Anti-wear hydraulic oil composition produced by using recycled base oil and preparation method thereof

Abstract

The present invention provides an anti-wear hydraulic oil composition produced by using regenerated base oil, which is composed of the following components in weight percentage: (A) 39.0%-99% of regenerated base oil of various viscosity grades, (B) 0.01%-60.0% of cycloalkyl base oil or aromatic base oil, (C) 0.05%-0.30% of detergent, (D) 0.10%-0.50% of antioxidant, (E) 0.10%-0.50% of extreme pressure anti-wear agent, (F) 0.05%-0.50% of antioxidant and anti-corrosion agent, (G) 0.10%-0.30% of rust inhibitor, (H) 0.05%-0.30% of pour point depressant, (I) 0.001%-0.03% of demulsifier, and (J) 0.001%-0.03% of anti-foaming agent. The present invention also provides a preparation method thereof. The anti-wear hydraulic oil of the invention has stable performance, convenient preparation, excellent performance and broad market promotion prospect.

Description

Technical Field

[0001] The invention relates to an anti-wear hydraulic oil composition produced by utilizing regenerated base oil and a preparation method thereof. Background Art

[0002] At present, a large amount of lubricating oil is consumed every year in the world, and a large amount of waste lubricating oil is generated. With the increasingly tense world energy situation and the increasing attention paid to environmental protection, the necessity and importance of waste lubricating oil recycling and regeneration have become increasingly prominent. Regenerating waste lubricating oil not only saves energy, but also protects the environment. Summary of the invention

[0003] In order to solve the problems existing in the prior art, the present invention provides an anti-wear hydraulic oil composition produced by using recycled base oil and a preparation method thereof. The present invention responds to the national policy call of "protecting the environment and saving energy" and uses the recycled base oil produced by Gansu Zhongkelong Energy Environment Co., Ltd., combined with a variety of additives, to produce HM series anti-wear hydraulic oils with viscosity grades of 32, 46, and 68. The produced HM series anti-wear hydraulic oils meet the specifications of GB / T11118.1-2011 and are suitable for various large-scale engineering machinery such as loaders, excavators, bulldozers, cranes and other hydraulic systems. It can also be used for hydraulic transmission systems mainly based on plunger pumps and vane pumps.

[0004] The present invention provides an anti-wear hydraulic oil composition produced by using a regenerated base oil, wherein the anti-wear hydraulic oil composition is composed of the following components in percentage by weight:

[0005] (A) 39.0%-99% of recycled base oils of various viscosity grades,

[0006] (B) 0.01% to 60.0% of naphthenic base oil or aromatic base oil,

[0007] (C) 0.05%-0.30% detergent,

[0008] (D) 0.10%-0.50% antioxidant,

[0009] (E) 0.10%-0.50% extreme pressure anti-wear agent,

[0010] (F) 0.05%-0.50% antioxidant and antiseptic,

[0011] (G) 0.10%-0.30% rust inhibitor,

[0012] (H) 0.05%-0.30% pour point depressant,

[0013] (I) 0.001% to 0.03% of an anti-emulsifier,

[0014] (J) 0.001%-0.03% anti-foaming agent;

[0015] Wherein, the detergent (C) is a high-based or super-based sulfonate;

[0016] The antioxidant (D) is a dialkylphenol or a dialkyldiphenylamine;

[0017] The extreme pressure anti-wear agent (E) is a sulfur, phosphorus or nitrogen compound;

[0018] The antioxidant and anticorrosive agent (F) is a zinc dialkyl dithiophosphate (ZDDP) compound;

[0019] The rust inhibitor (G) is an organic sulfonic acid barium salt or an olefin succinic acid / ester;

[0020] The pour point depressant (H) is a poly-α-olefin;

[0021] The demulsifier (I) is a copolymer of acrylate and ether or a condensate of amine and ethylene oxide;

[0022] The antifoaming agent (J) is methyl silicone oil.

[0023] Preferably, the regenerated base oil is a paraffin-based regenerated base oil with a viscosity grade of 75SN, 100SN, 150SN, 250SN or 350SN; and / or

[0024] The detergent is an overbased or superbased calcium sulfonate; and / or

[0025] The antioxidant is dialkylphenol or dialkyldiphenylamine; and / or

[0026] The extreme pressure anti-wear agent is aminothioester or triphenyl thiophosphate; and / or

[0027] The antioxidant and anticorrosive agent is a primary alkyl alkaline zinc salt of bis-octyl thiophosphate; and / or

[0028] The rust inhibitor is dodecenylsuccinic acid or alkenylsuccinic acid monoester or benzotriazole; and / or

[0029] The anti-foaming agent is polymethylsiloxane.

[0030] Preferably, the regenerated base oil is a paraffin-based regenerated base oil with a viscosity grade of 100SN or 250SN.

[0031] Preferably, the anti-wear hydraulic oil composition contains 49.5 wt% to 99.0 wt% of component (A); and / or

[0032] The anti-wear hydraulic oil composition contains 0.01 wt% to 50.0 wt% of component (B); and / or

[0033] The anti-wear hydraulic oil composition contains 0.10wt% to 0.25wt% of component (C); and / or

[0034] The anti-wear hydraulic oil composition contains 0.10 wt% to 0.40 wt% of component (D); and / or

[0035] The anti-wear hydraulic oil composition contains 0.10 wt% to 0.40 wt% of component (E); and / or

[0036] The anti-wear hydraulic oil composition contains 0.10 wt% to 0.40 wt% of component (F); and / or

[0037] The anti-wear hydraulic oil composition contains 0.10 wt% to 0.30 wt% of component (G); and / or

[0038] The anti-wear hydraulic oil composition contains 0.05wt% to 0.20wt% of component (H); and / or

[0039] The anti-wear hydraulic oil composition contains 0.001 wt% to 0.02 wt% of component (I); and / or

[0040] The anti-wear hydraulic oil composition contains 0.001 wt% to 0.02 wt% of component (J).

