (F), Rf1 and Rf2 each independently represent an alkyl group having 1 to 20 carbon atoms, and a and b each independently represent 1, 2 or 3. The thiadiazole derivative may be used one kind alone, or in a combination of two or more kinds thereof.

[0074] In the industrial oil composition C1 before use for metal processing, it is preferable that the extreme-pressure agent is contained in an amount of 0.01 parts by mass or more and 10 parts by mass or less, relative to 100 parts by mass of the base oil. In the industrial oil composition C1 before use for metal processing, it is preferable that the metal deactivator is contained in an amount of 0.01 parts by mass or more and 10 parts by mass or less, relative to 100 parts by mass of the base oil.

[0075] When the industrial oil composition C1 before use for metal processing does not contain the metal deactivator, it may be suitably used for processing of a metal other than a copper-based metal, for example, an iron-containing metal. When the industrial oil composition C1 before use for metal processing does not contain the metal deactivator, the inactive sulfur compound may be used in place of the active sulfur compound, as the extreme-pressure agent.

[0076] The industrial oil composition C1 before use may further contain other functional additive. Examples of the other functional additive include a chlorinated paraffin.

[0077] It is preferable that the other functional additive is contained to the extent that it does not impair the long-term use effect of the industrial oil composition C1 before use.

[0078] The kinematic viscosity (JIS K 2283) at 40° C. of the industrial oil composition C1 before use for machine lubrication is preferably 15 cSt or more and 100 cSt or less, and more preferably 32 cSt or more and 68 cSt or less. Also, the kinematic viscosity (JIS K 2283) at 40° C. of the industrial oil composition C1 before use for metal processing is preferably 2 cSt or more and 40 cSt or less. In particular, the kinematic viscosity (JIS K 2283) at 40° C. of the industrial oil composition C1 before use for cutting processing is more preferably 10 cSt or more and 40 cSt or less.

[0079] When the industrial oil composition C1 before use is for machine lubrication, this may be used, with a publicly known method, as an oil such as a turbine oil, a hydraulic oil, a bearing oil, a gear oil, a compressor oil, or a traction oil. When the industrial oil composition C1 before use is for metal processing, this may be used, with a publicly known method, as an oil such as a cutting oil, a rolling oil, a pressed and drawing oil, a cleaning oil, a plastic processing oil, a punching oil, a heat treatment oil, or a thermal media oil. When used in the ways as described above, the industrial oil composition C1 before use will become the industrial oil composition C1 that has been used for machine lubrication or for metal processing.

[0080] The industrial oil composition C1 after use may be mixed with a flushing oil, which is used when replacing the industrial oil composition C1 that has been used for machine lubrication. Here, it is preferable that the flushing oil contains the base oil and antioxidant as described before.

[0081] In the industrial oil composition C1 after use, it is believed that most of the functional additives are usually consumed, as described in FIG. 2, for example. In addition, the industrial oil composition C1 after use usually contains altered components of the functional additive, the base oil, and the antioxidant, which have lost their functions due to degradation and compounding, among others, during the use thereof. In addition, the industrial oil composition C1 after use usually contains impurities such as metals, debris, and other solid components that have been formed and mixed during the use thereof. The industrial oil composition C1 after use is often colored in brown or other colors due to the presence of the altered components and impurities. In other words, the industrial oil composition C1 after use contains less functional additives than the industrial oil composition C1 before use in the industrial oil use apparatus 2. On the other hand, the industrial oil composition C1 after use usually contains also the base oil, the antioxidant, and the functional additives that remain in the same state as before use. The reason why the base oil and antioxidant are possible to remain at a high percentage in the industrial oil composition C1 after use is that the antioxidant itself has a high stability, and also that the antioxidant suppresses the alteration of the base oil.<Reclamation of the Reclaimed Oil Composition>

[0082] In the control system Sys1 for circulation and reclamation of the industrial oil in this embodiment, the reclaimed oil composition C2 containing the base oil is reclaimed from the industrial oil composition C1 after use by a refining step at which the industrial oil composition C1 after use as described above is refined (in other words, the reclaimed oil composition C2 is produced).<Reclamation of the Reclaimed Oil Composition: Reclamation Specific Example 1>

[0083] In this control system Sys1 for circulation and reclamation of the industrial oil, for example, an adsorption treatment may be performed as the refining process. In the specific example 1, the refining process, i.e., the adsorption treatment, is performed on the above-mentioned industrial oil composition C1 after use for machine lubrication or for metal processing at the refining step.

[0084] Examples of the adsorbent used for the adsorption treatment include an acidic white clay, an activated white clay, and a silica-magnesia type formulation. The acidic white clay is a clay composed of a clay mineral belonging to the montmorillonite group having a silica-alumina-silica trilayer structure and a soluble silicic acid as the main components. The activated white clay is obtained by treating a naturally occurring acidic white clay (montmorillonite clay) with a mineral acid such as sulfuric acid, and is a compound having a porous structure that has a large specific surface area and a high adsorption capacity. The activated white clay is preferably in a particulate form. The particle diameter of the activated white clay is preferably 0.1 μm or more and 100 μm or less, more preferably 10 μm or more and 50 μm or less, for example. The particle diameter of the activated white clay is the median diameter measured on a volume basis, using a laser diffraction and scattering method. The specific surface area of the activated white clay is preferably 1 m2 / g or more and 500 m2 / g or less, more preferably 50 m2 / g or more and 350 m2 / g or less. The specific surface area of the activated white clay is the value measured by the BET method. The silica-magnesia formulation contains a silica component and a magnesia component. In the silica-magnesia formulation, a magnesia component layer is sandwiched between silica component layers to form a tri-layered portion, which is encompassed by a matrix phase that is composed of silica particulates. It is possible that the adsorbent selectively adsorbs a substance having a polar group. From the viewpoint of a removal power of, among others, the altered components and impurities, the activated white clay and the silica-magnesia formulation are preferably used. The silica-magnesia formulation is more preferable because the use amount thereof may be lowered due to its high removal power of the altered components and impurities, among others. The adsorbent may be used one kind alone or in a combination of two or more kinds thereof.

[0085] At the time of the adsorption treatment, the industrial oil composition C1 after use is brought into contact with the adsorbent. With this, the adsorbent adsorbs the altered components and impurities contained in the industrial oil composition C1 after use, so that the altered components and impurities may be removed. Therefore, the degree of coloration is reduced in the reclaimed oil composition C2 obtained by the adsorbent treatment. It is believed that the adsorbent removes some of the impurities (sulfur-containing component) originally contained in the base oil, as well as the altered components that are formed from these impurities by use.

[0086] Specifically, in the adsorption treatment, the adsorbent is first added to the industrial oil composition C1 after use to obtain a mixture. In order to suitably remove the altered components and impurities, it is preferable that the adsorbent is allowed to be contacted in an amount of 10 parts by mass or more, more preferably in an amount of 10 parts by mass or more and 100 parts by mass or less, relative to 100 parts by mass of the industrial oil composition after use.

[0087] The resulting mixture is then stirred. Examples of the stirring method include stirring with a stirrer, with a propeller stirrer, with a planetary stirrer by revolving and orbiting, with stirring using a stirring rod, and with a continuous stirrer by flowing through a tube that induces stirring. The stirring time is sufficient as far as the conditions for the contact between the adsorbent and the industrial oil composition C1 after use in the mixture are fully satisfied, and thus it is preferably 5 minutes or longer. Stirring is conducted preferably at room temperature (e.g., 15° C.) or higher, more preferably 80° C. or higher and 130° C. or lower. When the temperature at which the stirring is conducted is too low, the viscosity may be too high, resulting in reduction of the stirring efficiency. On the other hand, when the temperature at which the stirring is conducted is too high, the functional additive may be thermally decomposed to form new altered components.

[0088] Finally, solid components including the adsorbent that adsorbed the altered components and impurities are separated and removed from the mixture to obtain the reclaimed oil composition C2. Examples of the separation and removal method include a centrifugation and a filtration by a filter. There is no particular restriction in the condition of the centrifugal separation and in the filter aperture, as long as the solid components can be separated and removed. The filter aperture is preferably 4 μm or less, for example. In the case of the centrifugal filtration, any conditions are sufficient as long as the solid components may be settled so that they may be separated from the supernatant (liquid) portion.

[0089] The adsorption treatment described above may be conducted multiple times. In this case, it is preferable that the total amount of the adsorbent used in multiple times is 10 parts by mass or more, and it is more preferable that the total amount is 10 parts by mass or more and 100 parts by mass or less, relative to 100 parts by mass of the industrial oil composition after use. The adsorbent having been used in the adsorption treatment may be utilized in cement production as a heat source and as a bulking material.

[0090] This adsorption treatment allows removal of most of the altered components and impurities, as well as the antioxidant and the functional additives that remain in the same state as before use. Therefore, the reclaimed oil composition C2 thereby obtained is believed to be mostly composed of the base oil that remains in the same state as the industrial oil composition C1 before use.

[0091] In the specific example 1, when the functional additive used in the industrial oil composition C1 before use contains sulfur (specifically, when a sulfur-containing compound is used as the functional additive), it is preferable to further include a step of measuring the amount of the sulfur in the industrial oil composition C1 after use. Here, the amount of the sulfur may be measured specifically by the ICP analysis method. Usually, it is considered that the amount of the sulfur that is measured at the step of measuring the amount of sulfur includes a sulfur compound, altered components thereof, and components derived from the base oil.

[0092] This step of measuring the amount of sulfur is followed by the refining step described above. Specifically, in the adsorption treatment at the refining step, it is preferable to use the adsorbent in an amount of 10 parts by mass or more and 100 parts by mass or less, more preferably 30 parts by mass or more and 90 parts by mass or less, relative to 100 parts by mass of the amount of the sulfur obtained at the step of measuring the amount of sulfur. When the adsorption treatment is conducted multiple times, it is preferable that the total amount of the adsorbent used multiple times is the above-mentioned amount. When the adsorbent is used in the above-mentioned amount, a sulfur compound and altered components thereof, as well as the antioxidant and functional additive that remain in the same state as before use along with the altered components thereof may be properly removed.

[0093] Next, it is preferable to conduct a step of confirming that the sulfur has been removed by measuring the amount of the sulfur in the reclaimed oil composition C2 obtained at the refining step. The extent to which the amount of sulfur has been reduced after the refining step may also be confirmed by measuring the amount of sulfur in the same manner as described above. The amount of the sulfur measured at the step of confirming the amount of sulfur is believed to be derived from the base oil, because usually the sulfur compound and the altered components thereof have already been removed.

[0094] As described above, according to the specific example 1, the above-mentioned reclaimed oil composition C2 may be obtained. The reason for this is considered that the industrial oil composition C1 before use contains, as the antioxidant, at least the neutral phosphite ester derivative and the 2,6-di-t-butylphenol derivative. In other words, the above-mentioned antioxidants allow the base oil to remain at a high percentage even when used for machine lubrication or for metal processing. When the hindered amine compound is included as the antioxidant, it is possible to further suppress the alteration of the base oil even when used for machine lubrication or for metal processing. Due to their high stability, these antioxidants remain at a high percentage when used for machine lubrication or for metal processing. Therefore, when these altered components and impurities, along with the antioxidant and functional additive that remain in the same state as before use, are removed by the adsorption treatment, the reclaimed oil composition C2 is obtained that is largely composed of the base oil that remains in the same state as the industrial oil composition C1 before use (note that the reclaimed oil composition C2 also contains a trace amount of adsorbent that failed to be fully separated). Because the base oil in the reclaimed oil composition C2 is the same as the base oil in the industrial oil composition C1 before use, this may also be used in the production of the industrial oil composition C1 after reclamation as it is. The reclaimed oil composition C2 when used in the production of the industrial oil composition C1 after reclamation may be used with the addition of the base oil as a new oil, or the reclaimed oil compositions C2 may be mixed with each other for use. Therefore, according to the specific example 1, the reclaimed oil composition C2 may be used for the industrial oil composition C1 after reclamation for machine lubrication or for metal processing in the industrial oil use apparatus 2, rather than as the reclaimed industrial oil composition for fuel like in the past; thus, this contributes to the reduction of CO2 and to the carbon neutrality.

[0095] The conventional reclaimed oil composition is, even if it is reclaimed, often used as a fuel oil due to much alteration of the industrial oil composition after use, as described in Patent Literature 1. In addition, when using the conventional reclaimed oil composition, a large amount of new base oil needs to be mixed in order to achieve the desired performance. Thus, there is a problem that the conventional reclamation process to obtain the reclaimed oil composition fails to contribute to the reduction of CO2 relatively.<Reclamation of the Reclaimed Oil Composition: Reclamation Specific Example 2>

[0096] As another example, in this control system Sys1 for circulation and reclamation of the industrial oil, the refining process may have a distillation process under reduced pressure after the adsorption process. Thus, the specific example 2 differs from the specific example 1 in that the adsorption process is followed by the distillation process under reduced pressure to reclaim (produce) the reclaimed oil composition C2. Hereinafter, the items that differ from the specific example 1 will be described. The same items as those in the specific example 1 will be omitted from the description of the specific example 2.

[0097] In the specific example 2, the distillation under reduced pressure is conducted on the industrial oil composition C1 after use that have undergone the adsorption process (the industrial oil composition C1 after the adsorption treatment). It is preferable that the distillation under reduced pressure is conducted at a reduced pressure of 24 mmHg or less, and a heating temperature of 230° C. or higher and 280° C. or lower. For example, when the distillation under reduced pressure is conducted at 24 mmHg, the base oil whose kinematic viscosity (JIS K 2283) at 40° C. is 10 cSt or more and 80 cst or less boils around at 240° C.; thus, this base oil may be distilled. The specific example 2 has the advantage in that it is possible to further remove the altered components and impurities that remains in the industrial oil composition C1 after the adsorption treatment by the distillation under reduced pressure. In the reclaimed oil composition C2 obtained through the adsorption and distillation under reduced pressure as described above, a further larger portion is considered to be composed of the base oil that remains in the same state as the industrial oil composition C1 before use (note that the reclaimed oil composition C2 also contains a trace amount of adsorbent that has not been fully separated).

[0098] In addition, by controlling the heating temperature during the distillation under reduced pressure, it is possible to separately obtain the reclaimed oil compositions C2 that contain a plurality of the base oils having different kinematic viscosity ranges at 40° C. (JIS K 2283).

[0099] In the specific example 2, it may be allowed to conduct, as the refining step, the adsorption treatment, then followed by adding the antioxidant to the industrial oil composition C1 thus treated with the adsorbent, then further followed by the distillation under reduced pressure. The industrial oil composition C1 treated with the adsorbent is composed mostly of the base oil that remains in the same state as the industrial oil composition C1 before use. The addition of the antioxidant allows enhancement of the stability of the base oil. When the industrial oil composition after the adsorption treatment to which the antioxidant is added is subjected to the distillation under reduced pressure, the alteration of the base oil may be properly suppressed even when heated during the distillation under reduced pressure. Especially, during the time of distillation under reduced pressure, it is possible to suppress the alteration of the base oil that boils even at high temperature (e.g., 240° C. or higher, preferably 260° C. or higher and 280° C. or lower).

[0100] As described above, according to the specific example 2, the reclaimed oil composition C2 as described above may be obtained. As in the case of the specific example 1, the reclaimed oil composition C2 obtained in the specific example 2 may be used in the industrial oil composition C1 after reclamation for machine lubrication or for metal processing in the industrial oil use apparatus 2, rather than for a fuel oil like in the past; thus, this contributes to the reduction of CO2.<Reclamation of the Reclaimed Oil Composition: Reclamation Specific Example 3>

[0101] In other example, in the control system Sys1 for circulation and reclamation of the industrial oil, as the refining step, a hydrodesulfurization may be conducted, or a hydrodesulfurization and a distillation under reduced pressure may be conducted successively. Therefore, the specific example 3 differs from the specific examples 1 and 2 in that in place of the adsorption treatment, a hydrodesulfurization is conducted to reclaim (produce) the reclaimed oil composition C2. Hereinafter, the items that differ from the specific example 1 and the specific example 2 will be described. In the specific example 3, the same items as those in the specific example 1 and the specific example 2 will be omitted from the description.

[0102] The hydrodesulfurization is conducted under a high temperature and a high pressure using a hydrodesulfurization catalyst. This allows removal of the altered components and impurities in the industrial oil composition C1 after use, along with the antioxidant and functional additives that remain in the same state as before use. Therefore, the degree of coloration is decreased in the reclaimed oil composition C2 obtained by the hydrodesulfurization. By the hydrodesulfurization, it is possible to remove especially sulfur compounds that remain in the same state as in the industrial oil composition C1 after use and the altered components thereof. It is considered that most of the reclaimed oil composition C2 that is obtained by the hydrodesulfurization is composed of the base oil that remains in the same state as the industrial oil composition C1 before use.

[0103] In addition, the industrial oil composition C1 after hydrodesulfurization may be subjected to the distillation under reduced pressure. The distillation under reduced pressure has the merit that this allows further removal of the altered components and impurities that remain in the industrial oil composition after the hydrodesulfurization. It is considered that the reclaimed oil composition C2 obtained through the hydrodesulfurization and distillation under reduced pressure as described above is even further mostly composed of the base oil that remains in the same state as the industrial oil composition C1 before use.

