Lubricating oil additive and lubricating oil

Abstract

The present invention provides a lubricating oil additive and lubricating oil. The lubricating oil additive of the present invention comprises, by mass percentage, 5%-40% of ionic liquid; 10%-60% of antioxidant; 1%-30% of rust inhibitor; 1%-30% of metal passivator; 1%-30% of dispersant; 0.5%-10% of demulsifier; 0.5%-10% of antifoaming agent; 5%-10% of diluent oil; wherein the ionic liquid comprises substituted or unsubstituted pyridinium cation and carboxylic acid anion. The lubricating oil additive of the present invention has relatively excellent anti-oxidation, anti-rust, anti-corrosion and environmental friendliness.

Description

Technical Field

[0001] The present invention relates to the technical field of lubricating oils, and in particular to a lubricating oil additive and lubricating oil. Background Art

[0002] Piston compressors have the advantages of simple structure, convenient maintenance, insulation efficiency greater than 80%, high operating efficiency, low power consumption, convenient flow adjustment and little impact on exhaust pressure. Therefore, they account for the largest proportion of industrial compression equipment and have the widest application range. The demand is particularly strong in industries such as petrochemicals, metallurgy, mining and machinery manufacturing. With the continuous improvement of the level of industrialization and the innovation of equipment development technology, piston compressors are developing in the direction of multi-level and precision, and the pressure and temperature of the equipment are further increased, and the performance requirements for the corresponding oil products are also more stringent, especially the requirements for the anti-oxidation, anti-rust and anti-corrosion performance of the corresponding oil products are more stringent.

[0003] Therefore, there is an urgent need to provide a lubricating oil additive that has relatively excellent anti-oxidation, anti-rust and anti-corrosion properties. Summary of the invention

[0004] The invention provides a lubricating oil additive, which can have relatively excellent anti-oxidation, anti-rust and anti-corrosion properties.

[0005] The present invention provides a lubricating oil, which comprises the lubricating oil additive and thus has relatively excellent anti-oxidation, anti-rust and anti-corrosion properties.

[0006] The present invention provides a lubricating oil additive, which comprises, by mass percentage:

[0007]

[0008]

[0009] The ionic liquid includes substituted or unsubstituted pyridinium cations and carboxylate anions.

[0010] The lubricating oil additive as described above, wherein the mass ratio of the antioxidant to the ionic liquid is 1:(1-3).

[0011] The lubricating oil additive as described above, wherein the ionic liquid comprises the following structure:

[0012]

[0013] Wherein, n is a positive integer selected from 4-7.

[0014] The lubricating oil additive as described above, wherein the antioxidant is selected from at least one of dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, styryloctyldiphenylamine, α-methylstyryldiphenylamine and N,N'-sec-butyl-p-phenylenediamine.

[0015] The lubricating oil additive as described above, wherein the rust inhibitor is selected from at least one of isononylphenoxyacetic acid, sorbitan monooleate, alkenylsuccinic acid and barium dinonylnaphthalenesulfonate.

[0016] The lubricating oil additive as described above, wherein the metal deactivator is selected from at least one of alkylthiadiazole, methylbenzotriazole and N,N'-disalicylidenepropylenediamine.

[0017] The lubricating oil additive as described above, wherein the dispersant is selected from at least one of polyisobutylene succinate, chloro-free succinimide and isobutylene succinimide.

[0018] The lubricating oil additive as described above, wherein the demulsifier is selected from at least one of oil-soluble polyethers, condensates of amines and ethylene oxide, and condensates of fatty alcohols and ethylene oxide.

[0019] The lubricating oil additive as described above, wherein the antifoaming agent is selected from at least one of a composite antifoaming agent, polymethacrylate, and polyacrylate; and / or,

[0020] The diluent oil is an inert neutral oil.

[0021] The present invention also provides a lubricating oil, comprising the lubricating oil additive as described above.

[0022] The present invention provides a lubricating oil additive, which includes a specific content of ionic liquid, an antioxidant, a rust inhibitor, a metal passivator, a dispersant, a demulsifier, an antifoaming agent and a diluent oil, wherein the ionic liquid includes a substituted or unsubstituted pyridinium cation and a carboxylic acid anion. Since the ionic liquid constituting the lubricating oil additive includes a substituted or unsubstituted pyridinium cation and a carboxylic acid anion, the lubricating oil additive has relatively excellent antioxidant, rust-proof and corrosion-resistant properties; and the ionic liquid also has the advantage of excellent solubility, and can be relatively well matched with other components, further improving the antioxidant, rust-proof and corrosion-resistant properties of the lubricating oil additive. It is worth mentioning that the ionic liquid does not contain sulfur and phosphorus elements. The use of the ionic liquid can reduce the content of sulfur and phosphorus elements in the lubricating oil additive as much as possible, so the environmental performance of the lubricating oil additive can be improved.