[0041] Preferably, the anti-wear hydraulic oil composition is L-HM46# anti-wear hydraulic oil, which is composed of the following components in weight percentage: 99.0% of recycled base oil 250SN, 0.15% of high base value petroleum calcium sulfonate, 0.20% of 2,6-di-tert-butyl-p-cresol T501, 0.20% of aminothioester T323, 0.20% of dioctyl primary alkyl alkaline zinc salt of sulfur and phosphorus T203, 0.10% of dodecenylsuccinic acid T746, 0.14% of poly-α-olefin T806, 0.005% of amine and ethylene oxide condensate T1002, and 0.005% of polymethylsiloxane T901.

[0042] Preferably, the anti-wear hydraulic oil composition is L-HM46# anti-wear hydraulic oil, which is composed of the following components in weight percentage: 99.0% recycled base oil 250SN, 0.15% high base value petroleum calcium sulfonate, 0.20% 2,6-di-tert-butyl mixed phenol T502, 0.20% triphenyl thiophosphate T309, 0.20% dioctyl primary alkyl alkaline zinc salt of thiophosphate T203, 0.10% dodecenylsuccinic acid T746, 0.14% poly-α-olefin T806, 0.005% amine and ethylene oxide condensate T1002, and 0.005% polymethylsiloxane T901.

[0043] Preferably, the anti-wear hydraulic oil composition is L-HM32# anti-wear hydraulic oil, which is composed of the following components in weight percentage: 49.5% regenerated base oil 100SN, 49.5% regenerated base oil 250SN, 0.15% high base value petroleum calcium sulfonate, 0.20% 2,6-di-tert-butyl-p-cresol T501, 0.20% aminothioester T323, 0.20% sulfur phosphorus bis-octyl primary alkyl basic zinc salt T203, 0.10% dodecenyl succinic acid T746, 0.14% poly-α-olefin T806, 0.005% amine and ethylene oxide condensate T1002, 0.005% polymethylsiloxane T901; or

[0044] The anti-wear hydraulic oil composition is L-HM32# anti-wear hydraulic oil, which is composed of the following components in weight percentage: 49.5% of recycled base oil 100SN, 49.5% of recycled base oil 250SN, 0.15% of high base value petroleum calcium sulfonate, 0.20% of 2,6-di-tert-butyl mixed phenol T502, 0.20% of triphenyl thiophosphate T309, 0.20% of dioctyl primary alkyl alkaline zinc salt of thiophosphate T203, 0.10% of dodecenyl succinic acid T746, 0.14% of poly-α-olefin T806, 0.005% of amine and ethylene oxide condensate T1002, and 0.005% of polymethylsiloxane T901.

[0045] Preferably, the anti-wear hydraulic oil composition is L-HM68# anti-wear hydraulic oil, which is composed of the following components in percentage by weight: 49.5% regenerated base oil 250SN, 49.5% cycloalkyl oil N4010, 0.15% high base petroleum calcium sulfonate, 0.20% 2,6-di-tert-butyl-p-cresol T501, 0.20% aminothioester T323, 0.20% sulfur phosphorus bis-octyl primary alkyl basic zinc salt T203, 0.10% dodecenyl succinic acid T746, 0.14% poly-α-olefin T806, 0.005% amine and ethylene oxide condensate T1002, 0.005% polymethylsiloxane T901; or

[0046] The anti-wear hydraulic oil composition is L-HM68# anti-wear hydraulic oil, which is composed of the following components in percentage by weight: 49.5% of recycled base oil 250SN, 49.5% of cycloalkyl oil N4010, 0.15% of high-base petroleum calcium sulfonate, 0.20% of 2,6-di-tert-butyl mixed phenol T502, 0.20% of triphenyl thiophosphate T309, 0.20% of dioctyl primary alkyl alkaline zinc salt of thiophosphate T203, 0.10% of dodecenyl succinic acid T746, 0.14% of poly-α-olefin T806, 0.005% of amine and ethylene oxide condensate T1002, and 0.005% of polymethylsiloxane T901.

[0047] The present invention also provides a method for preparing the anti-wear hydraulic oil composition, comprising the following steps:

[0048] (1) adding the regenerated base oil (A) and the cycloalkyl base oil or the aromatic base oil (B) into a stirring blending kettle according to a certain proportion;

[0049] (2) Add antioxidant and anticorrosion agent (F), extreme pressure and antiwear agent (E), and antioxidant (D) into the blending kettle and stir for 30 minutes;

[0050] (3) Add rust inhibitor (G), pour point depressant (H), detergent (C), demulsifier (I) and antifoaming agent (J) into a blending kettle and stir at 50-60°C for 2 hours until the mixture is completely dissolved and becomes uniform and transparent.