[0104] As described above, according to the specific example 3, the reclaimed oil composition C2 as described above may be obtained. As in the cases of the specific example 1 and the specific example 2, the reclaimed oil composition C2 obtained in the specific example 3 may be used in the industrial oil composition C1 after reclamation for machine lubrication or for metal processing in the industrial oil use apparatus 2, rather than for a fuel oil like in the past; thus, this contributes to the reduction of CO2 and to the carbon neutrality.<Reclamation of the Reclaimed Oil Composition: Reclamation Specific Example 4>

[0105] As another example, in this control system Sys1 for circulation and reclamation of the industrial oil, a distillation process under reduced pressure may be conducted as the refining process. Thus, the specific example 4 differs from the specific example 1 in that the reclaimed oil composition C2 is reclaimed (produced) by using the distillation under reduced pressure in place of the adsorption treatment. Hereinafter, the items that differ from the specific example 1 will be described. The same items as those in the specific example 1 will be omitted from the description of the specific example 4.

[0106] It is preferable to conduct the distillation under reduced pressure, as in the case of the specific example 2, at a reduced pressure of 24 mmHg or less, and a heating temperature of 230° C. or higher and 280° C. or lower. For example, when the distillation under reduced pressure is conducted at 24 mmHg, the base oil whose kinematic viscosity (JIS K 2283) at 40° C. is 10 cSt or more and 80 cst or less boils around at 240° C.; thus, this base oil may be distilled. This allows reduction in the altered components and impurities in the industrial oil composition C1 after use, along with the antioxidant and the functional additive that remain in the same state as before use. Therefore, the degree of coloration is reduced in the reclaimed oil composition C2 obtained by the distillation under reduced pressure. It is considered that most of the reclaimed oil composition C2 that is obtained by the distillation under reduced pressure is composed of the base oil that remains in the same state as the industrial oil composition C1 before use.

[0107] Note that, because the industrial oil composition C1 after use contains the antioxidant that remains in the same state as before use, it is possible to suppress the alteration of the base oil even by heating during the distillation under reduced pressure. Especially, during the time of distillation under reduced pressure, it is possible to suppress the alteration of the base oil that boils even at high temperature (e.g., 240° C. or higher, preferably 260° C. or higher and 280° C. or lower). It is also allowed to conduct the distillation under reduced pressure after adding the antioxidant to the industrial oil composition C1 after use. By so doing, it is possible to further suppress the alteration of the base oil even when heated during the distillation under reduced pressure.

[0108] In addition, by controlling the heating temperature during the distillation under reduced pressure in the same way as the specific example 2, it is possible to separately obtain the reclaimed oil composition C2 that contains a plurality of the base oils having different kinematic viscosity ranges at 40° C. (JIS K 2283).

[0109] As described above, according to the specific example 4, the reclaimed oil composition C2 as described above may be obtained. As in the case of the specific example 1, the reclaimed oil composition C2 obtained in the specific example 4 may be used in the industrial oil composition C1 after reclamation for machine lubrication or for metal processing in the industrial oil use apparatus 2, rather than for a fuel oil like in the past; thus, this contributes to the CO2 reduction and to the carbon neutrality.<Supplemental Information on the Reclamation of the Reclaimed Oil Composition>

[0110] When reclaiming (producing) the reclaimed oil composition C2 from the industrial oil composition C1 after use, the method may be chosen from the production methods of the specific example 1 to the specific example 4, considering whether or not the functional additive used in the industrial oil composition C1 before use includes a sulfur compound. Specifically, in the case that the sulfur compound is not included, any of the production methods according to the specific example 1 to the specific example 4 may be used. Also, in the case that the sulfur compound whose decomposition temperature is 260° C. or higher is included, any of the production methods according to the specific example 1 to the specific example 4 may be used. On the other hand, in the case that the sulfur compound whose decomposition temperature is lower than 260° C. is included, it is preferable to use any of the production methods according to the specific example 1 to the specific example 3. In the case that the sulfur compound whose decomposition temperature is lower than 260° C. is included, when the distillation under reduced pressure is conducted first as in the case of the specific example 4, the inside of the equipment used for the distillation under reduced pressure may be blackened due to the sulfur compound.

[0111] In the reclamation (production) methods according to the specific example 1 to the specific example 4, in place of the industrial oil composition C1 after use, a defective product obtained during production of the industrial oil composition C1 or a defective stocked product may be used in the refining process. By so doing, the defective product or the defective stocked product may be re-used.<Production of the Industrial Oil Composition after Reclamation>

[0112] In the control system Sys1 for circulation and reclamation of the industrial oil in this embodiment, the reclaimed oil composition C2 obtained as described above is used as the raw material to produce the industrial oil composition C1 after reclamation for re-use in the industrial oil use apparatus 2.<Production of the Industrial Oil Composition after Reclamation: Specific Example of Production>

[0113] As one example, in this control system Sys1 for circulation and reclamation of the industrial oil, the production process of the industrial oil composition C1 after reclamation includes an addition step at which the above-mentioned antioxidant and the above-mentioned functional additive are added to the reclaimed oil composition C2 after reclamation obtained by the above reclamation method. By so doing, the industrial oil composition C1 after reclamation is produced. Specifically, the antioxidants are the neutral phosphite ester derivative represented by the aforementioned formula (B) and the 2,6-di-t-butylphenol derivative represented by the aforementioned formula (C). It is also preferable to use a hindered amine compound represented by the aforementioned formula (D). It is also preferable to add to the reclaimed oil composition C2 obtained by the methods described above the antioxidants and the functional additive with an aforementioned amount in the industrial oil composition C1 after reclamation. This makes the oil composition suitable for use in machine lubrication or in metal processing.

[0114] In addition, to the industrial oil composition C1 after reclamation having the antioxidants and functional additive added therein, the base oil described above may be added as a new oil, or other reclaimed oil composition C2 may be added. Alternatively, the step of adding the additive may be conducted after adding the base oil as the new oil to the reclaimed oil composition C2, or after mixing the reclaimed oil compositions C2 with each other. By so doing, the viscosity of the industrial oil composition C1 after reclamation may be controlled.

[0115] When the above-mentioned refining step is conducted on the industrial oil composition C1 after reclamation and after use, the reclaimed oil composition C2 may be newly obtained, too. When this is followed by the step of adding the additive described above, the industrial oil composition C1 after reclamation may be newly obtained, too. Thus, it is possible to repeat the cycle of the use and the refining, so that this contributes further to the reduction of CO2 and to the carbon neutrality.<Service Life of the Industrial Oil Composition>

[0116] The service life (in other words, life span) of the industrial oil composition C1 as described above, which may be used in the industrial oil use apparatus 2, varies depending on the functional additive that is added in accordance with the intended use, among other conditions. More specifically, the industrial oil composition C1 has a different service life usable in the industrial oil use apparatus 2 depending on the strength of the functional additive that is added and the addition amount thereof.

[0117] Here, the strength of the functional additive is an indicator corresponding to the pressure resistance and the like of the functional additive itself, typically representing the difficulty for the functional additive itself to be consumed. The strength of the functional additive varies, for example, depending on the type of functional additives, even if they provide the same functionality. The functional additive with a relatively higher (stronger) strength tends to be relatively more pressure-resistant and relatively less consumable, while the functional additive with a relatively lower (weaker) strength tends to be relatively less pressure-resistant and relatively more consumable. And the industrial oil composition C1 tends to have a relatively longer service life when the strength of the functional additive added is relatively higher, and a relatively shorter service life when the strength of the functional additive added is relatively lower.

[0118] On the other hand, the amount of the functional additive added is the amount of said functional additive added to the composition containing the base oil when producing the industrial oil composition C1. The industrial oil composition C1 tends to have a relatively longer service life when the amount of the functional additive added is relatively larger, and a relatively shorter service life when the amount of the functional additive added is relatively smaller.

[0119] In other words, the industrial oil composition C1 may have a variable service life usable in the industrial oil use apparatus 2 by controlling the functional additive to be added. In other words, the serviceable life of the industrial oil composition C1 usable in the industrial oil use apparatus 2 may be controlled by controlling the strength or the amount of the functional additive to be added.<State of the Industrial Oil Composition after Use>

[0120] Conversely, it can be said that the amount of the functional additive remaining in the industrial oil composition C1 after use in the pre-use state without being consumed or decomposed in the industrial oil composition C1 after use after passage of a predetermined use period assumed in advance in the industrial oil use apparatus 2 varies depending on the strength and amount of functional additive added to the industrial oil composition C1.

[0121] FIGS. 3, 4, 5, 6, and 7 are schematic diagrams illustrating examples of the industrial oil composition C1 after use after passage of a predetermined use period in the industrial oil use apparatus 2.

[0122] In the industrial oil composition C1 after use that is illustrated in FIG. 3, the added functional additive is almost completely decomposed and consumed, resulting in the state that the content rate thereof is almost zero with containing relatively large amount of impurity components including the wear debris originated from the industrial oil use apparatus 2. Impurity components including wear debris in the industrial oil composition C1 after use tend to increase relatively more as the use period in the industrial oil use apparatus 2 is relatively longer. The industrial oil composition C1 after use typically reaches the state illustrated in FIG. 3 when the actual use period in the industrial oil use apparatus 2 is excessively longer relative to the service life determined by the strength and amount of the functional additive added. In other words, this means that the industrial oil composition C1 after use illustrated in FIG. 3 has had too little functional additive added relative to the expected use period, or has had a relatively too low strength and thereby a relatively too short service life, and thus, this is typically in a state of excessive use in the industrial oil use apparatus 2, that is, in the state in which the base oil may be damaged if the use thereof is continued further. In this respect, the industrial oil composition C1 after use illustrated in FIG. 3 can be input to be in the state that the addition amount of the functional additive or the strength of the oil needs to be increased to prevent damage to the base oil and to increase the service life relative to the expected use period.

[0123] In the industrial oil composition C1 after use illustrated in FIG. 4, the functional additive added is almost completely decomposed and consumed, and the content rate thereof is almost zero; when comparing to the state illustrated in FIG. 3, this is the state that the impurity components including wear debris derived from the industrial oil use apparatus 2 is relatively smaller. The industrial oil composition C1 after use is typically in the state illustrated in FIG. 4 when the actual use period in the industrial oil use apparatus 2 is approximately equal to the service life determined by the strength and amount of the functional additive added, or when the actual use period is slightly longer than the said service life. The industrial oil composition C1 after use illustrated in FIG. 4 is typically in a nearly proper state for a long service life, but it is a state with some room for improvement because the functional additive content is nearly zero, which may damage the base oil if the use thereof is continued further. In this respect, the industrial oil composition C1 after use illustrated in FIG. 4 can also be said that it is in the state that there is room to slightly increase the amount of the functional additive added or slightly increase the strength so as to slightly increase the service life relative to the expected use period in order to further ensure the reliability for prevention of the base oil damage.

[0124] The industrial oil composition C1 after use illustrated in FIG. 5 is in the state that some of the functional additive added remains unconsumed, and it contains the same amount of impurity components including wear debris originated from the industrial oil use apparatus 2 as in FIG. 4. The industrial oil composition C1 after use is typically in the state illustrated in FIG. 5 when the actual use period in the industrial oil use apparatus 2 is slightly shorter than the service life determined by the strength and amount of the functional additive added. The industrial oil composition C1 after use illustrated in FIG. 5 is typically in the balanced standard state with no risk of the base oil damage, although some of the functional additive remains unconsumed.

[0125] The industrial oil composition C1 after use illustrated in FIG. 6 is in the state that it contains relatively more functional additive that remains unconsumed compared to the state in FIG. 5, and the same amount of impurity components including wear debris originated from the industrial oil use apparatus 2 as in FIG. 5. The industrial oil composition C1 after use is typically in the state illustrated in FIG. 6 when the actual use period in the industrial oil use apparatus 2 is relatively shorter compared to the service life determined by the strength and amount of functional additive added. The industrial oil composition C1 after use illustrated in FIG. 6 is typically in the state that there is no risk of damage to the base oil, but there is more functional additive remaining unconsumed than in the standard state in FIG. 5, and thus, it is in the state in which there is some room for improvement relative to the standard state. In this respect, the industrial oil composition C1 after use illustrated in FIG. 6 can also be said that it is in the state that there is a room to slightly reduce the amount of the functional additive added or slightly lower the strength of the functional additive so as to slightly shorten the service life relative to the expected use period in order to reduce more the functional additive that is wasted without being consumed.

[0126] The industrial oil composition C1 after use illustrated in FIG. 7 is in the state that most of the functional additive added remains unconsumed, and it also contains relatively large amounts of impurity components including wear debris originated from the industrial oil use apparatus 2. The industrial oil composition C1 after use typically has an excessively long service life determined by the strength and amount of the functional additive added relative to the actual use period in the industrial oil use apparatus 2; in other words, the functional additive remains almost unconsumed even after a relatively long use period in the industrial oil use apparatus 2, which is the situation illustrated in FIG. 7. This means that the industrial oil composition C1 after use illustrated in FIG. 7 is added with too much functional additive relative to the expected use period, or the strength thereof is relatively too high so that the service life is relatively too long, typically in the state that the majority of the functional additive is mostly unconsumed; so it can be said that the functional additive added to the industrial oil composition C1 is wasted. In this regard, the industrial oil composition C1 after use illustrated in FIG. 7 can also be said that it is in the state that in order to eliminate the functional additive that is wasted without being consumed, the service life relative to the pre-determined use period needs to be shortened by reducing the amount of the functional additive added or by lowering the strength thereof.

[0127] As described above, in the control system Sys1 for circulation and reclamation of the industrial oil, the industrial oil composition C1 that is circulated and reclaimed in this system is controlled by utilizing the fact that the service life of the industrial oil composition C1 and the state of the industrial oil composition C1 after use can be varied by controlling the functional additive added to the industrial oil composition C1.

[0128] In the above description, an overview of the industrial oil composition C1 to be controlled in the control system Sys1 for circulation and reclamation of the industrial oil has been described.<Components of the Control System for Circulation and Reclamation of the Industrial Oil>

[0129] Next, each component in the control system Sys1 for circulation and reclamation of the industrial oil will be described.<Basic Composition of the Production Apparatus>

[0130] The production apparatus 1 is the equipment that produces the industrial oil composition C1 to be controlled in the control system Sys1 for circulation and reclamation of the industrial oil. The production apparatus 1 is installed, for example, in the production plant P1 for production of the industrial oil composition C1. The production apparatus 1 in this embodiment can produce both a new industrial oil composition C1 that is used in the industrial oil use apparatus 2, and an industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 by using the reclaimed oil composition C2 as a raw material.

[0131] The production apparatus 1 may be realized by various known equipment. The production apparatus 1 is composed of, for example, a storage component for taking in and storing the base oil, the antioxidant, the functional additive, and the reclaimed oil composition C2 after reclamation, which are the raw materials for the industrial oil composition C1, and adding equipment for adding and supplying various raw materials stored in the storage component, and mixing equipment for mixing various raw materials added and supplied from the adding equipment.

[0132] The production apparatus 1 in this embodiment produces the industrial oil composition C1 typically on the basis of the composition of the industrial oil composition C1 determined by the composition determination apparatus 5.

[0133] The production apparatus 1 may be configured, for example, to input data concerning the composition of the industrial oil composition C1 determined by the composition determination apparatus 5 (e.g., data concerning the control recipe R to be described later) so as to automatically control each component based on said data to produce the industrial oil composition C1. In this case, the production apparatus 1 is equipped with a data input / output component for inputting and outputting the data, and automatically controls each component based on the data that are input to said data input / output component to produce the industrial oil composition C1. The data input / output component may be realized, for example, by a communication interface that sends and receives various data to and from the composition determination apparatus 5 through communication via a network, whether wired or wireless, or by a recording medium interface that reads and writes various data to and from the recording medium. For example, CD-ROM, DVD, USB memory, SD card memory, Flash memory, hard disk drive (HDD), solid state drive (SSD), flexible disk (FD), magneto-optical disk may be used.

[0134] The production apparatus 1 may be configured, for example, to refer to reference information on the composition of the industrial oil composition C1 determined by the composition determination apparatus 5 (e.g., the control recipe R to be described later) and to control each component by manual operation of an operator based on said reference information to produce the industrial oil composition C1. In this case, the production apparatus 1 is equipped with an operation input component to input operations from the operator, and each component is manually controlled to produce the industrial oil composition C1 based on the operation input to said operation input component. The operation input component may be realized, by for example, a keyboard, a mouse, a trackball, a switch, a button, a touchpad, a touchscreen, a non-contact input circuit, a joystick, and a voice input circuit.

[0135] When producing a new industrial oil composition C1, the production apparatus 1 adds the antioxidant, the functional additive, etc. to the base oil described above as the new oil with the additive strength and amount in accordance with the composition determined by the composition determination apparatus 5, or with the additive strength and amount that have been arbitrarily determined in advance; by so doing, the new industrial oil composition C1 for use in the industrial oil use apparatus 2 is produced. At this time, the composition of the new industrial oil composition C1 may be arbitrarily determined in accordance with the intended use, for example, within the range described in the section <Industrial oil composition to be controlled>, and may be arbitrarily determined in accordance with the composition of a standard product that is selected in advance.

[0136] On the other hand, when the production apparatus 1 produces the industrial oil composition C1 after reclamation by using the reclaimed oil composition C2 as the raw material, it is added the antioxidant, the functional additive, etc. to the reclaimed oil composition C2 in accordance with the composition, the additive strength, and the amount determined at the composition determination apparatus 5, thereby producing the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. At this time, the composition of the industrial oil composition C1 after reclamation is determined, for example, within the range described in the section <Industrial oil composition to be controlled>, and in a proportion suitable for the purpose of properly controlling the industrial oil composition C1 that is circulated and reclaimed in the system.<Basic Composition of the Industrial Oil Use Apparatus>

[0137] The industrial oil use apparatus 2 is the equipment that uses the industrial oil composition C1 that is circulated and reclaimed in the control system Sys1 for circulation and reclamation of the industrial oil. The industrial oil use apparatus 2 is installed, for example, in the use plant P2 where among others, various products are produced, various machine processings are performed, and various equipment are operated, by using the industrial oil composition C1. The industrial oil use apparatus 2 in this embodiment can use both the industrial oil composition C1 newly produced at the production apparatus 1 and the industrial oil composition C1 after reclamation that is produced at the production apparatus 1 using the reclaimed oil composition C2 as the raw material.