[0023] The lubricating oil of the present invention, because it includes the above-mentioned lubricating oil additive, not only has relatively excellent anti-oxidation, anti-rust and anti-corrosion properties, but also has good environmental protection and has relatively broad application prospects. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The first aspect of the present invention provides a lubricating oil additive, comprising, by mass percentage:

[0026]

[0027] The ionic liquid includes substituted or unsubstituted pyridinium cations and carboxylate anions.

[0028] In the present invention, the pyridinium cation may or may not contain a substituent. When the pyridinium cation contains a substituent, the substituent may replace a hydrogen atom at any position of the pyridinium cation. The present invention does not limit the substituent, and the substituent may be selected from any substituent commonly used in the art, for example, the substituent may be an alkyl group or a halide group.

[0029] The present invention does not limit the specific source of the ionic liquid. The ionic liquid can be prepared by a preparation method commonly used in the art, or it can be purchased commercially.

[0030] The antioxidant, rust inhibitor, metal passivator, dispersant, demulsifier, antifoaming agent and diluent oil of the present invention are not particularly limited and can be selected from the antioxidants, rust inhibitors, metal passivators, dispersants, demulsifiers, antifoaming agents and diluent oils commonly used in the art.

[0031] In the present invention, the ionic liquid includes substituted or unsubstituted pyridinium cations and carboxylic acid anions. The use of the ionic liquid to prepare a lubricating oil additive can improve the anti-oxidation and anti-rust properties of the lubricating oil additive, and can passivate metal activity and improve the anti-corrosion performance of the lubricating oil additive; the ionic liquid also has the advantage of excellent solubility, is a good solvent, and can be relatively well compatible with other components, further improving the anti-oxidation, anti-rust and anti-corrosion properties of the lubricating oil additive.

[0032] Moreover, in the present invention, the ionic liquid does not contain sulfur and phosphorus elements, and is non-volatile and odorless. The use of the ionic liquid can reduce the content of sulfur and phosphorus elements in the lubricating oil additive as much as possible, so that the lubricating oil additive not only has excellent antioxidant, anti-rust and anti-corrosion properties, but also has certain environmental protection properties.

[0033] Furthermore, when the lubricating oil additive comprises, by mass percentage:

[0034] The lubricant additive has more excellent anti-oxidation, anti-rust and anti-corrosion properties.

[0035] In some embodiments of the present invention, in order to further improve the anti-oxidation, anti-rust and anti-corrosion properties of the lubricating oil additive, the mass ratio of the antioxidant to the ionic liquid is 1:(1-3).

[0036] In the present invention, the raw materials of ionic liquid, antioxidant, rust inhibitor, metal passivator, dispersant, demulsifier, antifoaming agent and diluent oil can be further selected to further improve the compatibility of each raw material and improve the anti-oxidation, anti-corrosion, anti-rust and environmental protection performance of the lubricating oil additive.

[0037] In some embodiments of the invention, the ionic liquid comprises the following structure:

[0038]

[0039] Wherein, n is a positive integer selected from 4-7.

[0040] In some embodiments of the present invention, the antioxidant is selected from at least one of dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, styryloctyldiphenylamine, α-methylstyryldiphenylamine and N,N′-sec-butyl-p-phenylenediamine.

[0041] In some embodiments of the present invention, the rust inhibitor is selected from at least one of isononylphenoxyacetic acid, sorbitan monooleate, alkenylsuccinic acid and barium dinonylnaphthalenesulfonate.

[0042] In some embodiments of the present invention, the metal deactivator is selected from at least one of alkylthiadiazole, methylbenzotriazole and N,N'-disalicylidenepropylenediamine.

[0043] In some embodiments of the present invention, the dispersant is selected from at least one of polyisobutylene succinate, chloro-free succinimide and isobutylene succinimide.

[0044] In some embodiments of the present invention, the demulsifier is selected from at least one of oil-soluble polyethers, condensates of amines and ethylene oxide, and condensates of fatty alcohols and ethylene oxide.

[0045] The present invention does not particularly limit the oil-soluble polyether, and the oil-soluble polyether commonly used in the art can be selected.