[0051] The regenerated base oil is different from the lubricating base oil extracted from crude oil, and its ideal component composition, oxidation stability and other indicators are all reduced. The components described in the present invention are selected for compounding. Under the condition of ensuring that the specification index requirements of GB / T11118.1-2011 are met, the cost of its blending preparation can be reduced by 45% compared with the anti-wear hydraulic oil compound prepared by the lubricating base oil refined from crude oil on the market, which greatly improves the blending cost advantage. While regenerating waste oil, protecting the environment and saving energy, it also saves raw material costs for production enterprises and creates economic benefits. The anti-wear hydraulic oil of the present invention has stable performance, convenient preparation, excellent performance, and broad market promotion prospects. DETAILED DESCRIPTION

[0052] The following examples are provided for a better understanding of the present invention, but are not intended to limit the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified. The test materials used in the following examples are purchased from conventional biochemical reagent companies unless otherwise specified. The quantitative tests in the following examples are repeated three times, and the results are averaged. In the present invention, "wt%" means weight percentage.

[0053] The regenerated base oil used in the present invention is 100SN and 250SN base oil produced by Gansu Zhongkelong Energy Environment Co., Ltd. (already sold publicly and available to the public). Its production process is divided into two major processes: base oil distillation and NMP solvent refining. The base oil distillation process specifically includes pretreatment, primary vacuum flash evaporation, secondary vacuum flash evaporation, high-efficiency thin film distillation, and rectification. The NMP solvent extraction and refining process specifically includes extraction, deagent removal, stripping, and solvent recovery. The specific process steps are as follows:

[0054] (1) Waste lubricating oil collected by auto repair shops / 4S stores is transported to the factory and allowed to settle naturally, which can remove some impurities and moisture. Sodium hydroxide (caustic soda flakes) flocculant is added to settle and neutralize the organic acid in the oil.

[0055] (2) The waste lubricating oil that has been pretreated by flocculation is subjected to the first vacuum flash evaporation (80-160°C) to gasify and extract the water and a small amount of light oil in the waste lubricating oil; and then the light base oil vapor is separated by the second vacuum flash evaporation (160-200°C), and the light base oil vapor enters the distillation tower for further distillation.

[0056] (3) After two vacuum flash evaporations, the heavy base oil component is pumped into a vacuum high-efficiency thin film evaporator (200°C to 360°C) through a two-stage oil pump for high-efficiency distillation, and the gas-phase lubricating oil base oil enters a distillation tower for further distillation and separation.

[0057] (4) The distillation tower is provided with a tower top extraction section, a second-line reflux section, an extraction section, a third-line reflux section, and an extraction section. The gas phase first-line oil extracted from the tower top is 75SN lubricating oil base oil, the liquid phase second-line oil extracted from the second-line is 100SN lubricating oil base oil crude oil, and the liquid phase third-line oil extracted from the third-line is 250SN lubricating oil base oil crude oil;

[0058] (5) After distillation in the distillation tower, the crude 100SN and 250SN lubricating base oils are subjected to N-methylpyrrolidone (NMP) solvent extraction. After the extraction, the refined liquid contains some solvent, which is then removed from the solvent in the stripping tower. The refined liquid after stripping enters the stripping tower (110°C to 130°C) for stripping to obtain 100SN and 250SN base oils.

[0059] (6) After the extraction is completed, the NMP solvent extract is evaporated through the first and second effect towers (130-160° C.) and then condensed and refluxed to the solvent recovery tank for recycling.

[0060] The physical and chemical properties of the prepared 100SN base oil are shown in Table 1.

[0061] Table 1 Physical and chemical properties of 1100SN base oil

[0062]

[0063] The physical and chemical properties of the prepared 250SN base oil are shown in Table 2.

[0064] Table 2 Physical and chemical properties of 250SN base oil

[0065]

[0066] The anti-wear hydraulic oil composition produced by utilizing the regenerated base oil of the present invention is composed of the following components in percentage by weight:

[0067] (A) 39.0%-99% of recycled base oils of various viscosity grades,

[0068] (B) 0.01% to 60.0% of naphthenic base oil or aromatic base oil,

[0069] (C) 0.05%-0.30% detergent,

[0070] (D) 0.10%-0.50% antioxidant,

[0071] (E) 0.10%-0.50% extreme pressure anti-wear agent,

[0072] (F) 0.05%-0.50% antioxidant and antiseptic,

[0073] (G) 0.10%-0.30% rust inhibitor,

[0074] (H) 0.05%-0.30% pour point depressant,

[0075] (I) 0.001% to 0.03% of an anti-emulsifier,

[0076] (J) 0.001%-0.03% anti-foaming agent;

[0077] Wherein, the detergent (C) is a high-based or super-based sulfonate;

[0078] The antioxidant (D) is a dialkylphenol or a dialkyldiphenylamine;

[0079] The extreme pressure anti-wear agent (E) is a sulfur, phosphorus or nitrogen compound;

[0080] The antioxidant and anticorrosive agent (F) is a zinc dialkyl dithiophosphate (ZDDP) compound;

[0081] The rust inhibitor (G) is an organic sulfonic acid barium salt or an olefin succinic acid / ester;

[0082] The pour point depressant (H) is a poly-α-olefin;

[0083] The demulsifier (I) is a copolymer of acrylate and ether or a condensate of amine and ethylene oxide;

[0084] The antifoaming agent (J) is methyl silicone oil.

[0085] As a preferred embodiment, the regenerated base oil (A) component is a paraffin-based regenerated base oil with a viscosity grade of 75SN, 100SN, 150SN, 250SN or 350SN.

[0086] As a preferred embodiment, the detergent (C) component is an overbased or superbased calcium sulfonate.

[0087] As a preferred embodiment, the antioxidant (D) component is a dialkylphenol or a dialkyldiphenylamine.

[0088] As a preferred embodiment, the extreme pressure antiwear agent (E) component is aminothioester or triphenylthiophosphate.