[0138] The industrial oil use apparatus 2 may be realized by various known equipment. The industrial oil use apparatus 2 is composed of, for example, a storage component that takes in and stores the industrial oil composition C1 and an operation component that operates with using the industrial oil composition C1 stored in the storage component. The operation component may be realized, for example, by a sliding or machine lubricating component using the industrial oil composition C1 as a turbine oil, a hydraulic oil, a bearing oil, a gear oil, a compressor oil, a traction oil, or by a metal processing component using the industrial oil composition C1 as a cutting oil, a rolling oil, a pressing and drawing oil, a cleaning oil, a plasticizing oil, a punching oil, a heat treatment oil, and a heating medium, among other things.<Basic Composition of the Analysis Apparatus>

[0139] The analysis apparatus 3 is the equipment that analyzes the state of the industrial oil composition C1 after use that is recovered from the industrial oil use apparatus 2. The analysis apparatus 3 is installed, for example, in the analysis component of the reclamation plant P3, which analyzes and reclaims the industrial oil composition C1 after use in the industrial oil use apparatus 2. The analysis apparatus 3 in this embodiment can analyze the state of the industrial oil composition C1 by analyzing a portion of the industrial oil composition C1 after use collected from the industrial oil use apparatus 2 as the sample for analysis. The sample of the industrial oil composition C1 after use that is analyzed by the analysis apparatus 3 may be collected, for example, by taking a portion of the industrial oil composition C1 after use into a sample container / collection kit C1a or the like for analysis at the use plant P2, or by separating a portion of the industrial oil composition C1 after use collected at the reclamation plant P3 into an analytical sample container / collection kit C1a for analysis.

[0140] The analysis apparatus 3 may be realized by various known equipment. The analysis apparatus 3 is composed of, for example, an incorporating component that takes in a sample for analysis of the industrial oil composition C1 after use, an analyzing component that analyzes the sample taken in at the incorporating component, a memory component that stores the analysis results obtained at the analyzing component, and an analysis result output component that outputs the analysis results obtained at the analyzing component. The analyzing component performs, for example, the processing of various analyses, such as a liquid chromatography, an infrared spectroscopic analysis (FTIR), and an inductively coupled plasma (ICP) analysis, which will be described later. The analysis result output component may be realized by, for example, a data input / output component that outputs analysis results as the data, a monitor that outputs analysis results as the images, and a printer that prints out the analysis results. The data input / output component may be configured typically in an almost same manner as the data input / output component in the production apparatus 1 described before.

[0141] The analysis apparatus 3 analyzes, as the state of the industrial oil composition C1 after use, typically the state of consumption of the functional additive in the industrial oil composition C1 after use and the state of admixture of impurity components in the industrial oil composition C1 after use. The analysis apparatus 3 can analyze the consumption state of the functional additive and the admixture state of the impurity components using various known methods, typically such as a spectroscopic analysis and a liquid chromatography.

[0142] For example, the analysis apparatus 3 can analyze the consumption state of the functional additive in the industrial oil composition C1 after use by a liquid chromatography.

[0143] FIG. 8, FIG. 9, and FIG. 10 are the line diagrams illustrating the liquid chromatography as one example of the analysis of the industrial oil composition C1 after use by the analysis apparatus 3. FIG. 8 is one example of the measurement results of the industrial oil composition C1 in the initial state of the use thereof, FIG. 9 is one example of the measurement results in the state of consuming the functional additive, and FIG. 10 is one example of the measurement results in the state that the functional additive has been completely consumed.

[0144] As can be seen in FIG. 8, FIG. 9, and FIG. 10, in the measurement results by the liquid chromatography, the peak strengths originating from the functional additive indicated by the encircled line A gradually decrease from the initial state of use in FIG. 8 to the state that the functional additive is being consumed in FIG. 9 along with the use of the industrial oil composition C1, and further to the state that the functional additive has been completely consumed, resulting in almost complete disappearance of the peaks as can be seen in FIG. 10. By using the liquid chromatography in the analysis apparatus 3 and utilizing this trend, it is possible to analyze the state of the functional additive consumption in the industrial oil composition C1 after use.

[0145] At the analysis apparatus 3, it is also possible to analyze the state of admixture of impurity components in the industrial oil composition C1 after use by an infrared spectroscopic analysis (FTIR), for example.

[0146] FIG. 11 and FIG. 12 are line diagrams of the infrared spectroscopic analysis (FTIR) as one example of the analysis of the industrial oil composition C1 after use in the analysis apparatus 3. FIG. 11 and FIG. 12 each are examples of the measurement results of the industrial oil composition C1 in its initial state of use and in the state that impurity components are mixed, respectively.

[0147] As is clear from FIG. 11 and FIG. 12, in the measurement results by infrared spectroscopic analysis (FTIR), as the industrial oil composition C1 changes from the initial state of use in FIG. 11 to the state in FIG. 12 with the progress of the use thereof, as can be seen in the enclosed line B, the peaks originated from the impurities other than those included in the industrial oil composition C1 at the beginning of use, such as altered components of the functional additive, the base oil, and the antioxidant by decomposition, compounding, and the like during use of the industrial oil composition C1 begin to appear. By utilizing this trend, at the analysis apparatus 3 it is possible to analyze the state of admixture of the impurity components in the industrial oil composition C1 after use by an infrared spectroscopic analysis (FTIR). At the analysis apparatus 3, it is also possible to analyze the state of admixture of solid impurity components such as metals and wear debris that are generated and mixed in during use of the industrial oil composition C1 by ICP (high-frequency inductively coupled plasma) analysis, for example.

[0148] At the analysis apparatus 3 the results of the analysis of the state of the industrial oil composition C1 after use as described above are output via the analysis results output component. At the analysis apparatus 3, said analysis results may be output as the analysis result data by, for example, a data input / output component, or as the analysis result image by a monitor, or as the printed material describing the analysis results by a printer.<Basic Composition of the Reclamation Apparatus>

[0149] The reclamation apparatus 4 reclaims the reclaimed oil composition C2 containing the base oil from the industrial oil composition C1 after use recovered in the industrial oil use apparatus 2. The reclamation apparatus 4 is installed, for example, in the reclamation component in the reclamation plant P3. At the reclamation apparatus 4, the reclaimed oil composition C2, which is the raw material for the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2, can be reclaimed (produced) from the industrial oil composition C1 after use by any of the reclamation methods described in the section <Reclamation of the reclaimed oil composition>.

[0150] The reclamation apparatus 4 may be realized by various known equipment. The reclamation apparatus 4 is composed of, for example, a storage component that takes in and stores the recovered industrial oil composition C1 after use, a reclamation processing component that reclaims the reclaimed oil composition C2 containing the base oil from said industrial oil composition C1 after use by refining the industrial oil composition C1 after use that is stored in the storage component. The reclamation processing component typically performs adsorption, hydrogenation desulfurization, vacuum distillation, and the like as the refining process, and is realized by, for example, addition equipment that adds and supplies the adsorbent and so forth, an agitator, centrifugal equipment, filtering equipment, vacuum distillation equipment, and hydrogenation desulfurization equipment. The reclamation processing component may further be configured so as to perform the aforementioned sulfur measurement.

[0151] At the reclamation apparatus 4 in this embodiment, what is produced is the reclaimed oil composition C2 from the industrial oil composition C1 after use based on typically the analysis results of the state of the industrial oil composition C1 after use that was analyzed at the analysis apparatus 3.

[0152] The reclamation apparatus 4 may be configured, for example, so as to input the data concerning the analysis results of the industrial oil composition C1 after use that is analyzed by the analysis apparatus 3 and automatically control each component based on said data to produce the reclaimed oil composition C2 from the industrial oil composition C1 after use. In this case, the reclamation apparatus 4 is equipped with a data input / output component for inputting and outputting data, and thereby this automatically controls each component based on the data input to said data input / output component to produce the reclaimed oil composition C2. The data input / output component may be configured typically in an almost same manner as the data input / output component in the production apparatus 1 described before.

[0153] The reclamation apparatus 4 may be configured, for example, so as to refer to the reference information about the analysis results of the industrial oil composition C1 after use that is analyzed by the analysis apparatus 3 (e.g., image information about the analysis results, printed materials, etc.) and control each component by manual operation of a worker based on said reference information to produce the reclaimed oil composition C2 from the industrial oil composition C1 after use. In this case, the reclamation apparatus 4 is provided with an operation input component for inputting the operation from an operator, and produces the reclaimed oil composition C2 by manually controlling each component based on the operation that is input to said operation input component. The operation input component may be configured typically in an almost same manner as the operation input component in the production apparatus 1 described before.<Basic Composition of the Composition Determination Apparatus>

[0154] At the composition determination apparatus 5, what is determined is the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. The composition determination apparatus 5 is installed, for example, in the analysis component in the reclamation plant P3 together with the analysis apparatus 3 and other equipment. At the composition determination apparatus 5, what can be determined is the composition of the industrial oil composition C1 after reclamation based on various information.

[0155] The composition determination apparatus 5 may be realized by various known equipment. The composition determination apparatus 5 may be realized typically by various computer devices such as a laptop PC, a desktop PC, a tablet PC, and a smart phone, among others. The composition determination apparatus 5 is composed of, for example, a memory component that stores the composition determination results and a composition result output component that outputs the composition determination results. The composition result output component may be configured typically in an almost same manner as the analysis result output component in the analysis apparatus 3 described before.

[0156] When determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 of this embodiment controls the industrial oil composition C1 that is circulated and reclaimed by controlling the functional additive to be added to the reclaimed oil composition C2.

[0157] In other words, when determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 controls the functional additive to be added to the reclaimed oil composition C2 for the purpose of controlling the industrial oil composition C1 that is circulated and reclaimed in this system. By so doing, the control system Sys1 for circulation and reclamation of the industrial oil controls, for example, the service life of the industrial oil composition C1 and the quality of the industrial oil composition C1 after use, as described above.

[0158] The composition determination apparatus 5 may be configured, for example, so as to input various data (e.g., data such as the analysis results of the industrial oil composition C1 after use analyzed by the analysis apparatus 3) and determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 through the arithmetic processing based on said data. In this case, the composition determination apparatus 5 is provided with a data input / output component for inputting and outputting the data, and thereby determines the composition of the industrial oil composition C1 after reclamation by automatic calculation based on the data that are input to said data input / output component. The data input / output component may be configured typically in an almost same manner as the data input / output component in the production apparatus 1 described before.

[0159] The composition determination apparatus 5 may be configured, for example, so as to refer to various reference information (e.g., image information or printed material describing the analysis results of the industrial oil composition C1 after use analyzed by the analysis apparatus 3), and thereby determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 by manual operation of a worker based on said reference information. In this case, the composition determination apparatus 5 is provided with an operation input component for inputting operation from the operator, and determines the composition of the industrial oil composition C1 after reclamation based on the operation input to said operation input component. The operation input component may be configured typically in an almost same manner as the operation input component in the production apparatus 1 described before.

[0160] The composition determination apparatus 5 of this embodiment determines the composition of the industrial oil composition C1 after reclamation by controlling the amount and strength of the functional additive to be added to the industrial oil composition C1 within the range described in the section <Industrial oil composition to be controlled> and in accordance with the purpose of control of the industrial oil composition C1 that is circulated and reclaimed in the system. The details of composition determination for proper control of the industrial oil composition C1 that is circulated and reclaimed in the system will be explained later more specifically with reference to FIG. 14 through FIG. 19, among others.

[0161] The composition determination apparatus 5 then outputs the result of the determination of the composition of the industrial oil composition C1 after reclamation via the composition result output component. The composition determination apparatus 5 may output, for example, the decision result as the decision result data by a data input / output component, as the decision result image by a monitor, or as the printed material describing the decision result by a printer. In the following description, the material describing the result of the determination of the composition of the industrial oil composition C1 after reclamation by the composition determination apparatus 5 is sometimes referred to as “control recipe R”. In other words, the composition determination apparatus 5 may output the result of the determination of the composition of the industrial oil composition C1 after reclamation as the data related to the control recipe R, as the image describing the control recipe R, or as the printed material describing the control recipe R. Then, as described above, the production apparatus 1 produces the industrial oil composition C1 based on the control recipe R (result of the determination of the composition of the industrial oil composition C1) determined and output by this composition determination apparatus 5.<Basic Composition of the Transport Carrier>

[0162] The transport carrier 6 is a moving unit that transports the industrial oil composition C1 or the reclaimed oil composition C2 among the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4. The transport carrier 6 may be controlled, for example, by the entity that controls the production plant P1 or the reclamation plant P3, or it may be controlled by the entity that is different from said entity, i.e., those specialized in transport and transportation, or by the entity specialized in the collection of the industrial oil composition C1 after use, or other entities. The transport carrier 6 in this embodiment can transport the industrial oil composition C1 or the reclaimed oil composition C2 among various locations where the production apparatus 1, the industrial oil use apparatus 2, the reclamation apparatus 4, etc. are installed, in this case, among the production plant P1, the use plant P2, and the reclamation plant P3.

[0163] The transport carrier 6 may be realized by a variety of known moving vehicles. The transport carrier 6 may be realized by typically: freight vehicles that travel on a road surface, such as a truck, a tank trailer, and a tank lorry; freight trains that travel on railroad tracks, such as a container freight train and a tank wagon train; freight vessels that sail on the ocean, such as a tanker; and cargo flying vehicles that fly in the air, such as an aircraft and a drone, among other vehicles.<Basic Composition of the Storage Facility>

[0164] The storage facility 7 is a facility for storing the industrial oil composition C1 or the reclaimed oil composition C2. The storage facility 7 is installed together with, for example, the production apparatus 1, the reclamation apparatus 4, and the like at the production plant P1, the reclamation plant P3, and the like.

[0165] The storage facility 7 may be realized by various known facilities. The storage facility 7 may be realized typically by a storage tank or the like.<Variations of Each Composition of the Control System for Circulation and Reclamation of the Industrial Oil>

[0166] In the above explanation, the production apparatus 1 is installed in the production plant P1, the industrial oil use apparatus 2 is installed in the use plant P2, the analysis apparatus 3 and the composition determination apparatus 5 are installed in the analysis component of the reclamation plant P3, and the reclamation apparatus 4 is installed in the reclamation component in the reclamation plant P3, but this is not limited thereto.

[0167] For example, the production apparatus 1, the industrial oil use apparatus 2, the analysis apparatus 3, the reclamation apparatus 4, and the composition determination apparatus 5 may all be located together at a single site. For example, it has been described that the analysis apparatus 3, the reclamation apparatus 4, and the composition determination apparatus 5 are installed in the reclamation plant P3, but they may be installed in different locations. For example, the analysis apparatus 3 and the reclamation apparatus 4 may be installed in the reclamation plant P3, and the composition determination apparatus 5 may be installed in the production plant P1. For example, the analysis apparatus 3 and the composition determination apparatus 5 may be configured as single equipment and used concurrently by single equipment. For example, the storage facility 7 may be installed together with the industrial oil use apparatus 2 in the use plant P2 or the like, or it may be installed at a dedicated storage site independent of the production plant P1, the reclamation plant P3, and the like. The storage facility 7 may also serve as the storage facility for the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4.

[0168] The production apparatuses 1, the industrial oil use apparatuses 2, the analysis apparatuses 3, and the reclamation apparatuses 4 each may be installed as multiple units, respectively, in the control system Sys1 for circulation and reclamation of the industrial oil. For example, the production apparatus 1 may be installed separately to produce the industrial oil composition C1 to be newly used in the industrial oil use apparatus 2 and to produce the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 using the reclaimed oil composition C2 as the raw material. For example, a plurality of the production apparatuses 1, the industrial oil use apparatuses 2, the analysis apparatuses 3, and the reclamation apparatuses 4 may each be installed and treated as a group for each given site. Similarly, in the control system Sys1 for circulation and reclamation of the industrial oil a plurality of the composition determination apparatuses 5 may be installed.

[0169] For example, when a plurality of the industrial oil use apparatuses 2 are installed, the composition determination apparatus 5 may control separately for each of the multiple industrial oil use apparatuses 2 the composition of the industrial oil composition C1 after reclamation that is going to be re-used in these industrial oil use apparatuses 2.

[0170] In this case, in the industrial oil use apparatus 2, a first industrial oil use apparatus 2 from which the industrial oil composition C1 after use is recovered may be different from a second industrial oil use apparatus 2 that re-uses the industrial oil composition C1 after reclamation that uses as the raw material the reclaimed oil composition C2 that is reclaimed from the industrial oil composition C1 after use. In other words, in this case, the first industrial oil use apparatus 2 corresponds to the industrial oil use apparatus 2 with which the industrial oil composition C1 after use is recovered to obtain the reclaimed oil composition C2. On the other hand, the second industrial oil use apparatus 2 corresponds to the industrial oil use apparatus 2 that re-uses the industrial oil composition C1 after reclamation, which is obtained from the reclaimed oil composition C2 reclaimed from the industrial oil composition C1 after use that is recovered from the said first industrial oil use apparatus 2. In this case, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in a second industrial oil use apparatus 2 by setting the second industrial oil use apparatus 2 that re-uses the industrial oil composition C1 after reclamation as the object, and when determining the composition, the functional additive to be added to the reclaimed oil composition C2 may be controlled so as to control the industrial oil composition C1 that is circulated and reclaimed. In this case, for example, when the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after use based on the analysis results of the industrial oil composition C1 after use by the analysis apparatus 3, the composition of the industrial oil composition C1 after reclamation may be determined based on the analysis results of the industrial oil composition C1 after use that is recovered from that second industrial oil use apparatus 2.

[0171] The above is a brief overview of the overall composition of the control system Sys1 for circulation and reclamation of the industrial oil<the Flow of Each Step of the Control Method for Circulation and Reclamation of the Industrial Oil in the Control System for Circulation and Reclamation of the Industrial Oil, and Each Step of the Production Method for the Reclaimed Industrial Oil Composition>

[0172] Next, with reference to FIG. 13, one example of the flow of each step of the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition that are executed in the control system Sys1 for circulation and reclamation of the industrial oil will be described. The flow of each process described below is only a representative example and is not limited to this.

[0173] The production method for the reclaimed industrial oil composition in this embodiment includes a recovery step (Step S4), an analysis step (Step S5), a reclamation step (Step S7), a composition determination step (Step S9), and a production step (Step S11). In addition to the above, the control method for circulation and reclamation of the industrial oil in this embodiment includes an industrial oil use step (Step S3) and an industrial oil re-use step (Step S13), namely, this includes the industrial oil use step (Step S3), the recovery step (Step S4), the analysis step (Step S5), the reclamation step (Step S7), the composition determination step (Step S9), the production step (Step S11), and the industrial oil re-use step (Step S13).

[0174] The industrial oil use step (Step S3) is the step of using the industrial oil composition C1 in the industrial oil use apparatus 2. The recovery step (Step S4) is the step of recovering the industrial oil composition C1 after use from the industrial oil use apparatus 2. The analysis step (Step S5) is the step of analyzing the state of the industrial oil composition C1 after use that is recovered. The reclamation step (Step S7) is the step of producing the reclaimed oil composition C2 containing the base oil from the industrial oil composition C1 after use that is recovered. The composition determination step (Step S9) is the step of determining the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. The production step (Step S11) is the step of adding the functional additive to the reclaimed oil composition C2 after reclamation based on the composition determined by the composition determination step (Step S9) to produce the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. The industrial oil re-use step (Step S13) is the step of reusing in the industrial oil use apparatus 2 the industrial oil composition C1 after reclamation that is produced at the production step (Step S11).

[0175] The industrial oil use step (Step S3) and the industrial oil re-use step (Step S13) are performed typically in the industrial oil use apparatus 2. The recovery step (Step S4) is performed typically in the industrial oil use apparatus 2 and the transport carrier 6. The analysis step (Step S5) is performed typically in the analysis apparatus 3. The reclamation step (Step S7) is performed typically in the reclamation apparatus 4. The composition determination step (Step S9) is performed typically in the composition determination apparatus 5. The production step (Step S11) is performed typically in the production apparatus 1.

[0176] Specifically, first, the industrial oil composition C1 for initial use in the industrial oil use apparatus 2 is produced in the production apparatus 1 as an initial production step (Step S1).

[0177] In this case, in the production apparatus 1 the industrial oil composition C1 that is going to be used for the first time may be produced by adding the antioxidant, the functional additive, and so forth to the new base oil, or the industrial oil composition C1 to be used for the first time may be produced by adding the antioxidant, the functional additive, and so forth to the reclaimed oil composition C2 after reclamation that has been produced in advance.

[0178] In this case, in the production apparatus 1 the industrial oil composition C1 for the first use is produced by adding the antioxidant, the functional additive, and so forth with the additive strength and amount in accordance with the composition determined by the composition determination apparatus 5, or with the additive strength and amount that have been arbitrarily determined in advance. The composition of the industrial oil composition

[0179] C1 that is going to be used for the first time may be determined arbitrarily in accordance with the intended use within the range described in the aforementioned section <Industrial oil composition to be controlled>, and may be determined, for example, in proportion to the composition of a standard product selected in advance.

[0180] The industrial oil composition C1 produced by the production apparatus 1 may be temporarily stored in the storage facility 7 or the like attached to the production plant P1 before being shipped to the use plant P2 or the like for use.

[0181] Next, as an industrial oil composition delivery step, the industrial oil composition C1 produced in the production apparatus 1 is transported and delivered by the transport carrier 6 to the use plant P2 where the industrial oil use apparatus 2 that uses said industrial oil composition C1 is installed (Step S2).

[0182] Next, as the industrial oil use step, the industrial oil use apparatus 2 uses the delivered industrial oil composition C1 in said industrial oil use apparatus 2 (Step S3). For example, the industrial oil use apparatus 2 uses the industrial oil composition C1 to produce various products, perform various types of machining, operate various types of equipment, among others.

[0183] Next, after a predetermined use period assumed in advance has passed from the start of use of the industrial oil composition C1 in the industrial oil use apparatus 2, the transport carrier 6 collects as the recovery step the industrial oil composition C1 after use from the industrial oil use apparatus 2 and transports it to the reclamation plant P3 where the analysis apparatus 3, the reclamation apparatus 4, and so forth are installed (Step S4).

[0184] In this case, the industrial oil composition C1 after use may be transported to the reclamation plant P3 under the state that it has the sample for analysis separated by the analytical sample container / collection kit C1a or the like from the composition to be reclaimed in the use plant P2. With regard to the industrial oil composition C1 after use that is transported to the reclamation plant P3, the sample separated by the analytical sample container / collection kit C1a or the like is delivered to the analysis component in the reclamation plant P3, and the remainder to the reclamation component. In the above, it is described that the sample of the industrial oil composition C1 after use that is separated by the analytical sample container / collection kit C1a or the like is collected after a predetermined use period, which is assumed from the start of use of the industrial oil composition C1 in the industrial oil use apparatus 2, and then transported to the reclamation plant P3 for analysis by the analysis apparatus 3. However, the description is not limited to this. The sample for analysis of the industrial oil composition C1 after use may be recovered and collected periodically or irregularly as a sample recovery step by means of the analytical sample container / collection kit C1a or the like for analysis (Step S4a), even before the use period has passed, that is, during use in the industrial oil use apparatus 2, and then transported to the reclamation plant P3 for analysis of the deterioration state and the like by the analysis apparatus 3.

[0185] Next, the analysis apparatus 3 analyzes the state of the recovered industrial oil composition C1 after use as the analysis step (Step S5). Here, the analysis apparatus 3 analyzes the consumption state of the functional additive in the industrial oil composition C1 after use and the admixture state of impurity components in the industrial oil composition C1 after use by using the sample that is separated by the analytical sample container / collection kit C1a or the like. The analysis apparatus 3 analyzes the consumption state of the functional additive and the admixture state of the impurity components by using various known methods, such as a spectroscopic analysis and a liquid chromatography, as described above.

[0186] Next, the analysis apparatus 3 outputs the analysis result of the state of the industrial oil composition C1 after use via the analysis result output component as an analysis result output step (Step S6). The analysis apparatus 3 outputs said result to the reclamation apparatus 4 and to the composition determination apparatus 5. At the analysis apparatus 3, said analysis results may be output as the analysis result data by, for example, a data input / output component, or as the analysis result image by a monitor, or as the printed material describing the analysis results by a printer.

[0187] Next, from the recovered industrial oil composition C1 after use, the reclamation apparatus 4 reclaims as the reclamation step (Step S7) the reclaimed oil composition C2 that contains the base oil. In this case, the reclamation apparatus 4 reclaims the reclaimed oil composition C2 from the industrial oil composition C1 after use by using any one of the reclamation methods described in the section <Reclamation of the reclaimed oil composition>. Here, the reclamation apparatus 4 reclaims the reclaimed oil composition C2 from the industrial oil composition C1 after use by the reclamation method selected in accordance with the state of the industrial oil composition C1 after use, typically based on the analysis results (analysis result data, analysis result images, printed material showing the analysis results, etc.) on the state of the industrial oil composition C1 after use that are output from the analysis apparatus 3.

[0188] The reclaimed oil composition C2 produced by the reclamation apparatus 4 may be temporarily stored in the storage facility 7 and the like attached to the reclamation plant P3 before it is transported to the production plant P1 and so forth.

[0189] Next, as a reclaimed oil composition delivery step (Step S8), the transport carrier 6 transports and delivers the reclaimed oil composition C2 produced by the reclamation apparatus 4 to the production plant P1 where the production apparatus 1 is installed.

[0190] The reclaimed oil composition C2 thus delivered to the production plant P1 may be temporarily stored in the storage facility 7 and the like attached to the production plant P1 before it is used as the raw material for the industrial oil composition C1 after reclamation in the production apparatus 1.

[0191] Next, as a composition determination step (Step S9), the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2.

[0192] In this case, when determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 controls the industrial oil composition C1 that is circulated and reclaimed by controlling the functional additive to be added to the reclaimed oil composition C2. In other words, the composition determination apparatus 5 controls the functional additive to be added to the reclaimed oil composition C2 in order to control the industrial oil composition C1 that is circulated and reclaimed in the system; by so doing, for example, the service life of the industrial oil composition C1 or the quality of the industrial oil composition C1 after use may be controlled.

[0193] For example, at the composition determination step (Step S9), based at least on the analysis result by the analysis apparatus 3 at the analysis step (Step S5), the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. In other words, in accordance with, among other things, the state and actual degradation indicator of the industrial oil composition C1 after use, the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation based on the analysis results (analysis result data, analysis result images, printed material describing the analysis results, etc.) on the state of the industrial oil composition C1 after use, the results being output from the analysis apparatus 3. Here, the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation by controlling the amount and strength of the functional additive to be added to the industrial oil composition C1 after reclamation within the range described in the section <Industrial oil composition to be controlled> and for the purpose of controlling the service life of the industrial oil composition C1 and the quality of the industrial oil composition C1 after use.

[0194] Next, the composition determination apparatus 5 outputs the determination result of the composition of the industrial oil composition C1 after reclamation via the composition result output component as a determination result output step (Step S10). The composition determination apparatus 5 outputs the determination result to the production apparatus 1. The composition determination apparatus 5 may, for example, output the result of such determination as the data concerning the control recipe R by the data input / output component, as the image describing the control recipe R by the monitor, or as the printed material describing the control recipe R by the printer.

[0195] The before and after relationship between the reclamation step (Step S7) and the composition determination step (Step S9) is not limited to the above order. Therefore, at the reclamation step (Step S7) and the composition determination step (Step S9), the reclamation step (Step S7) may be performed after the composition determination step (Step S9) is performed first, or the reclamation step (Step S7) and the composition determination step (Step S9) may be performed concurrently.

[0196] Next, as the production step, the production apparatus 1 adds the antioxidant and the functional additive to the reclaimed oil composition C2 after reclamation based on the composition determined by the composition determination apparatus 5 at the composition determination step (Step S9) to produce the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 (Step S11). In this case, the production apparatus 1 performs

[0197] an addition step to add the antioxidant, the functional additive, and the like to the reclaimed oil composition C2 reclaimed by the reclamation apparatus 4 at the reclamation step (Step S7) to produce the industrial oil composition C1 after reclamation. In this case, the production apparatus 1 produces the industrial oil composition C1 after reclamation by adding the antioxidant, the functional additive, and the like to the reclaimed oil composition C2 with the strength and amount of the additives in accordance with the composition that is determined by the composition determination apparatus 5 based on the determination results (data concerning the control recipe R, images describing the control recipe R, and a printed material describing the control recipe R) that are output from the composition determination apparatus 5 with respect to the composition of the industrial oil composition C1 after reclamation.

[0198] In the same manner as described above, the industrial oil composition C1 after reclamation that is produced by the production apparatus 1 may be temporarily stored in the storage facility 7 or the like, which is attached to the production plant P1, before it is transported to the use plant P2 and so forth.

[0199] Next, similarly to the Step S2 described above, as a reclaimed industrial oil composition delivery step (Step S12), the transport carrier 6 transports and delivers the industrial oil composition C1 after reclamation that is produced by the production apparatus 1 to the use plant P2 where the industrial oil use apparatus 2 that uses said industrial oil composition C1 is installed.

[0200] Next, similarly to the Step S13 described above, as an industrial oil re-use step (Step S13), the industrial oil use apparatus 2 uses the delivered industrial oil composition C1 after reclamation in this industrial oil use apparatus 2.

[0201] Thereafter, by repeating the steps from Step S4 to Step S13 described above, the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2 is established in the control system Sys1 for circulation and reclamation of the industrial oil.

[0202] <Determination and control of the composition of the industrial oil composition>

[0203] Next, the details of the composition determination for control of the industrial oil composition C1 that is circulated and reclaimed in the control system Sys1 for circulation and reclamation of the industrial oil will be described with reference to FIG. 14 through FIG. 19.

[0204] As described above, the control system Sys1 for circulation and reclamation of the industrial oil controls the industrial oil composition C1 that is circulated and reclaimed in this system by utilizing the fact that the service life of the industrial oil composition C1 and the state of the industrial oil composition C1 after use can be varied by controlling the functional additive that is added to the industrial oil composition C1. Here, the control of the industrial oil composition C1 that is circulated and reclaimed includes, for example, the control of the service life of the industrial oil composition C1 and the quality of the industrial oil composition C1 after use. Namely, the control system Sys1 for circulation and reclamation of the industrial oil controls the service life of the industrial oil composition C1 and the quality of the industrial oil composition C1 after use by controlling the strength and amount of the functional additive that is added to the reclaimed oil composition C2 for the purpose of controlling the industrial oil composition C1 by the composition determination apparatus 5 at the composition determination step (Step S9). Hereinafter, a specific example of the composition determination and control with regard to the industrial oil composition C1 will be described with reference to FIG. 14 through FIG. 19.

[0205] The composition determination apparatus 5 may control the addition amount and strength of the functional additive without stages within the range described in the section <Industrial oil composition to be controlled> in accordance with the purpose of control, but in the following explanation, as described in FIG. 14, for the sake of convenience and clarity, the strength is controlled in 3 stages, the addition amount in 5 stages, and the combination of strength and addition amount in 15 stages in total. In this section, the industrial oil composition C1 with the strength of “medium” and the functional additive amount of “3” shall be treated as the “standard product”.

[0206] In controlling the functional additives, typically the priority may be put to reduce the addition amount to a relatively low level. This is because a relatively smaller addition amount of the functional additive in the industrial oil composition C1 tends to result in relatively fewer impurities in the industrial oil composition C1 after use, so that relatively fewer objects need to be removed from the industrial oil composition C1 after use when the reclaimed oil composition C2 is produced from said industrial oil composition C1 after use.

[0207] However, some types of the functional additive are more expensive than others, and even if the addition amount thereof itself is small, the higher unit price may lead to a relatively higher total cost (e.g., the relatively higher the strength, the higher the unit price tends to be).

[0208] Therefore, in controlling the functional additive, the control priority may be determined based on the balance between the cost and the effectiveness, such as reducing the addition amount as much as possible with lowering the priority of those with high unit price.

[0209] Each step in the composition determination apparatus 5 described below may be executed by arithmetic processing by the arithmetic component of the composition determination apparatus 5 itself, or by manual processing by a worker's operation via the operation input component.<Composition Determination and Control of the Industrial Oil Composition: Specific Example 1 of Composition Determination and Control>

[0210] Specific example 1, illustrated in FIG. 15 through FIG. 17, describes an example of controlling the quality of the industrial oil composition C1 after use. In other words, in this specific example 1, the control of the industrial oil composition C1 includes the control of the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over. FIG. 15 through FIG. 17, described below, describe examples of specific processing details in the composition determination step (Step S9) described above.

[0211] In this case, at the composition determination step (Step S9), in determining the composition of the industrial oil composition C1 after reclamation the composition determination apparatus 5 controls the quality of the industrial oil composition C1 after use whose use period has been over by controlling the functional additive to be added to the reclaimed oil composition C2. In other words, in this specific example 1, the object to be controlled by the composition control of the industrial oil composition C1 after reclamation by the composition determination apparatus 5 is the quality and condition of the industrial oil composition C1 after use whose pre-assumed use period has been over.

[0212] More specifically, at the composition determination step (Step S9), the composition determination apparatus 5 controls and determines the composition of the industrial oil composition C1 after reclamation by controlling the strength or the addition amount of the functional additive so that the quality of the industrial oil composition C1 after use whose use period has been over will become the prescribed quality. The composition determination apparatus 5 then outputs the control recipe R in accordance with this determined composition. In other words, the composition determination apparatus 5 outputs said control recipe R by changing the composition of the industrial oil composition C1 after reclamation produced by the production apparatus 1 in accordance with the prescribed quality of the industrial oil composition C1 after use. The production apparatus 1 then produces the industrial oil composition C1 after reclamation based on this control recipe R. In this way, the composition determination apparatus 5 optimizes the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be the desired level.

[0213] The use period of the industrial oil composition C1 subject to the quality control is an arbitrarily assumed period in advance, and this may be arbitrarily determined in accordance with, for example, the intended use of the industrial oil composition C1, the type of the industrial oil use apparatus 2 to be used, the operation plan and scheduled operation period of the industrial oil use apparatus 2, and the period during which the proper function of the industrial oil composition C1 is guaranteed, among others. The use period may be set as a fixed period or as a variable period depending on the operating conditions of the industrial oil use apparatus 2; for example, different lengths may be set for the busy season when the industrial oil use apparatus 2 operates at a high load and the off-peak season when it operates at a low load. In either case, the quality control of the industrial oil composition C1 after use by the composition determination apparatus 5 is performed for the pre-assumed use period assumed in advance.