[0089] As a preferred embodiment, the antioxidant and anticorrosive agent (F) component is a primary alkyl basic zinc salt of bis-octyl thiophosphate.

[0090] As a preferred embodiment, the rust inhibitor (G) component is dodecenylsuccinic acid or alkenylsuccinic acid monoester or benzotriazole.

[0091] As a preferred embodiment, the anti-foaming agent (J) component is polymethylsiloxane.

[0092] As a preferred embodiment, the anti-wear hydraulic oil composition contains 49.5 wt% to 99.0 wt% of component (A).

[0093] As a preferred embodiment, the anti-wear hydraulic oil composition contains 0.01 wt% to 50.0 wt% of component (B).

[0094] As a preferred embodiment, the anti-wear hydraulic oil composition contains 0.10 wt% to 0.25 wt% of component (C).

[0095] As a preferred embodiment, the anti-wear hydraulic oil composition contains 0.10 wt% to 0.40 wt% of component (D).

[0096] As a preferred embodiment, the anti-wear hydraulic oil composition contains 0.10 wt% to 0.40 wt% of component (E).

[0097] As a preferred embodiment, the anti-wear hydraulic oil composition contains 0.10 wt% to 0.40 wt% of component (F).

[0098] As a preferred embodiment, the anti-wear hydraulic oil composition contains 0.10 wt% to 0.30 wt% of component (G).

[0099] As a preferred embodiment, the anti-wear hydraulic oil composition contains 0.05wt% to 0.20wt% of component (H).

[0100] As a preferred embodiment, the anti-wear hydraulic oil composition contains 0.001 wt% to 0.02 wt% of component (I).

[0101] As a preferred embodiment, the anti-wear hydraulic oil composition contains 0.001 wt% to 0.02 wt% of component (J).

[0102] The preparation method of an anti-wear hydraulic oil composition produced by using regenerated base oil of the present invention is as follows:

[0103] (1) adding the regenerated base oil (A) and the cycloalkyl base oil or the aromatic base oil (B) into a stirring blending kettle according to a certain proportion;

[0104] (2) Add antioxidant and anticorrosion agent (F), extreme pressure and antiwear agent (E), and antioxidant (D) into the blending kettle and stir for 30 minutes;

[0105] (3) Add rust inhibitor (G), pour point depressant (H), detergent (C), demulsifier (I) and antifoaming agent (J) into a blending kettle and stir at 50-60°C for 2 hours until the mixture is completely dissolved and becomes uniform and transparent.

[0106] In order to evaluate whether the anti-wear hydraulic oil produced with recycled base oil meets the national standard GB / T11118.1-2011, the copper strip corrosion test method for petroleum products (GB / T5096), the anti-rust performance test method of mineral oil with inhibitor in the presence of water (GB / T11143-2008), the 7305-2003 petroleum and synthetic fluid water separation test method (GB / T7305-2003), the GB / T12579-2002 lubricating oil foam characteristics test method (GB / T12579-2002) and the hydraulic oil oxidation stability (rotating oxygen bomb method) test method (SH / T0193) were carried out.

[0107] The test results show that the anti-wear hydraulic oil composition prepared by the present invention meets the requirements of the anti-wear hydraulic oil with viscosity grades of 32, 46 and 68 in the specification index of GB / T11118.1-2011.

[0108] Optimization test of the anti-wear hydraulic oil of the present invention:

[0109] In order to prepare the recycled base oil into anti-wear hydraulic oil that meets the specifications, it is necessary to add various additives to the recycled base oil. When adding, in addition to considering the performance and advantages of the additives themselves, the oxidation stability, thermal stability and anti-wear performance of the additives should also be comprehensively examined. When the various additives are used in combination, not only the performance of each single agent is superimposed, but also there is a synergistic effect between the components, so experiments are needed to obtain a better compatibility. The test process is as follows:

[0110] 1. The additives used in anti-wear hydraulic oil are mainly various antioxidants (including antioxidants, antioxidants, anti-corrosion agents and rust inhibitors, etc.) and anti-wear agents to improve the oxidation stability and extreme pressure anti-wear index of the composition. In view of this, oxidation stability and extrusion wear resistance comparison tests were carried out on various antioxidants and anti-wear agents.

[0111] 1. Oxidation stability optimization test:

[0112] The basic formula of the anti-wear hydraulic oil is: 99 parts by weight of recycled base oil 250SN (A), 0.15 parts by weight of high-base petroleum calcium sulfonate (C), 0.14 parts by weight of poly-α-olefin T806 (H), 0.005 parts by weight of amine and ethylene oxide condensate T1002 (I), and 0.005 parts by weight of polymethylsiloxane T901 (J).

[0113] On this basis, extreme pressure anti-wear agent (E) and different antioxidant preparations were added to conduct tests, wherein the oxidation stability was determined by the rotating oxygen bomb method. The test results are shown in Table 3.

[0114] Table 3 Adding different antioxidants to the basic formula of anti-wear hydraulic oil In Table 3, T323 is aminothioester (E, extreme pressure anti-wear agent), T203 is dioctyl primary alkyl basic zinc salt of sulfur and phosphorus (F, antioxidant and anti-corrosion agent), T501 is 2,6-di-tert-butyl-p-cresol (D, antioxidant), T502 is 2,6-di-tert-butyl mixed phenol (D, antioxidant), T706 is benzotriazole (G, rust inhibitor), and T746 is dodecenylsuccinic acid (G, rust inhibitor). The analysis of Table 3 is as follows:

[0115] (1) Without adding antioxidants and extreme pressure anti-wear agents, the oxidation stability of the basic formula of anti-wear hydraulic oil is 35 minutes.