[0214] As one example, the prescribed quality in the quality control of the industrial oil composition C1 after use is the quality corresponding to the standard state as illustrated in FIG. 5. In other words, the composition determination apparatus 5 conducts the quality control in the way the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over will become so that most of the functional additive added to the industrial oil composition C1 have been consumed with some portion being unconsumed, and that the composition contains some impurity components including wear debris, as illustrated in FIG. 5. In other words, the composition determination apparatus 5 controls the quality of the industrial oil composition C1 after use whose use period has been over by controlling the strength and amount of the functional additive to be added to the industrial oil composition C1 with the goal of achieving the quality equivalent to a balanced standard state in which the functional additive in the industrial oil composition C1 is not wasted and there is no risk of the damage to the base oil after the relevant use period has been over.

[0215] Specifically, as illustrated in FIG. 15, the composition determination apparatus 5 first obtains the analysis result on the state of the industrial oil composition C1 after use that is recovered from the industrial oil use apparatus 2 after the pre-assumed use period has been over (Step S100). Typically, at the analysis result output step (Step S6) described above, the composition determination apparatus 5 acquires the analysis result on the state of the industrial oil composition C1 after use that is output from the analysis apparatus 3 via the analysis result output component.

[0216] Next, the composition determination apparatus 5 determines whether or not the functional additive in the industrial oil composition C1 after use is in the state that the functional additive is almost 100% consumed (completely consumed state) based on the analysis result obtained at the Step S100 (Step S101). The composition determination apparatus 5 can determine the consumption state of the functional additive in the industrial oil composition C1 after use, based on, for example, the result of analysis with regard to a liquid chromatography among the results by the analysis apparatus 3 (the same is true for the same type of determination below).

[0217] When the composition determination apparatus 5 determines that the functional additive in the industrial oil composition C1 after use is almost 100% consumed (state of completely consumed) (Step S101: Yes), it determines whether or not the impurity components in the industrial oil composition C1 after use are above a predetermined rate, 5% or more in this case (Step S102). The composition determination apparatus 5 can determine the mixed state of the impurity components in the industrial oil composition C1 after use, based on, for example, the analysis result with regard to the infrared spectroscopic analysis (FTIR) among the analysis results by the analysis apparatus 3 (the same is true for the same type of determination below).

[0218] When the composition determination apparatus 5 determines that the impurity components in the industrial oil composition C1 after use is 5% or more (Step S102: Yes), it determines that the industrial oil composition C1 after use is in an “excessively used state” as illustrated in FIG. 3 (Step S103).

[0219] Next, the composition determination apparatus 5 determines whether or not the strength of the current functional additive added to the industrial oil composition C1 after use in question is “high (strong)” (Step S104). For example, the composition determination apparatus 5 can determine whether or not the current strength of the functional additive is “high (strong) “, based on, for example, the history of the previous control recipe R and the analysis results by the analysis apparatus 3 (the same is true for the same type of determination below). When the composition determination apparatus 5

[0220] determines that the current strength of the functional additive added to the industrial oil composition C1 after use is “high” (Step S104: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is “no change” from the current strength, and the addition amount thereof is determined to be “+2” relative to the current amount, thereby outputting the control recipe R in accordance with this determined result (Step S105); and with this, this process is terminated. Here, “+2” relative to the current addition amount is equivalent to increasing the addition amount by, for example, an approximately 20% by mass relative to the current amount added (the same applies below).

[0221] The production apparatus 1 then produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 based on this control recipe R. As a result, the industrial oil composition C1 after reclamation has a relatively larger amount of the functional additive added than the previous one, which allows for a relatively longer service life relative to the expected use period. In other words, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to “standard state”, as illustrated in FIG. 5 from the quality corresponding to the “excessive use state” as illustrated in FIG. 3; with this, the damage to the base oil may be prevented. Here, the composition determination apparatus 5 can reduce the number of trials until optimization by significantly changing the amount of the functional additives in two stages by setting the addition amount of the functional additive to “+2” relative to the current addition amount.

[0222] When the composition determination apparatus 5 determines at the determination of Step S104 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “high” (Step S104: No), it determines whether the strength of the current functional additive added to the industrial oil composition C1 after use is “low (weak)” or not (Step S106).

[0223] When the composition determination apparatus 5 determines that the strength of the current functional additive added to the industrial oil composition C1 after use is “low” (Step S106: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is set “+2” (i.e., “high”) relative to the current strength, and the addition amount thereof is set “no change” from the current addition amount, and thereby outputting the control recipe R in accordance with the result of this determination (Step S107); and with this, this process is terminated.

[0224] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively higher strength of the functional additive than the previous one, which allows for a relatively longer service life relative to the expected use period. In this case, in the way as described above, the composition determination apparatus 5 also determines the composition of the industrial oil composition C1 after reclamation, so that the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over can be controlled so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5, from the quality corresponding to the “excessive use state”, as illustrated in FIG. 3; with this, the damage to the base oil may be prevented. Here, the composition determination apparatus 5 can reduce the number of trials until optimization by significantly changing the strength of the functional additive in two stages by setting it to “+2” relative to the current strength. Also here, in controlling the functional additive, for example, the strength of the functional additives is controlled with the priority given to maintaining a relatively low addition amount.

[0225] When the composition determination apparatus 5 determines in the determination Step S106 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “low”, that is, the strength of the current functional additive is “medium (standard)” (Step S106: No), in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is determined to be “+1” (i.e., “high”) relative to the current strength, and the addition amount to be “+1” relative to the current addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S108); and with this, this process is terminated. Here, “+1” relative to the current addition amount corresponds to increase the addition amount by, for example, an approximately 10% by mass relative to the current addition amount (the same applies below).

[0226] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2.

[0227] As a result, the industrial oil composition C1 after reclamation has a relatively higher strength of the functional additive and a relatively larger amount of the functional additive than the previous one, which allows for a relatively longer service life relative to the pre-assumed use period. In this case, in the way as described above, the composition determination apparatus 5 also determines the composition of the industrial oil composition C1 after reclamation, so that the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over can be controlled so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5, from the quality corresponding to the “excessive use state”, as illustrated in FIG. 3; with this, the damage to the base oil may be prevented.

[0228] When the composition determination apparatus 5 determines at the determination of Step S102 that the impurity components in the industrial oil composition C1 after use is less than 5% (Step S102: No), it determines that the industrial oil composition C1 after use is in the “suitable state for a long life but with some room for improvement”, as illustrated in FIG. 4 (Step S109).

[0229] Next, the composition determination apparatus 5 determines whether the strength of the current functional additive added to the industrial oil composition C1 after use in question is “high” or not (Step S110).

[0230] When the composition determination apparatus 5 determines that the current strength of the functional additive added to the industrial oil composition C1 after use is “high” (Step S110: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is “no change” from the current strength, and the addition amount thereof is determined to be “+1” relative to the current amount, thereby outputting the control recipe R in accordance with this determined result (Step S111); and with this, this process is terminated.

[0231] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2.

[0232] As a result, the industrial oil composition C1 after reclamation has a relatively larger amount of the functional additive added than the previous one, which allows for a relatively longer service life relative to the expected use period. In other words, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state” as illustrated in FIG. 5 from the quality corresponding to the “suitable state for a long life but with some room for improvement” as illustrated in FIG. 4; with this, the damage to the base oil can be prevented more surely.

[0233] When the composition determination apparatus 5 determines at the determination Step S110 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “high”, that is, the strength of the functional additive is “medium” or “low” (Step S110: No), in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is determined to be “+1” (i.e., “high” or “medium”) relative to the current strength and the addition amount to be “no change” from the current addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S112); and with this, this process is terminated.

[0234] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively higher strength of the functional additive than the previous one, which allows for a relatively longer service life relative to the expected use period. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state” as illustrated in FIG. 5 from the quality corresponding to the “suitable state for a long life but with some room for improvement” as illustrated in FIG. 4; with this, the damage to the base oil can be prevented more surely. Here, in controlling the functional additive, for example, the strength of the functional additives is controlled with the priority given to maintaining a relatively low addition amount.

[0235] When the composition determination apparatus 5 determines at the determination Step S101 that the functional additive in the industrial oil composition C1 after use is not in the state of approximately 100% consumption (completely consumed state) (Step S101: No), it is determined whether or not the functional additive consumption is 85% or more and less than 100%, as illustrated in FIG. 16 (Step S113).

[0236] When the composition determination apparatus 5 determines that the consumption of the functional additive in the industrial oil composition C1 after use is 85% or more and less than 100% (Step S113: Yes), it is determined that the industrial oil composition C1 after use is in the “standard state” as illustrated in FIG. 5 (Step S114).

[0237] Next, the composition determination apparatus 5 determines whether the strength of the current functional additive added to the industrial oil composition C1 after use in question is “high” or not (Step S115).

[0238] When the composition determination apparatus 5 determines that the strength of the current functional additive added to the industrial oil composition C1 after use is “high” (Step S115: Yes), it determines in the history until today whether or not it has ever tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, namely, it determines whether or not it has ever tried the composition having the addition amount increased and the strength set to “medium” (Step S116). This judgment is used for selection of a more optimal functional additive based on the balance between cost and effectiveness while avoiding the use of the additive having a high unit price, such as in the case when the functional additive having a “high” strength is relatively expensive.

[0239] When the composition determination apparatus 5 determines that, in the history up to now, it has tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, that is, it determines that it has tried to increase the addition amount relative to the current composition while setting the strength at “medium” (Step S116: Yes), it determines that the present composition is optimal; then, it determines to make “no change” in both the strength and the addition amount of the functional additive, and thereby outputting the control recipe R in accordance with this determined result (Step S117); and with this, this process is terminated.

[0240] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2.

[0241] As a result, the industrial oil composition C1 after reclamation is produced with the same composition as before. In other words, by determining the composition of the industrial oil composition C1 after reclamation as described above, the composition determination apparatus 5 can control so as to maintain the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5.

[0242] At the determination Step S116, when the composition determination apparatus 5 determines that in the history up to now, it has never tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, that is, it determines that the composition having the addition amount increased while setting the strength at “medium” has never been tried (Step S116: No), then in the composition of the industrial oil composition C1 after reclamation to be produced next time, it determines that the strength of the functional additive is set to “−1” (i.e., “medium”) relative to the current strength and the addition amount to “+1” relative to the current addition amount, and thereby outputting the control recipe R in accordance with this determination result (Step S118); and with this, this process is terminated.

[0243] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, by determining the composition of the industrial oil composition C1 after reclamation in the way as described above, the composition determination apparatus 5 can try the composition that maintains the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5, while avoiding the use of a relatively expensive functional additive thereby relatively lowering the total cost.

[0244] When the composition determination apparatus 5 determines at the determination of Step S115 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “high” (Step S115: No), it determines whether the strength of the current functional additive added to the industrial oil composition C1 after use is “low” or not (Step S119). When the composition determination apparatus 5

[0245] determines that the strength of the current functional additive added to the industrial oil composition C1 after use is “low” (Step S119: Yes), it determines to make “no change” from the current level in both the strength of the functional additive and the addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S120); and then, this process is terminated.

[0246] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation is produced with the same composition as before. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the way as described above, the composition determination apparatus 5 can control so as to maintain the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5.

[0247] When the composition determination apparatus 5 determines in the determination at the Step S119 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “low”, namely when it determines that the strength of the current additive is “medium” (Step S119: No), it determines in the history up to now whether or not it has ever tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, namely, it determines whether or not it has ever tried the composition having the addition amount increased and the strength set to “low” (Step S121). Similar to the above, this determination is also used to select a more optimal functional additive based on the balance between cost and effectiveness while avoiding the use of the additive with a higher unit price, for example, when the functional additive with a “medium” strength is relatively expensive as compared to those with a “low” strength.

[0248] When the composition determination apparatus 5 determines that, in the history up to now, it has tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, that is, when it determines that it has tried to increase the addition amount relative to the current composition while setting the strength at “low” (Step S121: Yes), it determines that the present composition is optimal; then, it determines to make “no change” in both the strength and the addition amount of the functional additive, and thereby outputting the control recipe R in accordance with this determined result (Step S122); and with this, this process is terminated.

[0249] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation is produced with the same composition as before. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the way as described above, the composition determination apparatus 5 can control so as to maintain the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5.

[0250] At the determination Step S121, when the composition determination apparatus 5 determines that in the history up to now, it has never tried the composition having the strength of the functional additive set to “−1” relative to the current strength and the addition amount to “+1” relative to the current addition amount, that is, when it determines that the composition having the addition amount increased while setting the strength at “low” has never been tried (Step S121: No), then in the composition of the industrial oil composition C1 after reclamation to be produced next time, it determines that the strength of the functional additive is set to “−1” (i.e., “low”) relative to the current strength and the addition amount to “+1” relative to the current addition amount, and thereby outputting the control recipe R in accordance with this determination result (Step S123); and with this, this process is terminated.

[0251] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, by determining the composition of the industrial oil composition C1 after reclamation in the way as described above, the composition determination apparatus 5 can try the composition that maintains the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over at the quality equivalent to the “standard state” as illustrated in FIG. 5, while avoiding the use of a relatively expensive functional additive thereby relatively lowering the total cost.

[0252] When the composition determination apparatus 5 determines in the determination of the Step S113 that the consumption of the functional additive in the industrial oil composition C1 after use is not in the state of 85% or more and less than 100%, that is, the consumption of the functional additive is less than 85% (Step S113: No), it determines whether or not the impurity components in the industrial oil composition C1 after use is more than a prescribed percentage, in this case 5% or more, as illustrated in FIG. 17 (Step S124).

[0253] When the composition determination apparatus 5 determines that the impurity components in the industrial oil composition C1 after use is 5% or more (Step S124: Yes), it determines that the industrial oil composition C1 after use is in the “state that the functional additive is wasted” as illustrated in FIG. 7 (Step S125).

[0254] Next, the composition determination apparatus 5 determines whether the strength of the current functional additive added to the industrial oil composition C1 after use in question is “low” or not (Step S126).

[0255] When the composition determination apparatus 5 determines that the current strength of the functional additive added to the industrial oil composition C1 after use is “low” (Step S126: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is “no change” from the current strength, and the addition amount thereof is determined to be “−2” relative to the current addition amount, thereby outputting the control recipe R in accordance with this determined result (Step S127); and with this, this process is terminated. Here, “−2” relative to the current addition amount corresponds to reducing the addition amount by, for example, an approximately 20% by mass relative to the current addition amount (the same applies below).

[0256] The production apparatus 1 then produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 based on this control recipe R. As a result, the industrial oil composition C1 after reclamation has a relatively smaller addition amount of the functional additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In other words, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5 from the quality corresponding to the “state that the functional additive is wasted” as illustrated in FIG. 7; with this, the functional additive that is wasted without being consumed may be reduced. Here, the composition determination apparatus 5 can shorten the number of trials until optimization by significantly changing the amount of the functional additives in two stages by setting the addition amount of the functional additive to “−2” relative to the current addition amount.

[0257] When the composition determination apparatus 5 determines at the determination of Step S126 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “low” (Step S126: No), it determines whether the strength of the current functional additive added to the industrial oil composition C1 after use is “high” or not (Step S128).

[0258] When the composition determination apparatus 5 determines that the strength of the current functional additive added to the industrial oil composition C1 after use is “high” (Step S128: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is set “−2” (i.e., “low”) relative to the current strength, and the addition amount thereof is set “no change” from the current addition amount, and thereby outputting the control recipe R in accordance with the result of this determination (Step S129); and with this, this process is terminated.

[0259] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively lower strength of the functional additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5, from the quality corresponding to the “state that the functional additive is wasted” as illustrated in FIG. 7; with this, the functional additive that is wasted without being consumed may be reduced. Here, the composition determination apparatus 5 can shorten the number of trials until optimization by significantly changing the strength of the functional additive in two stages by setting it to “−2” relative to the current strength. Also here, in controlling the functional additive, for example, the strength of the functional additive is controlled with the priority given to avoiding the use of the additive whose unit price is relatively high.

[0260] When the composition determination apparatus 5 determines in the determination Step S128 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “high”, that is, the strength of the current functional additive is “medium” (Step S128: No), in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is determined to be “−1” (i.e., “low”) relative to the current strength, and the addition amount to be “−1” relative to the current addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S130); and with this, this process is terminated. Here, “−1” relative to the current addition amount corresponds to reducing the addition amount by, for example, an approximately 10% by mass relative to the current addition amount (the same applies below).

[0261] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively lower strength of functional additive and a relatively smaller amount of the additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5, from the quality corresponding to the “state that the functional additive is wasted” as illustrated in FIG. 7; with this, the functional additive that is wasted without being consumed may be reduced.

[0262] When the composition determination apparatus 5 determines at the determination Step S124 that the impurity components in the industrial oil composition C1 after use is less than 5% (Step S124: No), it determines that the industrial oil composition C1 after use is in the “state in which there is some room for improvement relative to the standard state”, as illustrated in FIG. 6 (Step S131).

[0263] Next, the composition determination apparatus 5 determines whether the strength of the current functional additive added to the industrial oil composition C1 after use in question is “low” or not (Step S132).

[0264] When the composition determination apparatus 5 determines that the current strength of the functional additive added to the industrial oil composition C1 after use is “low” (Step S132: Yes), it determines that in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is “no change” from the current strength, and the addition amount thereof is determined to be “−1” relative to the current addition amount, thereby outputting the control recipe R in accordance with this determined result (Step S133); and with this, this process is terminated.