[0116] (2) No extreme pressure anti-wear agent (E) was added, and only 0.20 wt% of the antioxidant and anti-corrosion agent (F) dioctyl primary alkyl basic zinc salt of thiophosphorus (T203) was added. The oxidation stability index of the anti-wear hydraulic oil was 109 min.

[0117] (3) Without adding extreme pressure anti-wear agent (E), only adding 0.20wt% antioxidant (D) 2,6-di-tert-butyl-p-cresol (T501), the oxidation stability index of the anti-wear hydraulic oil is 134min. It can be seen that when the amount of antioxidant added is the same, the performance of T501 is better than that of T203.

[0118] (4) No extreme pressure anti-wear agent (E) was added, and only 0.20 wt% of antioxidant (D) 2,6-di-tert-butyl mixed phenol (T502) was added. The oxidation stability index of the anti-wear hydraulic oil was 121 min.

[0119] (5) When no extreme pressure anti-wear agent (E) was added and only 0.20 wt% of antioxidant (D) 2,6-di-tert-butyl-p-cresol (T501) and 0.20 wt% of antioxidant and anti-corrosion agent (F) dioctyl primary alkyl basic zinc salt of thiophosphorus (T203) were added, the oxidation stability index was 285 min.

[0120] (6) When no extreme pressure anti-wear agent (E) was added, and only 0.20wt% of antioxidant (D) 2,6-di-tert-butyl mixed phenol (T502) and 0.20wt% of antioxidant and anti-corrosion agent (F) thiophosphorus bis-octyl primary alkyl basic zinc salt (T203) were added, the oxidation stability index was 273min. It can be seen that when the amount of antioxidant added is the same, the performance of T501 is better than that of T502.

[0121] (7) When 0.20 wt% of the extreme pressure anti-wear agent (E) aminothioester (T323) is added, and then 0.20 wt% of the antioxidant (D) 2,6-di-tert-butyl-p-cresol (T501) and 0.20 wt% of the rust inhibitor (G) benzotriazole (T706) are added, the oxidation stability index can be greatly improved to 625 min. However, due to its poor oil solubility, it will cause the oil to fog, so it is excluded.

[0122] (8) When 0.20 wt% of the extreme pressure anti-wear agent (E) aminothioester (T323) is added, and then 0.20 wt% of the antioxidant (D) 2,6-di-tert-butyl mixed phenol (T502) and 0.20 wt% of the rust inhibitor (G) benzotriazole (T706) are added, the oxidation stability index can be greatly improved to 547 min. However, due to its poor oil solubility, it will cause the oil to mist, so it is excluded.

[0123] (9) When no extreme pressure anti-wear agent (E) was added and only 0.20 wt% of antioxidant (D) 2,6-di-tert-butyl-p-cresol (T501), 0.20 wt% of antioxidant and anti-corrosion agent (F) bis(octyl) primary alkyl basic zinc salt of thiophosphorus (T203) and 0.10 wt% of rust inhibitor (G) dodecenylsuccinic acid (T746) were added, the oxidation stability index was 318 min.

[0124] (10) When no extreme pressure anti-wear agent (E) was added and only 0.20 wt% of antioxidant (D) 2,6-di-tert-butyl mixed phenol (T502), 0.20 wt% of antioxidant and anti-corrosion agent (F) bis(octyl) primary alkyl basic zinc salt of thiophosphorus (T203) and 0.10 wt% of rust inhibitor (G) dodecenylsuccinic acid (T746) were added, the oxidation stability index was 281 min.

[0125] (11) When 0.20 wt% of the extreme pressure anti-wear agent (E) aminothioester (T323) is added, and then 0.20 wt% of the antioxidant (D) 2,6-di-tert-butyl-p-cresol (T501), 0.20 wt% of the antioxidant and anti-corrosion agent (F) dioctyl primary alkyl basic zinc salt of thiophosphorus (T203) and 0.10 wt% of the rust inhibitor (G) dodecenylsuccinic acid (T746) are added, the oxidation stability index is 395 min.

[0126] (12) When 0.20 wt% of the extreme pressure anti-wear agent (E) aminothioester (T323) is added, and then 0.20 wt% of the antioxidant (D) 2,6-di-tert-butyl mixed phenol (T502), 0.20 wt% of the primary alkyl basic zinc salt of disoctyl thiophosphate (T203) and 0.10 wt% of the rust inhibitor (G) dodecenylsuccinic acid (T746) are added, the oxidation stability index is 366 min.

[0127] From the comparison of (2), (3) and (5) above, and the comparison of (2), (4) and (6) above, it can be seen that when the antioxidant (D) is used in combination with the antioxidant and anticorrosive agent (F), the oxidation stability is better.

[0128] From the comparison between (3) and (4) and (5) and (6), it can be seen that the oxidation stability of the anti-wear hydraulic oil prepared using 2,6-di-tert-butyl-p-cresol (T501) is better than that of the anti-wear hydraulic oil prepared using 2,6-di-tert-butyl mixed phenol (T502). It should also be noted that T502 has a more obvious odor than T501, but its price is 25% lower than that of T501, which can be adjusted according to production conditions.

[0129] From the comparison between (5) and (9), and the comparison between (6) and (10), it can be seen that the addition of rust inhibitor (G) dodecenylsuccinic acid (T746) can further improve the oxidation stability of the anti-wear hydraulic oil. However, the rust inhibitor (G) dodecenylsuccinic acid (T746) has a certain acid value, so the dosage should not be too high when used.

[0130] From the comparison between (9) and (11) above, it can be seen that the addition of the extreme pressure anti-wear agent (E) aminothioester (T323) can further improve the oxidation stability of the anti-wear hydraulic oil.

[0131] In summary, the antioxidant preparation preferably comprises antioxidant (D) 2,6-di-tert-butyl-p-cresol (T501), antioxidant and anticorrosion agent (F) bis(octyl) primary alkyl basic zinc salt of thiophosphorus (T203) and rust inhibitor (G) dodecenylsuccinic acid (T746), the weight ratio of the three being 2:2:1, and aminothioester (T323) being selected as the extreme pressure antiwear agent (E). The oxidation stability performance index can meet the use requirements of antiwear hydraulic oil, and at the same time, its antiwear performance complies with the SH / T0189-2017 standard (Determination of antiwear performance of lubricating oil (four-ball machine method)) (see Table 4).

[0132] 2. Extreme pressure and anti-wear optimization experiment

[0133] In order to ensure that the anti-wear hydraulic oil produced using recycled base oil has good anti-wear properties, extreme pressure anti-wear agents triphenyl thiophosphate (T309) and aminothioester (T323) were selected for testing.

[0134] As extreme pressure anti-wear agents, T309 and T323 not only have excellent anti-wear properties, but also have excellent antioxidant properties. Compounding experiments have found that T323 / T309 and T501 have good compatibility, and both have improved the oxidation stability of oils while having good anti-wear properties. And the performance of T309 and T323 is equivalent. When the specific dosage is T323 (or T309): T501 is 1:1, the antioxidant properties are good, and the anti-wear properties also meet the SH / T0189-2017 standard. However, aminothioester (T323) is cheaper than triphenyl thiophosphate (T309), so aminothioester (T323) is preferred as an extreme pressure anti-wear agent.

[0135] 2. In the present invention, the detergent (C) selected is high base value petroleum calcium sulfonate (T103). T103 can not only improve the cleaning performance and acid neutralization performance of anti-wear hydraulic oil, but also provide certain anti-rust performance. At the same time, T103 has good compatibility with other additives.

[0136] 3. In the present invention, poly-α-olefin, amine and ethylene oxide condensate, and polymethylsiloxane are selected as pour point depressant, anti-emulsifier, and anti-foaming agent, respectively, also based on the good sensitivity of the regenerated base oil and additives, and no turbidity or fogging occurs.

[0137] Example 1

[0138] The L-HM46# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is composed of the following components in percentage by weight:

[0139] 99.0% recycled base oil 250SN (A) produced by Gansu Zhongkelong Energy Environment Co., Ltd., 0.15% high base value petroleum calcium sulfonate (C), 0.20% 2,6-di-tert-butyl-p-cresol T501 (D), 0.20% aminothioester T323 (E), 0.20% dioctyl primary alkyl basic zinc salt of thiophosphorus T203 (F), 0.10% dodecenylsuccinic acid T746 (G), 0.14% poly-α-olefin T806 (H), 0.005% amine and ethylene oxide condensate T1002 (I), 0.005% polymethylsiloxane T901 (J).

[0140] The preparation method of the L-HM46# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is as follows:

[0141] (1) Add the regenerated base oil (A), dioctyl primary alkyl basic zinc salt of thiophosphorus T203 (F), aminothioester T323 (E), and 2,6-di-tert-butyl-p-cresol T501 (D) into a blending kettle and stir for 30 minutes;

[0142] (2) Add dodecenylsuccinic acid T746 (G), poly-α-olefin T806 (H), high base value petroleum calcium sulfonate (C), amine and ethylene oxide condensate T1002 (I), and polymethylsiloxane T901 (J) into a mixing kettle and stir at 55° C. for 2 h until the mixture is completely dissolved and becomes uniform and transparent.

[0143] The physical and chemical indicators of the L-HM46# anti-wear hydraulic oil composition produced in this example are shown in Table 4.

[0144] Table 4

[0145]

[0146] Example 2

[0147] The L-HM46# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is composed of the following components in percentage by weight:

[0148] 99.0% recycled base oil 250SN (A), 0.15% high base value petroleum calcium sulfonate (C), 0.20% 2,6-di-tert-butyl mixed phenol T502 (D), 0.20% triphenyl thiophosphate T309 (E), 0.20% dioctyl primary alkyl basic zinc salt of thiophosphate T203 (F), 0.10% dodecenylsuccinic acid T746 (G), 0.14% poly-α-olefin T806 (H), 0.005% amine and ethylene oxide condensate T1002 (I), 0.005% polymethylsiloxane T901 (J).

[0149] The preparation method of the L-HM46# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is as follows:

[0150] (1) Add the regenerated base oil (A), dioctyl primary alkyl alkaline zinc salt of phosphorus thioate T203 (F), triphenyl thiophosphate T309 (E), and 2,6-di-tert-butyl mixed phenol T502 (D) into a blending kettle and stir for 30 minutes;

[0151] (2) Add dodecenylsuccinic acid T746 (G), poly-α-olefin T806 (H), high base value petroleum calcium sulfonate (C), amine and ethylene oxide condensate T1002 (I), and polymethylsiloxane T901 (J) into a mixing kettle and stir at 60° C. for 2 h until the mixture is completely dissolved and becomes uniform and transparent.

[0152] The physical and chemical indicators of the L-HM46# anti-wear hydraulic oil composition produced in this example are shown in Table 5.