[0265] Then, in the same manner as above, based on this control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively smaller addition amount of the functional additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In other words, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5 from the quality corresponding to the “state in which there is some room for improvement relative to the standard state”, as illustrated in FIG. 6; with this, the functional additive that is wasted without being consumed may be further reduced.

[0266] When the composition determination apparatus 5 determines at the determination Step S132 that the strength of the current functional additive added to the industrial oil composition C1 after use is not “low”, that is, the strength of the functional additive is “high” or “medium” (Step S132: No), in the composition of the industrial oil composition C1 after reclamation to be produced next time, the strength of the functional additive is determined to be “−1” (i.e., “medium” or “low”) relative to the current strength and the addition amount to be “no change” from the current addition amount, and thereby outputting the control recipe R in accordance with this determined result (Step S134); and with this, this process is terminated. Then, in the same manner as above, based on this

[0267] control recipe R the production apparatus 1 produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2. As a result, the industrial oil composition C1 after reclamation has a relatively lower strength of the functional additive than the previous one, which allows for a relatively shorter service life relative to the expected use period. In this case, too, by determining the composition of the industrial oil composition C1 after reclamation in the manner as described above, the composition determination apparatus 5 can control the quality of the industrial oil composition C1 after use whose pre-assumed use period has been over so as to be closer to the quality corresponding to the “standard state”, as illustrated in FIG. 5 from the quality corresponding to the “state in which there is some room for improvement relative to the standard state”, as illustrated in FIG. 6; with this, the functional additive that is wasted without being consumed may be further reduced.

[0268] Here, in controlling the functional additive, for example, the strength of the functional additive is controlled with the priority given to avoiding the use of the additive whose unit price is relatively high.

[0269] The control system Sys1 for circulation and reclamation of the industrial oil controls the quality of the industrial oil composition C1 that is circulated and reclaimed in the system as described above so that the base oil in the reclaimed oil composition C2 that is circulated and reclaimed in the system may be prevented from being damaged thereby allowing proper protection, and on top of it, the functional additive in the industrial oil composition C1 may be prevented from being wasted without being used. In other words, with the control system Sys1 for circulation and reclamation of the industrial oil, it is possible to compatibly achieve in good balance both the protection of the reclaimed oil composition C2 containing the base oil and the suppression of the waste of the functional additive.

[0270] As a result, the control system Sys1 for circulation and reclamation of the industrial oil can contribute to the real world not only in terms of CO2 reduction and carbon neutrality, but also in terms of so-called SDGs, an environmental load reduction, and a circular economy.

[0271] For example, when the control system Sys1 for circulation and reclamation of the industrial oil performs a fixed-rate lubrication control service and the like on a monthly or yearly basis by so-called subscription or the like, using said system that can stably circulate and reclaim the reclaimed oil composition C2 containing the base oil, it is possible to improve the satisfaction level of customers enjoying this service. In other words, by controlling the quality of the industrial oil composition C1 after use in the way as described above, the control system Sys1 for circulation and reclamation of the industrial oil can suppress, for example, an excessive use of the industrial oil composition C1 in the industrial oil use apparatus 2 and, conversely, a wasteful replacement of the industrial oil composition C1 in the industrial oil composition C1. With this, the control system Sys1 for circulation and reclamation of the industrial oil can compatibly satisfy, for example, both the sure protection of the industrial oil use apparatus 2 and the suppression of the decrease in the operation rate of the industrial oil use apparatus 2, thereby allowing to improve the satisfaction of the customers who enjoy this service. The control system Sys1 for circulation and reclamation of the industrial oil can also prevent, for example, the situation in which the functional additive provided as the chargeable consumer good in the service is hardly consumed in spite of the fact that the customer has paid a fixed fee for this service, thereby suppressing the decline in customer satisfaction. In other words, the control system Sys1 for circulation and reclamation of the industrial oil can not only properly protect the base oil contained in the reclaimed oil composition C2 at the time when the pre-assumed use period has passed, but can also achieve both the waste control of the functional additive and the improved customer satisfaction by ensuring that the functional additive is consumed in a proper amount.<Composition Determination and Control of the Industrial Oil Composition: Specific Example 2 of Composition Determination and Control>

[0272] The specific example 2, illustrated in FIG. 18 through FIG. 19, describes a control example of the circulation and reclamation cycle of the reclaimed oil composition C2. In other words, in this specific example 2, the control of the industrial oil composition C1 includes the control of circulation and reclamation cycle of the reclaimed oil composition C2.

[0273] In this case, at the composition determination step (Step S9), in determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 controls the circulation and reclamation cycle of the reclaimed oil composition C2 by controlling the functional additive to be added to the reclaimed oil composition C2. In other words, in this specific example 2, the object to be controlled by the composition control of the industrial oil composition

[0274] C1 after reclamation by means of the composition determination apparatus 5 is the circulation and reclamation cycle of the reclaimed oil composition C2 that is circulated and reclaimed in this system. Here, the composition determination apparatus 5 controls the functional additive to be added to the reclaimed oil composition C2 thereby controlling the service life of the industrial oil composition C1 after reclamation; this means that it also controls the circulation and reclamation cycle itself of the industrial oil composition C1 and the reclaimed oil composition C2.

[0275] More specifically, at the composition determination step (Step S9), the composition determination apparatus 5 controls and determines the composition of the industrial oil composition C1 after reclamation by controlling the strength or the addition amount of the functional additive so that the service life of the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2 will become the prescribed period. The composition determination apparatus 5 then outputs the control recipe R in accordance with this determined composition. In other words, the composition determination apparatus 5 outputs this control recipe R by changing the composition of the industrial oil composition C1 after reclamation to be produced by the production apparatus 1 in accordance with the prescribed service life of the industrial oil composition C1. The production apparatus 1 then produces the industrial oil composition C1 after reclamation based on this control recipe R. In this way, the composition determination apparatus 5 optimizes the service life of the industrial oil composition C1 after reclamation as desired, and thus optimizes the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2.

[0276] The prescribed service life of the industrial oil composition C1 after reclamation in the cycle control of the reclaimed oil composition C2 may be set as appropriate in accordance with, for example, the circulation and reclamation status of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system and the operating status and operation prediction of the entire control system Sys1 for circulation and reclamation of the industrial oil. In other words, the composition determination apparatus 5 controls the service life of the industrial oil composition C1 after reclamation so that the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2 is optimized in accordance with the circulation and reclamation status of the industrial oil composition C1 and the reclaimed oil composition C2, the operating status of the entire control system Sys1 for circulation and reclamation, and the operation prediction, among other things. In other words, in the control system Sys1 for circulation and reclamation of the industrial oil, the composition determination apparatus 5 controls, for example, the strength and addition amount of the functional additive to be added to the industrial oil composition C1 with the goal to optimize the circulation and reclamation cycle so that the industrial oil composition C1 and the reclaimed oil composition C2 are efficiently circulated and reclaimed without problems, and thereby controlling the service life of the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2.

[0277] When the service life of the industrial oil composition C1 after reclamation is made relatively long so that the service life thereof will become the prescribed period, the composition determination apparatus 5 makes the strength of the functional additive relatively high or the addition amount of the functional additive relatively large in the determination of the composition of the industrial oil composition C1 after reclamation. On the other hand, when the service life of the industrial oil composition C1 after reclamation is made relatively short so that the service life thereof will become the prescribed period, the composition determination apparatus 5 makes the strength of the functional additive relatively low or the addition amount of the functional additive relatively small in the determination of the composition of the industrial oil composition C1 after reclamation.

[0278] For example, when the control of the circulation and reclamation cycle of the reclaimed oil composition C2 illustrated in this specific example 2 is applied to the control system Sys1 for circulation and reclamation of the industrial oil having a plurality of the production apparatuses 1, the industrial oil use apparatuses 2, and the reclamation apparatuses 4, as illustrated in FIG. 18, the multiple circulation and reclamation cycles in these units are bundled together for a group control; with this, the entire system may be efficiently controlled. In this case, the composition determination apparatus 5 may control separately for each of multiple industrial oil use apparatuses 2 the composition of the industrial oil composition C1 after reclamation that is going to be re-used in these industrial oil use apparatuses 2. In other words, the composition determination apparatus 5 controls separately for each of the multiple industrial oil use apparatuses 2 the service life of the industrial oil composition C1 used in these industrial oil use apparatuses 2; with this, the circulation and reclamation cycles of the industrial oil composition C1 and the reclaimed oil composition C2 in the entire system are bundled and controlled for optimization as a whole.

[0279] Here, at the composition determination step (Step S9), as illustrated in FIG. 19, the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2, based on, in addition to the analysis results by the analysis apparatus 3 at the analysis step (Step S5) described above, the circulation and reclamation state of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, and various indicators for the operating status and operation prediction in the entire control system Sys1 for circulation and reclamation of the industrial oil.

[0280] More specifically, the composition is determined based on the circulation and reclamation state of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, and various indicators for the operating status and operation prediction in the entire control system Sys1 for circulation and reclamation of the industrial oil; examples of such indicator include the total circulation amount of the reclaimed oil composition C2, the deterioration trend of the industrial oil composition C1 caused by the use in the industrial oil use apparatus 2, the operation status of each industrial oil use apparatus 2, the operation prediction of each industrial oil use apparatus 2, the reclamation capacity of each reclamation apparatus 4, the operation rate of each reclamation apparatus 4, the production capacity of each production apparatus 1, the operation rate of each production apparatus 1, the transportation capacity of each transport carrier 6, the operation rate of each transport carrier 6, the storage capacity of each storage facility 7, and the operation rate of each storage facility 7.

[0281] In other words, in this case, at the composition determination step (Step S9), the composition determination apparatus 5 determines the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2, based on at least one of the following information: the result of the analysis by the analysis apparatus 3, the total circulation amount of the reclaimed oil composition C2, the deterioration trend of the industrial oil composition C1 caused by the use in the industrial oil use apparatus 2, the operation status of each industrial oil use apparatus 2, the operation prediction of each industrial oil use apparatus 2, the reclamation capacity of each reclamation apparatus 4, the operation rate of each reclamation apparatus 4, the production capacity of each production apparatus 1, the operation rate of each production apparatus 1, the transportation capacity of each transport carrier 6, the operation rate of each transport carrier 6, the storage capacity of each storage facility 7, and the operation rate of each storage facility 7. These indicators, for example, may be input to the composition determination apparatus 5 via the data input / output component of the data sensed at each unit, or they may be input to the composition determination apparatus 5 by operation of a worker via the operation input component. Based on these various indicators, the composition determination apparatus 5 monitors the entire control system Sys1 for circulation and reclamation of the industrial oil and the circulation and reclamation cycle of the industrial oil composition C1 and reclaimed oil composition C2, determines the composition of the industrial oil composition C1 after reclamation so that the circulation and reclamation cycle will be properly performed and the entire system operates efficiently, and controls the service life of the industrial oil composition C1.

[0282] Here, the total circulation amount of the reclaimed oil composition C2 is an indicator corresponding to the total amount of the reclaimed oil composition C2 that is circulated and reclaimed in the control system Sys1 for circulation and reclamation of the industrial oil. Typically, the composition determination apparatus 5 may determine the composition of the industrial oil composition

[0283] C1 after reclamation in accordance with the total circulated amount of the reclaimed oil composition C2 and control the service life of this industrial oil composition C1 so as to avoid a shortage or, conversely, an oversupply of the reclaimed oil composition C2, which is the raw material for the industrial oil composition C1 after reclamation. For example, when the total circulation amount of the reclaimed oil composition C2 is relatively small, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation will be relatively longer.

[0284] On the other hand, when the total circulation amount of the reclaimed oil composition C2 is relatively large, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation will be relatively shorter. This allows the composition determination apparatus 5 to control in accordance with the total circulation amount of the reclaimed oil composition C2.

[0285] The deterioration trend of the industrial oil composition C1 caused by the use in the industrial oil use apparatus 2 is typically an indicator in accordance with the degradation trend of the industrial oil composition C1, which can be ascertained by repeating multiple analyses of the industrial oil composition C1 after use in a particular industrial oil use apparatus 2. When the composition determination apparatus 5 is able to grasp the degradation trend of the industrial oil composition C1 used in the particular industrial oil use apparatus 2, it may determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the particular industrial oil use apparatus 2 in accordance with this degradation trend, and thereby controlling the service life of this industrial oil composition C1. This allows the composition determination apparatus 5 to control in accordance with the degradation trend of the industrial oil composition C1.

[0286] The operation status of the industrial oil use apparatus 2 is typically the operating condition of the industrial oil use apparatus 2 that uses the industrial oil composition C1. Examples of the condition include indicators with regard to operation environment of the industrial oil composition C1 (temperature and location of the installation, etc.), operation load and period in production of various products, various machining processing, and various equipment operations, among others, using the industrial oil composition C1. The operation prediction of the industrial oil use apparatus 2 is typically an indicator in accordance with the future demand prediction (e.g., prediction of increase or decrease in production) for production of various products, various machining processing, and various equipment operations, among others, conducted by the industrial oil use apparatus 2. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the operation status and operation prediction of the industrial oil use apparatus 2, and control the service life of said industrial oil composition C1. For example, when the operation of the industrial oil use apparatus 2 is expected to be relatively increased due to increase in demand, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation so that the service life of said industrial oil composition C1 will be relatively longer during production increase and peak demand period in order to minimize interruption of operation due to replacement work. On the other hand, when demand is expected to be decreased and the operation rate of the industrial oil use apparatus 2 is relatively low, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively shorter during reduced production and off-peak period. This allows the composition determination apparatus 5 to control the industrial oil use apparatus 2 in accordance with its operating status and operation prediction.

[0287] The reclamation capacity of the reclamation apparatus 4 is typically the indicator corresponding to the maximum amount of the reclaimed oil composition C2 that can be reclaimed per unit time in the reclamation apparatus 4, in other words, this is the reclamation capacity of the reclamation apparatus 4. The operation rate of the reclamation apparatus 4 is typically the indicator based on the ratio of the amount of the reclaimed oil composition C2 that is actually reclaimed to the maximum amount of the reclaimed oil composition C2 that can be reclaimed per unit time in the reclamation apparatus 4; in other words, this is the indicator that indicates how much of the reclamation capacity of the reclamation apparatus 4 is being used. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the reclamation capacity and operation rate of the reclamation apparatus 4, and then control the service life of said industrial oil composition C1. For example, when the operation rate of the reclamation apparatus 4 is relatively high and the reclamation capacity of the reclamation apparatus 4 has a little room, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively long so that the industrial oil composition C1 after use that is waiting for reclamation does not stagnate. On the other hand, when the operation rate of the reclamation apparatus 4 is relatively low and there is a sufficient room in the reclamation capacity of the reclamation apparatus 4, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively short. This allows the composition determination apparatus 5 to control in accordance with the reclamation capacity and operation rate of the reclamation apparatus 4.

[0288] The production capacity of the production apparatus 1 is typically the indicator in accordance with the maximum amount of the industrial oil composition C1 that can be produced per unit time in the production apparatus 1, in other words, this is the production capacity of the production apparatus 1. The operation rate of the production apparatus 1 is typically the indicator corresponding to the ratio of the amount of the industrial oil composition C1 actually produced to the maximum amount of the industrial oil composition C1 that can be produced per unit of time in the production apparatus 1, in other words, this is the indicator that indicates how much of the production capacity of the production apparatus 1 is being used. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the production capacity and operation rate of the production apparatus 1, and then control the service life of said industrial oil composition C1. For example, when the operation rate of the production apparatus 1 is relatively high and the production capacity of the production apparatus 1 has a little room, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively long so that the demand thereof is not excessive relative to the production supply of the industrial oil composition C1. On the other hand, when the operation rate of the production apparatus 1 is relatively low and there is a sufficient room in the production capacity of the production apparatus 1, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively short. This allows the composition determination apparatus 5 to control in accordance with the production capacity and operation rate of the production apparatus 1.

[0289] The transport capacity of the transport carrier 6 is typically the indicator corresponding to the maximum amount of the industrial oil composition C1 that can be transported per unit time in the transport carrier 6, in other words, this is the transport capacity of the transport carrier 6. The operation rate of the transport carrier 6 is typically the indicator corresponding to the ratio of the amount of industrial oil composition C1 actually transported to the maximum amount of the industrial oil composition C1 that can be transported per unit time in the transport carrier 6, in other words, this is the indicator of how much of the transport capacity of the transport carrier 6 is being used. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the transport capacity and operation rate of the transport carrier 6, and then control the service life of said industrial oil composition C1. For example, when the operation rate of the transport carrier 6 is relatively high and there is a little room in the transportation capacity of the transport carrier 6, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively long so that there is no delay in transporting the industrial oil composition C1 or the reclaimed oil composition C2. On the other hand, when the operation rate of the transport carrier 6 is relatively low and there is a sufficient room in the transport capacity of the transport carrier 6, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively short. This allows the composition determination apparatus 5 to control in accordance with the transport capacity and operation rate of the transport carrier 6.

[0290] The storage capacity of the storage facility 7 is typically the indicator corresponding to the maximum amount of the industrial oil composition C1 and the reclaimed oil composition C2 that can be stored in the storage facility 7, that is, the storage capacity of the storage facility 7. The operation rate of the storage facility 7 is typically the indicator corresponding to the ratio of the amount of the industrial oil composition C1 and the reclaimed oil composition C2 actually stored to the maximum amount of the industrial oil composition C1 and the reclaimed oil composition C2 that can be stored in the storage facility 7, in other words, this is an indicator of how much of the storage capacity of the storage facility 7 is being used. The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation in accordance with the storage capacity and operation rate of the storage facility 7, and then control the service life of said industrial oil composition C1. For example, when the operation rate of the storage facility 7 is relatively high and there is a little room in the storage capacity of the storage facility 7, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively long to avoid excess industrial oil composition C1 and reclaimed oil composition C2 in the unused state. On the other hand, when the operation rate of the storage facility 7 is relatively low and there is a sufficient room in the storage capacity of the storage facility 7, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 so that the service life of the industrial oil composition C1 after reclamation is relatively short. This allows the composition determination apparatus 5 to control in accordance with the storage capacity and operation rate of the storage facility 7.

[0291] The composition determination apparatus 5 typically determines the composition of the industrial oil composition C1 after reclamation and controls the circulation and reclamation cycle of the reclaimed oil composition C2 so that the service life of the industrial oil composition C1 after reclamation becomes the prescribed period by taking into account the aforementioned trend based on the aforementioned various indicators and balancing them comprehensively.

[0292] The composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation and control the circulation and reclamation cycle of the reclaimed oil composition C2 so that the service life of the industrial oil composition C1 after reclamation becomes the prescribed period, using techniques related to Artificial Intelligence and Deep Learning, for example.

[0293] In this case, the composition determination apparatus 5 may, for example, store a learned model M to be used for determining the composition of the industrial oil composition C1 after reclamation in the memory component in advance, and then determine based on this learned model M the composition of the industrial oil composition C1 after reclamation in accordance with aforementioned various indicators, and then perform the control so as to be in accordance with the situation indicated by these various indicators.

[0294] Here, the learned model M is typically a learned mathematical model that determines, based on the aforementioned various indicators, the composition of the industrial oil composition C1 for optimal control under the situation indicated by these various indicators. In other words, the learned model M is the model with the input: “the analysis results by the analysis apparatus 3, the total circulating amount of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1, the operation status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity of the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1, the operation rate of the production apparatus 1, the transport capacity of the transport carrier 6, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7, and the operation rate of the storage facility 7”, and the output: “the composition of the industrial oil composition C1 in order to perform an optimal control under the situation indicated by the aforementioned various indicators”.

[0295] In this case, for example, the control system Sys1 for circulation and reclamation of the industrial oil collects in advance the input: “the analysis results by the analysis apparatus 3, the total circulating volume of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1, the operation status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity of the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1, the operation rate of the production apparatus 1, the transport capacity of the transport carrier 6, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7, and the operation rate of the storage facility 7”, and the output: “the composition of the industrial oil composition C1 in order to perform an optimal control under the situation indicated by the aforementioned various indicators”, and then uses the data obtained by quantifying the above-mentioned input as the explanatory variables and the data obtained by quantifying the above-mentioned output as the objective variables, and further prepares a number of teacher data sets for learning by associating these data, and thereby performing machine learning using these teacher data sets for learning to generate the learned model M. Various forms of algorithms applicable to this form of learning may be used as the machine learning, such as deep learning, neural networks, random forests, logistic regression, ensemble learning, support vector machines, and naïve Bayes. The composition determination apparatus 5 stores the learned model M obtained by this machine learning in the memory component in advance.

[0296] The composition determination apparatus 5 then determines the composition of the industrial oil composition C1 after reclamation based on the learned model M that is stored in the memory component, and outputs the control recipe R. More specifically, the composition determination apparatus 5 actually inputs into the learned model M the quantified data of the analysis results by the analysis apparatus 3, the total circulating amount of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1, the operation status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity of the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1, the operation rate of the production apparatus 1, the transport capacity of the transport carrier 6, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7, and the operation rate of the storage facility 7. With this, from the learned model M the composition determination apparatus 5 outputs the composition of the industrial oil composition C1 for optimal control in the situation indicated by the aforementioned various indicators to determine the composition of the industrial oil composition C1 after reclamation.

[0297] In this way, the composition determination apparatus 5 determines based on the aforementioned various indicators the composition of the industrial oil composition C1 after reclamation so that the service life of the industrial oil composition C1 after reclamation becomes the prescribed period, and thereby allowing to control the circulation and reclamation cycle of the reclaimed oil composition C2 as well.

[0298] The control system Sys1 for circulation and reclamation of the industrial oil controls the service life of the industrial oil composition C1 that is circulated and reclaimed in the system in the way as described above, and thereby controls the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2; and with this, the entire system can be operated efficiently by optimizing the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2 in accordance with the conditions of the entire system.

[0299] As a result, the control system Sys1 for circulation and reclamation of the industrial oil can contribute to the real world not only in terms of CO2 reduction and carbon neutrality, but also in terms of so-called SDGs, an environmental load reduction, and a circular economy.

[0300] For example, when the control system Sys1 for circulation and reclamation of the industrial oil controls by means of the group control the service life of the industrial oil composition C1 by bundling the circulation and reclamation cycles together for multiple industrial oil use apparatuses 2, for example, the recovery timing to recover the industrial oil composition C1 after use from multiple industrial oil use apparatuses 2 in neighboring areas may be aligned. This allows the control system Sys1 for circulation and reclamation of the industrial oil, for example, to collect the industrial oil composition C1 after use from a plurality of the industrial oil use apparatuses 2 collectively by only one transport carrier 6, thereby improving the efficiency of transportation. In this case, the collection timing of the industrial oil composition C1 after use from the industrial oil use apparatus 2 can typically be any time within the service life of the industrial oil composition C1, but if the collection timing is too early for the service life, relatively more functional additive that is not consumed and wasted in the industrial oil composition C1 after use will remain. Therefore, it is preferable that the collection timing is somewhat closer to the end of the service life of the industrial oil composition C1. In contrast, the control system Sys1 for circulation and reclamation of the industrial oil controls the service life of the industrial oil composition C1 after reclamation by determining the composition of each industrial oil composition C1 so that the ends of service life of each industrial oil composition C1 to be used in multiple industrial oil use apparatuses 2, which are subject to collection of the industrial oil composition C1 after use in these multiple industrial oil use apparatuses 2 at the same time period, are aligned; then, this allows for improved transportation efficiency and reduced transportation load, as well as reduced waste of the functional additive.

[0301] On the other hand, the control system Sys1 for circulation and reclamation of the industrial oil can also control, for example, so as to dare to stagger the collection timing of the industrial oil composition C1 after use from multiple industrial oil use apparatuses 2. For example, depending on the operating conditions of the production apparatus 1, the reclamation apparatus 4, the transport carrier 6, and the storage facility 7, if the control system Sys1 for circulation and reclamation of the industrial oil collects the industrial oil composition C1 after use from multiple industrial oil use apparatuses 2 at once, the production apparatus 1, the reclamation apparatus 4, the transport carrier 6, the storage facility 7, and so forth will not be able to process it in time, which may cause a stagnation in the circulation and reclamation of the industrial oil composition C1 and the reclaimed oil composition C2. On the other hand, for example, under the situation where the operation rates of the production apparatus 1, the reclamation apparatus 4, the transport carrier 6, the storage facility 7, and so forth are relatively high, the control system Sys1 for circulation and reclamation of the industrial oil in this embodiment may determine the composition of each industrial oil composition C1 and control the service life of the industrial oil composition C1 after reclamation so that the collection timing of the industrial oil composition C1 after use from the multiple industrial oil use apparatuses 2 is intentionally dispersed; with this, it is possible to suppress the waste of the functional additive, and in addition, the entire system may be operated efficiently with preventing stagnation in the circulation and reclamation of the industrial oil composition C1 and the reclaimed oil composition C2.

[0302] When the control system Sys1 for circulation and reclamation of the industrial oil aligns or disperses the collection timing of the industrial oil composition C1 after use from the multiple industrial oil use apparatuses 2 as described above, it is also possible to control so that the service life of the industrial oil composition C1 is intentionally shortened. In any case, when the control system Sys1 for circulation and reclamation of the industrial oil controls separately for each of the multiple industrial oil use apparatuses 2 the service life of the industrial oil composition C1 that is used in these industrial oil use apparatuses 2, based on the operation rate of each unit and the balance between supply and demand of the industrial oil composition C1 and the reclaimed oil composition C2, it is possible to optimize the circulation and reclamation cycle in the entire system.

[0303] When the control system Sys1 for circulation and reclamation of the industrial oil controls the service life of the industrial oil composition C1 that is circulated and reclaimed in the system in the way as described above, and thereby controls the circulation and reclamation cycle of the industrial oil composition C1 and reclaimed oil composition C2, for example, the replacement timing of the industrial oil composition C1 and the like may be properly controlled and announced.

[0304] As a result, the control system Sys1 for circulation and reclamation of the industrial oil can, for example, provide a society with various public benefits, such as an overall system optimization, a circulation and reclamation cycle without interruption or stagnation, control of undersupply or oversupply of the industrial oil composition C1, control of excess recovery that does not match operation capacity, improvement of overall operation rate of the system, smooth and waste-free system operation, optimal operation of storage and transportation, reduction of transportation load, reduction of fossil fuel consumption, and improvement of corporate added value and corporate image through participation in efforts to reduce environmental impact.Action Effects of the Embodiment

[0305] The control system Sys1 for circulation and reclamation of the industrial oil described above is composed of: the industrial oil use apparatus 2 that uses the industrial oil composition C1 containing the base oil and the functional additive, the reclamation apparatus 4 that produces the reclaimed oil composition C2 containing the base oil from the industrial oil composition C1 after use that is recovered from the industrial oil use apparatus 2, the composition determination apparatus 5 that determines the composition of the industrial oil composition C1 after reclamation to be used in the industrial oil use apparatus 2, and the production apparatus 1 that produces the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 by adding the functional additive to the reclaimed oil composition C2 after reclamation based on the composition determined by the composition determination apparatus 5, in which at the time of determining the composition the composition determination apparatus 5 controls the industrial oil composition C1 that is circulated and reclaimed by controlling the functional additive to be added into the reclaimed oil composition C2.

[0306] The control method for circulation and reclamation of the industrial oil described above includes: the industrial oil use step (Step S3) at which the industrial oil composition C1 containing the base oil and the functional additive is used in the industrial oil use apparatus 2, the recovery step (Step S4) at which the industrial oil composition C1 after use is recovered from the industrial oil use apparatus 2, the reclamation step (Step S7) at which the reclaimed oil composition C2 containing the base oil is reclaimed from the recovered industrial oil composition C1 after use, the composition determination step (Step S9) at which the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is determined, the production step (Step S11) at which based on the composition determined at the composition determination step (S9), the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is produced by adding the functional additive to the reclaimed oil composition C2 after reclamation, and the industrial oil re-use step (Step S13) at which the industrial oil composition C1 after reclamation that is produced at the production step (Step S11) is re-used in the industrial oil use apparatus 2, in which at the composition determination step (Step S9), the industrial oil composition C1 that is circulated and reclaimed is controlled by controlling the functional additive to be added to the reclaimed oil composition C2 at the determination of the composition.

[0307] The control method for circulation and reclamation of the industrial oil described above includes: the recovery step (Step S4) at which the industrial oil composition C1 after use is recovered from the industrial oil use apparatus 2 that uses the industrial oil composition C1 containing the base oil and the functional additive, the reclamation step (Step S7) at which the reclaimed oil composition C2 containing the base oil is reclaimed from the recovered industrial oil composition C1 after use, the composition determination step (Step S9) at which the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is determined, and the production step (Step S11) at which the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is produced by adding the functional additive to the reclaimed oil composition C2 after reclamation based on the composition determined at the composition determination step (Step S9), in which at the composition determination step (Step S9), the industrial oil composition C1 that is going to be circulated and reclaimed is controlled by controlling the functional additive to be added to the reclaimed oil composition C2 at the determination of the composition.

[0308] With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can properly circulate and reclaim the industrial oil composition C1 that is used in the industrial oil use apparatus 2. As a result, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can contribute widely to the real world not only in terms of CO2 reduction and carbon neutrality, but also in terms of so-called SDGs, an environmental load reduction, and a circular economy.

[0309] The control system Sys1 for circulation and reclamation of the industrial oil described above may have the analysis apparatus 3 that analyzes the state of the recovered industrial oil composition C1 after use, and the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 based on the analysis results by the analysis apparatus 3. The control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above may also include the analysis step (Step S5) at which the state of the recovered industrial oil composition C1 after use is analyzed, and at the composition determination step (Step S9), based on the analysis results at the analysis step (Step S5), the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 may be determined. In this case, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can properly control the industrial oil composition C1 that is circulated and reclaimed in accordance with the analysis results of the actual industrial oil composition C1 after use.

[0310] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the composition determination apparatus 5 may determine the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 based on at least one of the followings: the total circulating amount of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1 associated with the use in the industrial oil use apparatus 2, the operating status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity to reclaim the reclaimed oil composition C2 from the industrial oil composition C1 after use in the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1 that produces the industrial oil composition C1, the operation rate of the production apparatus 1, the transporting capacity of the transport carrier 6 that transports the industrial oil composition C1 or the reclaimed oil composition C2 among the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7 that stores the industrial oil composition C1 or the reclaimed oil composition C2, and the operation rate of the storage facility 7. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, at the composition determination step (Step S9), the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 may be determined based on at least one of the followings: the total circulating amount of the reclaimed oil composition C2, the degradation trend of the industrial oil composition C1 associated with the use in the industrial oil use apparatus 2, the operating status of the industrial oil use apparatus 2, the operation prediction of the industrial oil use apparatus 2, the reclamation capacity to reclaim the reclaimed oil composition C2 from the industrial oil composition C1 after use in the reclamation apparatus 4, the operation rate of the reclamation apparatus 4, the production capacity of the production apparatus 1 that produces the industrial oil composition C1, the operation rate of the production apparatus 1, the transporting capacity of the transport carrier 6 that transports the industrial oil composition C1 or the reclaimed oil composition C2 among the production apparatus 1, the industrial oil use apparatus 2, and the reclamation apparatus 4, the operation rate of the transport carrier 6, the storage capacity of the storage facility 7 that stores the industrial oil composition C1 or the reclaimed oil composition C2, and the operation rate of the storage facility 7. In this case, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can properly control the industrial oil composition C1 that is circulated and reclaimed in accordance with the circulation and reclamation status of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, the operation status and operation prediction of the entire control system Sys1 for circulation and reclamation of the industrial oil, and the like, thereby allowing to efficiently operate the entire system through this control.

[0311] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the control of the industrial oil composition C1 includes control of the quality of the industrial oil composition C1 after use that has passed the pre-assumed use period, in which the composition determination apparatus 5, when determining the composition of the industrial oil composition C1 after reclamation, may control the quality of the industrial oil composition C1 after use that has passed the use period by adding the functional additive to the reclaimed oil composition C2. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, the control of the industrial oil composition C1 includes the control of the quality of the industrial oil composition C1 after use that has passed the pre-assumed use period; and at the composition determination step (Step S9), in determining the composition of the industrial oil composition C1 after reclamation, the quality of the industrial oil composition C1 after use that has passed the use period may be controlled by adding the functional additive to the reclaimed oil composition C2. In this case, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can control the quality of the industrial oil composition C1 after use that has passed the pre-assumed use period to an intended quality by controlling the functional additive that is added to the reclaimed oil composition C2 at the time when producing the industrial oil composition C1 after reclamation.

[0312] More specifically, in the control system Sys1 for circulation and reclamation of the industrial oil described above, the composition determination apparatus 5 controls the composition of the industrial oil composition C1 after reclamation so that the quality of the industrial oil composition C1 after use that has passed the use period becomes an intended quality. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, at the composition determination step (Step S9), the composition of the industrial oil composition C1 after reclamation is controlled so that the quality of the industrial oil composition C1 after use that has passed the use period becomes an intended quality. With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can compatibly achieve, for example, the protection of the reclaimed oil composition C2 containing the base oil and the waste control of the functional additive with good balance, as described above.

[0313] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the control of the industrial oil composition C1 includes the control of the circulation and reclamation cycle of the reclaimed oil composition C2 that is circulated and reclaimed; and when determining the composition of the industrial oil composition C1 after reclamation, the composition determination apparatus 5 may control the circulation and reclamation cycle of the reclaimed oil composition C2 by controlling the functional additive that is added to the reclaimed oil composition C2. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, the control of the industrial oil composition C1 includes the control of the circulation and reclamation cycle of the reclaimed oil composition C2 that is circulated and reclaimed; and in the composition determination step (Step S9), in determining the composition of the industrial oil composition C1 after reclamation, the circulation and reclamation cycle of the reclaimed oil composition C2 may be controlled by controlling the functional additive that is added to the reclaimed oil composition C2. In this case, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can optimally control the circulation and reclamation cycle of the industrial oil composition C1 and the reclaimed oil composition C2 in harmony with the circulation and reclamation state of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, the operation state of the entire control system Sys1 for circulation and reclamation of the industrial oil, and the like by controlling the functional additive to be added to the reclaimed oil composition C2 at the time when producing the industrial oil composition C1 after reclamation.

[0314] More specifically, in the control system Sys1 for circulation and reclamation of the industrial oil described above, the composition determination apparatus 5 controls the composition of the industrial oil composition C1 after reclamation so that the service life of the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2 will be the prescribed period. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, the composition of the industrial oil composition C1 after reclamation is controlled in the composition determination step (Step S9) so that the service life of the industrial oil composition C1 after reclamation in the industrial oil use apparatus 2 becomes the prescribed period. With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can optimize the service life of the industrial oil composition C1 in accordance with the circulation and reclamation status of the industrial oil composition C1 and the reclaimed oil composition C2 that are circulated and reclaimed in this system, the operation status of the entire control system Sys1 for circulation and reclamation of the industrial oil, and the like; thus, for example, it is possible to control the recovery timing of the industrial oil composition C1 after use, improve the operation rate of each equipment, and optimize the supply-demand relationship of the industrial oil composition C1 and the reclaimed oil composition C2.