[0153] Table 5

[0154]

[0155] Example 3

[0156] The L-HM32# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is composed of the following components in percentage by weight:

[0157] 49.5% recycled base oil 100SN (A), 49.5% recycled base oil 250SN (B), 0.15% high base value petroleum calcium sulfonate (C), 0.20% 2,6-di-tert-butyl-p-cresol T501 (D), 0.20% aminothioester T323 (E), 0.20% dioctyl primary alkyl basic zinc salt of thiophosphorus T203 (F), 0.10% dodecenylsuccinic acid T746 (G), 0.14% poly-α-olefin T806 (H), 0.005% amine and ethylene oxide condensate T1002 (I), 0.005% polymethylsiloxane T901 (J).

[0158] The preparation method of the L-HM32# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is as follows:

[0159] (1) Add the regenerated base oil (A), dioctyl primary alkyl basic zinc salt of thiophosphorus T203 (F), aminothioester T323 (E), and 2,6-di-tert-butyl-p-cresol T501 (D) into a blending kettle and stir for 30 minutes;

[0160] (2) Add dodecenylsuccinic acid T746 (G), poly-α-olefin T806 (H), high base value petroleum calcium sulfonate (C), amine and ethylene oxide condensate T1002 (I), and polymethylsiloxane T901 (J) into a mixing kettle and stir at 55° C. for 2 h until the mixture is completely dissolved and becomes uniform and transparent.

[0161] The physical and chemical indicators of the L-HM32# anti-wear hydraulic oil composition produced in this example are shown in Table 6.

[0162] Table 6

[0163]

[0164]

[0165] Example 4

[0166] The L-HM32# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is composed of the following components in percentage by weight:

[0167] 49.5% recycled base oil 100SN (A), 49.5% recycled base oil 250SN (B), 0.15% high base value petroleum calcium sulfonate (C), 0.20% 2,6-di-tert-butyl mixed phenol T502 (D), 0.20% triphenyl thiophosphate T309 (E), 0.20% dioctyl primary alkyl basic zinc salt of thiophosphate T203 (F), 0.10% dodecenylsuccinic acid T746 (G), 0.14% poly-α-olefin T806 (H), 0.005% amine and ethylene oxide condensate T1002 (I), 0.005% polymethylsiloxane T901 (J).

[0168] The preparation method of the L-HM32# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is as follows:

[0169] (1) Add regenerated base oil (A), regenerated base oil (B), dioctyl primary alkyl basic zinc salt of thiophosphorus T203 (F), triphenyl thiophosphate T309 (E), and 2,6-di-tert-butyl mixed phenol T502 (D) into a blending kettle and stir for 30 minutes;

[0170] (2) Add dodecenylsuccinic acid T746 (G), poly-α-olefin T806 (H), high base value petroleum calcium sulfonate (C), amine and ethylene oxide condensate T1002 (I), and polymethylsiloxane T901 (J) into a mixing kettle and stir at 60° C. for 2 h until the mixture is completely dissolved and becomes uniform and transparent.

[0171] The physical and chemical indicators of the L-HM32# anti-wear hydraulic oil composition produced in this example are shown in Table 7.

[0172] Table 7

[0173]

[0174]

[0175] Example 5

[0176] The L-HM68# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is composed of the following components in percentage by weight:

[0177] 49.5% regenerated base oil 250SN (A), 49.5% cycloalkane oil N4010 (B), 0.15% high base number petroleum calcium sulfonate (C), 0.20% 2,6-di-tert-butyl-p-cresol T501 (D), 0.20% aminothioester T323 (E), 0.20% dioctyl primary alkyl basic zinc salt of thiophosphorus T203 (F), 0.10% dodecenylsuccinic acid T746 (G), 0.14% poly-α-olefin T806 (H), 0.005% amine and ethylene oxide condensate T1002 (I), 0.005% polymethylsiloxane T901 (J).

[0178] The preparation method of the L-HM32# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is as follows:

[0179] (1) Add regenerated base oil (A), regenerated base oil (B), dioctyl primary alkyl basic zinc salt of thiophosphorus T203 (F), aminothioester T323 (E), and 2,6-di-tert-butyl-p-cresol T501 (D) into a blending kettle and stir for 30 minutes;

[0180] (2) Add dodecenylsuccinic acid T746 (G), poly-α-olefin T806 (H), high base value petroleum calcium sulfonate (C), amine and ethylene oxide condensate T1002 (I), and polymethylsiloxane T901 (J) into a mixing kettle and stir at 60° C. for 2 h until the mixture is completely dissolved and becomes uniform and transparent.

[0181] The physical and chemical indicators of the L-HM68# anti-wear hydraulic oil composition produced in this example are shown in Table 8.

[0182] Table 8

[0183]

[0184]

[0185] Example 6

[0186] The L-HM68# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is composed of the following components in percentage by weight:

[0187] 49.5% recycled base oil 250SN (A), 49.5% cycloalkane oil N4010 (B), 0.15% high base value petroleum calcium sulfonate (C), 0.20% 2,6-di-tert-butyl mixed phenol T502 (D), 0.20% triphenyl thiophosphate T309 (E), 0.20% dioctyl primary alkyl basic zinc salt of thiophosphate T203 (F), 0.10% dodecenylsuccinic acid T746 (G), 0.14% poly-α-olefin T806 (H), 0.005% amine and ethylene oxide condensate T1002 (I), 0.005% polymethylsiloxane T901 (J).

[0188] The preparation method of the L-HM32# anti-wear hydraulic oil composition produced by using the regenerated base oil of the present invention is as follows:

[0189] (1) Add regenerated base oil (A), regenerated base oil (B), dioctyl primary alkyl basic zinc salt of thiophosphorus T203 (F), triphenyl thiophosphate T309 (E), and 2,6-di-tert-butyl mixed phenol T502 (D) into a blending kettle and stir for 30 minutes;

[0190] (2) Add dodecenylsuccinic acid T746 (G), poly-α-olefin T806 (H), high base value petroleum calcium sulfonate (C), amine and ethylene oxide condensate T1002 (I), and polymethylsiloxane T901 (J) into a mixing kettle and stir at 60° C. for 2 h until the mixture is completely dissolved and becomes uniform and transparent.

[0191] The physical and chemical indicators of the L-HM68# anti-wear hydraulic oil composition produced in this example are shown in Table 9.

[0192] Table 9

[0193]

[0194]

[0195] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-wear hydraulic oil composition produced using recycled base oil, characterized in that: The anti-wear hydraulic oil composition is L-HM46# anti-wear hydraulic oil, which is composed of the following components in weight percentage: 99.0% of recycled base oil 250SN, 0.15% of high base value petroleum calcium sulfonate, 0.20% of 2,6-di-tert-butyl-p-cresol T501, 0.20% of aminothioester T323, 0.20% of dioctyl primary alkyl basic zinc salt of sulfur and phosphorus T203, 0.10% of dodecenylsuccinic acid T746, 0.14% of poly-α-olefin T806, 0.005% of amine and ethylene oxide condensate T1002, and 0.005% of polymethylsiloxane T901.

2. An anti-wear hydraulic oil composition produced using recycled base oil, characterized in that: The anti-wear hydraulic oil composition is L-HM46# anti-wear hydraulic oil, which is composed of the following components in weight percentage: 99.0% recycled base oil 250SN, 0.15% high base value petroleum calcium sulfonate, 0.20% 2,6-di-tert-butyl mixed phenol T502, 0.20% triphenyl thiophosphate T309, 0.20% dioctyl primary alkyl alkaline zinc salt of thiophosphate T203, 0.10% dodecenyl succinic acid T746, 0.14% poly-α-olefin T806, 0.005% amine and ethylene oxide condensate T1002, and 0.005% polymethylsiloxane T901.

3. An anti-wear hydraulic oil composition produced using recycled base oil, characterized in that: The anti-wear hydraulic oil composition is L-HM32# anti-wear hydraulic oil, which is composed of the following components in weight percentage: 49.5% regenerated base oil 100SN, 49.5% regenerated base oil 250SN, 0.15% high base value petroleum calcium sulfonate, 0.20% 2,6-di-tert-butyl-p-cresol T501, 0.20% aminothioester T323, 0.20% thiophosphorus bis-octyl primary alkyl basic zinc salt T203, 0.10% dodecenylsuccinic acid T746, 0.14% poly-α-olefin T806, 0.005% amine and ethylene oxide condensate T1002, and 0.005% polymethylsiloxane T901.

4. An anti-wear hydraulic oil composition produced using recycled base oil, characterized in that: The anti-wear hydraulic oil composition is L-HM32# anti-wear hydraulic oil, which is composed of the following components in percentage by weight: 49.5% of regenerated base oil 100SN, 49.5% of regenerated base oil 250SN, 0.15% of high base value petroleum calcium sulfonate, 0.20% of 2,6-di-tert-butyl mixed phenol T502, 0.20% of triphenyl thiophosphate T309, 0.20% of dioctyl primary alkyl alkaline zinc salt of thiophosphate T203, 0.10% of dodecenyl succinic acid T746, 0.14% of poly-α-olefin T806, 0.005% of amine and ethylene oxide condensate T1002, and 0.005% of polymethylsiloxane T901.

5. The method for preparing the anti-wear hydraulic oil composition according to claim 1, characterized in that: Here are the steps: (1) Add the regenerated base oil, dioctyl primary alkyl basic zinc salt of thiophosphorus T203, aminothioester T323, and 2,6-di-tert-butyl-p-cresol T501 into the blending kettle and stir for 30 minutes; (2) Add dodecenylsuccinic acid T746, poly-α-olefin T806, high base value petroleum calcium sulfonate, amine and ethylene oxide condensate T1002, and polymethylsiloxane T901 into a mixing kettle and stir at 55°C for 2 hours until the mixture is completely dissolved and becomes uniform and transparent.

6. The method for preparing the anti-wear hydraulic oil composition according to claim 2, characterized in that: Here are the steps: (1) Add the regenerated base oil, dioctyl primary alkyl alkaline zinc salt of thiophosphorus T203, triphenyl thiophosphate T309, and 2,6-di-tert-butyl mixed phenol T502 into a blending kettle and stir for 30 minutes; (2) Add dodecenylsuccinic acid T746, poly-α-olefin T806, high base value petroleum calcium sulfonate, amine and ethylene oxide condensate T1002, and polymethylsiloxane T901 into a mixing kettle and stir at 60°C for 2 hours until the mixture is completely dissolved and becomes uniform and transparent.

7. The method for preparing the anti-wear hydraulic oil composition according to claim 4, characterized in that: Here are the steps: (1) Add regenerated base oil 100SN, regenerated base oil 250SN, dioctyl primary alkyl alkaline zinc salt of thiophosphorus T203, triphenyl thiophosphate T309, and 2,6-di-tert-butyl mixed phenol T502 into a blending kettle and stir for 30 minutes; (2) Add dodecenylsuccinic acid T746, poly-α-olefin T806, high base value petroleum calcium sulfonate, amine and ethylene oxide condensate T1002, and polymethylsiloxane T901 into a mixing kettle and stir at 60°C for 2 hours until the mixture is completely dissolved and becomes uniform and transparent.

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