[0315] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the composition determination apparatus 5 separately controls for each of the multiple industrial oil use apparatuses 2 the composition of the industrial oil composition C1 after reclamation that is going to be re-used in these industrial oil use apparatuses 2. The control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above controls separately for each of the multiple industrial oil use apparatuses 2 at the composition determination step (Step S9) the composition of the industrial oil composition C1 after reclamation that is going to be re-used in these industrial oil use apparatuses 2. With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition control separately for each of the multiple industrial oil use apparatuses 2 the composition of the industrial oil composition C1 that is used in these industrial oil use apparatuses 2, thereby allowing to control the circulation and reclamation cycle of the industrial oil composition C1 that is used in the multiple industrial oil use apparatuses 2 by means of a group control; with this, the efficiency of the entire system can be properly improved.

[0316] In the control system Sys1 for circulation and reclamation of the industrial oil described above, the industrial oil composition C1 includes a mineral oil (A1) or a synthetic oil (A2) as the base oil, a neutral phosphite derivative represented by the following formula (B) and a 2,6-di-t-butylphenol derivative represented by the following formula (C) as the antioxidant, and a functional additive; the reclamation apparatus 4 reclaims the reclaimed oil composition C2 containing the base oil from the industrial oil composition C1 after use by the refining treatment of the industrial oil composition C1 after use, in which as the refining treatment, adsorption, or hydrogenation desulfurization, or vacuum distillation is performed, the production apparatus 1 produces the industrial oil composition C1 after reclamation by adding the antioxidant and the functional additive to the reclaimed oil composition C2 after reclamation; and as compared to the industrial oil composition C1 before use in the industrial oil use apparatus 2, the content of the functional additive is lower in the industrial oil composition C1 after use. In the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition described above, the industrial oil composition C1 includes the mineral oil (A1) or the synthetic oil (A2) as the base oil, the neutral phosphite derivative represented by the following formula (B) and the 2,6-di-t-butylphenol derivative represented by the following formula (C) as the antioxidant, and the functional additive; at the reclamation step (Step S7) the reclaimed oil composition C2 containing the base oil is reclaimed from the industrial oil composition C1 after use by the refining treatment of the industrial oil composition C1 after use, in which as the refining treatment, adsorption, or hydrogenation desulfurization, or vacuum distillation is performed; the production step (Step S11) includes the addition step at which the antioxidant and the functional additive are added to the reclaimed oil composition C2 after reclamation; and as compared to the industrial oil composition C1 before use in the industrial oil use apparatus 2, the content of the functional additive is lower in the industrial oil composition C1 after use. With this configuration, the control system Sys1 for circulation and reclamation of the industrial oil, the control method for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition can use the reclaimed oil composition C2 not as the reclaimed industrial oil composition for fuel, but as the industrial oil composition C1 after reclamation for machine lubrication, metal processing, or the like in the industrial oil use apparatus 2; thus, this contributes to the CO2 reduction and to the carbon neutrality.(In the formula (B), Rb21 to Rb24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms, Rb25 to Rb28 each independently represent a linear or a branched alkyl group having 1 to 6 carbon atoms, Rb291 and Rb292 each independently represent a hydrogen atom, or a linear or a branched alkyl group having 1 to 5 carbon atoms, and a total number of carbon atoms of Rb291 and Rb292 is 1 to 5.)(In the formula (C), Rc1 represents a linear or a branched alkyl group having 1 to 12 carbon atoms.)MODIFIED EXAMPLESThe control method for circulation and reclamation of the industrial oil, the control system for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition according to the embodiment of the present invention are not limited to the above-described embodiments, and thus, various modifications are possible within the scope of the claims.In the above explanation, the control system Sys1 for circulation and reclamation of the industrial oil is described as having the production apparatus 1, the industrial oil use apparatus2, the analysis apparatus 3, the reclamation apparatus 4, the composition determination apparatus 5, the transport carrier 6, and the storage facility 7, but it is not limited to this; for example, it does not necessarily have the analysis apparatus 3, the transport carrier 6, the storage facility 7, or the like.In the above explanation, the industrial oil composition C1 is described as being used for machine lubrication or metal processing in the industrial oil use apparatus 2, but it is not limited to these and may be used for other purposes.

[0320] In the above explanation, typically, the recovery step (Step S4) is performed by the transport carrier 6 and the like, the reclamation step (Step S7) is performed by the reclamation apparatus 4, the composition determination step (Step S9) is performed by the composition determination apparatus 5, and the production step (Step S11) is performed by the production apparatus 1. However, this is not limited to these, and some or all of these steps may be performed manually. For example, the composition determination step (Step S9) may be performed without using the composition determination apparatus 5.

[0321] The industrial oil composition C1 described above is not limited to the above examples as far as it contains at least the base oil and the functional additive. In the above explanation, it is described in the way that the control method for circulation and reclamation of the industrial oil and the production method for the reclaimed industrial oil composition includes the analysis step (Step S5) for analyzing the state of the recovered industrial oil composition C1 after use, and at the composition determination step (Step S9), based on the analysis results in the analysis step (Step S5), the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the industrial oil use apparatus 2 is determined, but it is not limited to this. For example, when the degradation tendency of the industrial oil composition C1 after use in the specific industrial oil use apparatus 2 has been analyzed multiple times, and thereby the degradation tendency of the industrial oil composition C1 after use in the specific industrial oil use apparatus 2 is obtained, at the composition determination step (Step S9), the composition of the industrial oil composition C1 after reclamation that is going to be re-used in the specific industrial oil use apparatus 2 may be determined in accordance with the obtained degradation tendency without analyzing each time the status of the industrial oil composition C1 after use and thereby it may be determined without using the analysis results.

[0322] In the above explanation, the composition determination apparatus 5 is described as controlling the strength of functional additives in 3 stages, the addition amount of the functional additive in 5 stages, and the combination of strength and addition amount in a total of 15 stages, but it is not limited to this; thus, the composition may be controlled without stages within the range described in the section <Industrial oil composition to be controlled>.

[0323] The control method for circulation and reclamation of the industrial oil, the control system for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition may be configured by combining as appropriate the configuration components of the embodiments and modifications described above.REFERENCE SIGNS LIST1 Production apparatus

[0325] 2 Industrial oil use apparatus

[0326] 3 Analysis apparatus

[0327] 4 Reclamation apparatus

[0328] 5 Composition determination apparatus

[0329] 6 Transport carrier

[0330] 7 Storage facility

[0331] C1 Industrial oil composition

[0332] C1a Analytical sample container / collection kit

[0333] C2 Reclaimed oil composition

[0334] M Learned model

[0335] P1 Production plant

[0336] P2 Use plant

[0337] P3 Reclamation plant

[0338] R Control recipe

[0339] Sys1 Control system for circulation and reclamation of industrial oil

Examples

embodiment

[0030]A control system Sys1 for circulation and reclamation of the industrial oil according to this embodiment illustrated in FIG. 1 has a production apparatus 1, an industrial oil use apparatus 2, an analysis apparatus 3, a reclamation apparatus 4, a composition determination apparatus 5, a transport carrier 6, and a storage facility 7. The control system Sys1 for circulation and reclamation of the industrial oil according to this embodiment constitutes the system that enables to properly circulate and reclaim an industrial oil composition C1 used in the industrial oil use apparatus 2 by making these units cooperate with each other.

[0031]Typically, the control system Sys1 for circulation and reclamation of the industrial oil uses in the industrial oil use apparatus 2 the industrial oil composition C1 produced by the production apparatus 1, and then recovers said industrial oil composition C1 after use and generates a reclaimed oil composition C2 by the reclamation apparatus 4. The ...

modified examples

The control method for circulation and reclamation of the industrial oil, the control system for circulation and reclamation of the industrial oil, and the production method for the reclaimed industrial oil composition according to the embodiment of the present invention are not limited to the above-described embodiments, and thus, various modifications are possible within the scope of the claims.

In the above explanation, the control system Sys1 for circulation and reclamation of the industrial oil is described as having the production apparatus 1, the industrial oil use apparatus2, the analysis apparatus 3, the reclamation apparatus 4, the composition determination apparatus 5, the transport carrier 6, and the storage facility 7, but it is not limited to this; for example, it does not necessarily have the analysis apparatus 3, the transport carrier 6, the storage facility 7, or the like.

In the above explanation, the industrial oil composition C1 is described as being used for machi...

Claims

1. A control method for circulation and reclamation of an industrial oil, the control method comprising:a recovery step at which from an industrial oil use apparatus that uses an industrial oil composition containing a base oil and a functional additive, the industrial oil composition after use is recovered;a reclamation step at which from the industrial oil composition after the use that is recovered, a reclaimed oil composition containing the base oil is reclaimed;a composition determination step at which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is determined; anda production step at which based on the composition determined at the composition determination step, the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use apparatus is produced by adding the functional additive to the reclaimed oil composition after reclamation, whereinat the composition determination step, in determining the composition, the industrial oil composition that is circulated and reclaimed is controlled by controlling the functional additive that is added to the reclaimed oil composition.

2. The control method for circulation and reclamation of the industrial oil according to claim 1, whereinthe control method comprises an analysis step at which a state of the industrial oil composition after the use that is recovered is analyzed, andat the composition determination step, based on analysis results at the analysis step, the composition of the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use apparatus is determined.

3. The control method for circulation and reclamation of the industrial oil according to claim 1, whereinat the composition determination step, the composition of the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use apparatus is determined based on at least one of: a total circulating amount of the reclaimed oil composition, a degradation trend of the industrial oil composition associated with the use in the industrial oil use apparatus, an operating status of the industrial oil use apparatus, an operation prediction of the industrial oil use apparatus, a reclamation capacity of a reclamation apparatus to reclaim the reclaimed oil composition from the industrial oil composition after the use, an operation rate of the reclamation apparatus, a production capacity of a production apparatus that produces the industrial oil composition, an operation rate of the production apparatus, a transporting capacity of a transport carrier that transports the industrial oil composition or the reclaimed oil composition among the production apparatus, the industrial oil use apparatus, and the reclamation apparatus, an operation rate of the transport carrier, a storage capacity of a storage facility that stores the industrial oil composition or the reclaimed oil composition, and an operation rate of the storage facility.

4. The control method for circulation and reclamation of the industrial oil according to claim 1, whereinthe control of the industrial oil composition includes control of quality of the industrial oil composition after the use that has passed a pre-assumed use period, andat the composition determination step, in determination of the composition, the quality of the industrial oil composition after the use that has passed the use period is controlled by controlling the functional additive that is added to the reclaimed oil composition.

5. The control method for circulation and reclamation of the industrial oil according to claim 4, whereinat the composition determination step, the composition of the industrial oil composition after the reclamation is controlled so that the quality of the industrial oil composition after the use that has passed the use period becomes a prescribed quality.

6. The control method for circulation and reclamation of the industrial oil according to claim 1, whereinthe control of the industrial oil composition includes control of a circulation and reclamation cycle of the reclaimed oil composition that is circulated and reclaimed, andat the composition determination step, in determination of the composition, the circulation and reclamation cycle of the reclaimed oil composition is controlled by controlling the functional additive that is added to the reclaimed oil composition.

7. The control method for circulation and reclamation of the industrial oil according to claim 6, whereinat the composition determination step, the composition of the industrial oil composition after the reclamation is controlled so that a service life of the industrial oil composition after the reclamation in the industrial oil use apparatus is a prescribed period.

8. The control method for circulation and reclamation of the industrial oil according to claim 1, whereinat the composition determination step, for each of the multiple industrial oil use apparatuses, the composition of the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use apparatuses is controlled separately.

9. The control method for circulation and reclamation of the industrial oil according to claim 1, whereinthe industrial oil composition comprises:a mineral oil (A1) or a synthetic oil (A2) as the base oil,a neutral phosphite ester derivative represented by the following formula (B) and a 2,6-di-t-butylphenol derivative represented by the following formula (C), as antioxidants, andthe functional additive, andat the reclamation step, by a refining treatment step at which the industrial oil composition after the use is refined, the reclaimed oil composition containing the base oil is reclaimed from the industrial oil composition after the use, and as the refining treatment, adsorption, hydrogenation desulfurization, or vacuum distillation is performed, andat the production step, an addition step at which the antioxidants and the functional additive are added to the reclaimed oil composition after the reclamation is included, andas compared to the industrial oil composition before use in the industrial oil use apparatus, a content of the functional additive is lower in the industrial oil composition after the use(in the formula (B), Rb21 to Rb24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms, Rb25 to Rb28 each independently represent a linear or a branched alkyl group having 1 to 6 carbon atoms, Rb291 and Rb292 each independently represent a hydrogen atom, or a linear or a branched alkyl group having 1 to 5 carbon atoms, and a total number of carbon atoms of Rb291 and Rb292 is 1 to 5)(in the formula (C), Rc1 represents a linear or a branched alkyl group having 1 to 12 carbon atoms).

10. A control system for circulation and reclamation of an industrial oil, the control system comprising:a reclamation apparatus with which a reclaimed oil composition containing a base oil is reclaimed from an industrial oil composition after use comprising the base oil and a functional additive that is recovered from an industrial oil use apparatus that uses the industrial oil composition;a composition determination apparatus with which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is determined; anda production apparatus with which based on the composition determined by the composition determination apparatus, the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is produced by adding the functional additive to the reclaimed oil composition after reclamation, whereinthe composition determination apparatus controls, in determining the composition, the industrial oil composition that is circulated and reclaimed by controlling the functional additive that is added to the reclaimed oil composition.

11. The control system for circulation and reclamation of the industrial oil according to claim 10, whereinthe control system comprises an analysis apparatus with which a state of the industrial oil composition after the use that is recovered from the industrial oil use apparatus is analyzed, andthe composition determination apparatus determines based on analysis results at the analysis apparatus, the composition of the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use apparatus.

12. The control system for circulation and reclamation of the industrial oil according to claim 10 or 11, whereinthe industrial oil composition comprises:a mineral oil (A1) or a synthetic oil (A2) as the base oil,a neutral phosphite ester derivative represented by the following formula (B) and a 2,6-di-t-butylphenol derivative represented by the following formula (C) as antioxidants, andthe functional additive, andthe reclamation apparatus reclaims, by refining treatment of the industrial oil composition after the use, the reclaimed oil composition containing the base oil from the industrial oil composition after the use, and as the refining treatment, adsorption, hydrogenation desulfurization, or vacuum distillation is performed,the production apparatus produces the industrial oil composition after the reclamation by adding the antioxidants and the functional additive to the reclaimed oil composition after the reclamation, andas compared to the industrial oil composition before use in the industrial oil use apparatus, a content of the functional additive is lower in the industrial oil composition after the use(in the formula (B), Rb21 to Rb24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms, Rb25 to Rb28 each independently represent a linear or a branched alkyl group having 1 to 6 carbon atoms, Rb291 and Rb292 each independently represent a hydrogen atom, or a linear or a branched alkyl group having 1 to 5 carbon atoms, and a total number of carbon atoms of Rb291 and Rb292 is 1 to 5)(in the formula (C), Rc1 represents a linear or a branched alkyl group having 1 to 12 carbon atoms).

13. A production method for a reclaimed industrial oil composition, the production method comprising:a recovery step at which from an industrial oil use apparatus that uses an industrial oil composition containing a base oil and a functional additive, the industrial oil composition after use is recovered;a reclamation step at which from the industrial oil composition after the use that is recovered, a reclaimed oil composition containing the base oil is reclaimed;a composition determination step at which a composition of the industrial oil composition after reclamation that is going to be re-used in the industrial oil use apparatus is determined; anda production step at which based on the composition determined at the composition determination step, the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use apparatus is produced by adding the functional additive to the reclaimed oil composition after reclamation, whereinat the composition determination step, in determination of the composition, the industrial oil composition that is circulated and reclaimed is controlled by controlling the functional additive that is added to the reclaimed oil composition.

14. The production method for the reclaimed industrial oil composition according to claim 13, whereinthe production method comprises an analysis step at which a state of the industrial oil composition after the use that is recovered is analyzed, andat the composition determination step, based on analysis results at the analysis step, the composition of the industrial oil composition after the reclamation that is going to be re-used in the industrial oil use apparatus is determined.

15. The production method for the reclaimed industrial oil composition according to claim 13, whereinthe industrial oil composition comprises:a mineral oil (A1) or a synthetic oil (A2) as the base oil,a neutral phosphite ester derivative represented by the following formula (B) and a 2,6-di-t-butylphenol derivative represented by the following formula (C), as antioxidants, andthe functional additive, andat the reclamation step, by a refining treatment step at which the industrial oil composition after the use is refined, the reclaimed oil composition containing the base oil is reclaimed from the industrial oil composition after the use, and as the refining treatment, adsorption, hydrogenation desulfurization, or vacuum distillation is performed, andat the production step, an addition step at which the antioxidants and the functional additive are added to the reclaimed oil composition after the reclamation is included, andas compared to the industrial oil composition before use in the industrial oil use apparatus, a content of the functional additive is lower in the industrial oil composition after the use(in the formula (B), Rb21 to Rb24 each independently represent an aliphatic hydrocarbon group having 10 to 16 carbon atoms, Rb25 to Rb28 each independently represent a linear or a branched alkyl group having 1 to 6 carbon atoms, Rb291 and Rb292 each independently represent a hydrogen atom, or a linear or a branched alkyl group having 1 to 5 carbon atoms, and a total number of carbon atoms of Rb291 and Rb292 is 1 to 5)(in the formula (C), Rc1 represents a linear or a branched alkyl group having 1 to 12 carbon atoms).

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