[0046] In the present invention, the condensate of amine and ethylene oxide refers to a compound formed by a condensation reaction between an amino group in an amino compound and an epoxy group in ethylene oxide. The condensate of fatty alcohol and ethylene oxide refers to a compound formed by a condensation reaction between a hydroxyl group in a fatty alcohol and an epoxy group in ethylene oxide. The present invention does not limit the amount of the compound participating in the condensation reaction, nor does it specifically limit the specific conditions of the condensation reaction, as long as the above-mentioned condensation reaction can occur.

[0047] In the present invention, each condensate can also be obtained by commercial purchase.

[0048] In some embodiments of the present invention, the antifoaming agent is selected from at least one of a composite antifoaming agent, polymethacrylate, and polyacrylate.

[0049] The present invention does not particularly limit the composite antifoaming agent, and the composite antifoaming agent commonly used in the art can be selected.

[0050] In some embodiments of the present invention, the diluent oil is an inert neutral oil. The present invention does not specifically limit the inert neutral oil, and the inert neutral oil can be selected from the inert neutral oil commonly used in the art, for example, the inert neutral oil can be HVI 150.

[0051] The present invention does not impose any particular limitation on the molecular weight of the above polymer.

[0052] The lubricating oil additive in some embodiments of the present invention can be obtained by uniformly mixing the raw materials according to the above composition. The present invention does not specifically limit the order of adding the raw materials, the stirring rate, and the mixing temperature.

[0053] The lubricating oil additive of the present invention not only has relatively excellent anti-oxidation, anti-rust, anti-corrosion and environmental friendliness, but also has simple preparation process, is easy to operate and has a wide range of applications.

[0054] A second aspect of the present invention provides a lubricating oil comprising the above-mentioned lubricating oil additive.

[0055] In the present invention, a certain amount of lubricating oil additive is mixed with a base oil commonly used in the art to obtain lubricating oil. Since the lubricating oil includes the above lubricating oil additive, the lubricating oil has relatively excellent anti-oxidation, anti-rust, anti-corrosion and environmental friendliness, and can be used as a piston compressor lubricating oil.

[0056] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0057] The structural formula of the ionic liquid in each embodiment and comparative example is

[0058]

[0059] Wherein, n is a positive integer selected from 4 to 7, and the ionic liquid is purchased from Xuzhou Institute of Technology;

[0060] The inert neutral oil in each embodiment and comparative example is HVI 150;

[0061] The oil-soluble polyether in each embodiment and comparative example is BASF L101;

[0062] The polyisobutylene succinate in each example and comparative example was purchased from Lubrizol Corporation;

[0063] The polymethacrylates in the examples and comparative examples were purchased from Evonik;

[0064] The condensation products of amine and ethylene oxide in each embodiment and comparative example were purchased from Danyang Tianyu;

[0065] The polyacrylates in the examples and comparative examples were purchased from Vanderbilt Company;

[0066] The 1# composite antifoaming agent in each embodiment and comparative example was purchased from Jinzhou Runda;

[0067] The fatty alcohol and ethylene oxide condensates in the examples and comparative examples were purchased from Lushun Chemical Factory;

[0068] The 2# composite antifoaming agent in each embodiment and comparative example was purchased from Jinzhou Runda;

[0069] The Group II base oil in each embodiment and comparative example is Formosa Plastics HVIH10.

[0070] Example 1

[0071] The composition of the lubricating oil additive of this embodiment is shown in Table 1:

[0072] Table 1

[0073] name Mass percentage / % Ionic liquid (n=6) 30 Dioctyldiphenylamine 39 Isononylphenoxyacetic acid 5 Alkyl thiadiazole 5 Polyisobutylene Succinate 10 Oil soluble polyether 3 Polymethacrylate 3 Inert neutral oil 5

[0074] Example 2

[0075] The composition of the lubricating oil additive of this embodiment is shown in Table 2:

[0076] Table 2

[0077] name Mass percentage / % Ionic liquid (n=4) 20 Octylbutyldiphenylamine 50 Succinic acid 5 Tolyltriazole 5 No chlorosuccinimide 5 Amine and ethylene oxide condensation product 2 Polyacrylate 2 Inert neutral oil 11

[0078] Example 3

[0079] The composition of the lubricating oil additive of this embodiment is shown in Table 3:

[0080] Table 3

[0081] name Mass percentage / % Ionic liquid (n=7) 25 α-Methylphenylenediphenylamine 25 Sorbitan monooleate 20 N,N'-Di-salicylidenepropylenediamine 5 Polyisobutylene Succinate 5 Amine and ethylene oxide condensation product 5 1# Composite antifoaming agent 5 Inert neutral oil 10

[0082] Example 4

[0083] The composition of the lubricating oil additive of this embodiment is shown in Table 4:

[0084] Table 4

[0085] name Mass percentage / % Ionic liquid (n=6) 30 N,N'-Sec-butyl-p-phenylenediamine 40 Barium dinonylnaphthalenesulfonate 5 Tolyltriazole 10 Isobutylene succinimide 10 Condensation product of fatty alcohol and ethylene oxide 1 2# Composite antifoaming agent 1 Inert neutral oil 3

[0086] Example 5

[0087] The composition of the lubricating oil additive of this embodiment is shown in Table 5:

[0088] Table 5

[0089]

[0090]

[0091] Example 6

[0092] The composition of the lubricating oil additive of this embodiment is shown in Table 6:

[0093] Table 6

[0094] name Mass percentage / % Ionic liquid (n=6) 30 Dioctyldiphenylamine 29 Isononylphenoxyacetic acid 5 Alkyl thiadiazole 5 Polyisobutylene Succinate 13 Oil soluble polyether 5 Polymethacrylate 5 Inert neutral oil 8

[0095] Example 7

[0096] The lubricating oil in this embodiment is obtained by mixing the lubricating oil additive in embodiment 1 with a Class II base oil;

[0097] Wherein, based on the total mass of the lubricating oil, the mass percentage of the lubricating oil additive is 2%.

[0098] Example 8

[0099] The lubricating oil in this embodiment is substantially the same as that in Embodiment 7, the only difference being that the lubricating oil additive is the lubricating oil additive in Embodiment 2.

[0100] Example 9

[0101] The lubricating oil in this embodiment is basically the same as that in Embodiment 7, the only difference being that the lubricating oil additive is the lubricating oil additive in Embodiment 3.

[0102] Example 10

[0103] The lubricating oil in this embodiment is basically the same as that in Embodiment 7, the only difference being that the lubricating oil additive is the lubricating oil additive in Embodiment 4.

[0104] Embodiment 11

[0105] The lubricating oil in this embodiment is basically the same as that in Embodiment 7, the only difference being that the lubricating oil additive is the lubricating oil additive in Embodiment 5.

[0106] Example 12

[0107] The lubricating oil in this embodiment is substantially the same as that in Embodiment 7, the only difference being that the lubricating oil additive is the lubricating oil additive in Embodiment 6.

[0108] Comparative Example 1

[0109] The composition of the lubricating oil additive of this comparative example is shown in Table 7:

[0110] Table 7

[0111] name Mass percentage / % Dioctyldiphenylamine 40 Isononylphenoxyacetic acid 10 Alkyl thiadiazole 10 Polyisobutylene Succinate 10 Oil soluble polyether 1 Polymethacrylate 1 Inert neutral oil 28

[0112] Comparative Example 2

[0113] The composition of the lubricating oil additive of this comparative example is shown in Table 8:

[0114] Table 8

[0115] name Mass percentage / % 2,6-Di-tert-butyl-p-cresol 10 Octylbutyldiphenylamine 60 Succinic acid 5 Tolyltriazole 5 No chlorosuccinimide 5 Amine and ethylene oxide condensation product 2 Polyacrylate 2 Inert neutral oil 11

[0116] Comparative Example 3

[0117] The composition of the lubricating oil additive of this comparative example is shown in Table 9:

[0118] Table 9

[0119] name Mass percentage / % Ionic liquid (n=6) 45 Dioctyldiphenylamine 24 Isononylphenoxyacetic acid 5 Alkyl thiadiazole 5 Polyisobutylene Succinate 10 Oil soluble polyether 3 Polymethacrylate 3 Inert neutral oil 5

[0120] Comparative Example 4

[0121] The composition of the lubricating oil additive of this comparative example is shown in Table 10:

[0122] Table 10

[0123]

[0124]

[0125] Comparative Example 5

[0126] The lubricating oil in this comparative example is basically the same as that in Example 7, the only difference being that the lubricating oil additive is the lubricating oil additive in Comparative Example 1.

[0127] Comparative Example 6

[0128] The lubricating oil in this comparative example is basically the same as that in Example 7, the only difference being that the lubricating oil additive is the lubricating oil additive in Comparative Example 2.

[0129] Comparative Example 7

[0130] The lubricating oil in this comparative example is basically the same as that in Example 7, the only difference being that the lubricating oil additive is the lubricating oil additive in Comparative Example 3.

[0131] Comparative Example 8

[0132] The lubricating oil in this comparative example is substantially the same as that in Example 7, except that the lubricating oil additive is the lubricating oil additive in Comparative Example 4.

[0133] Performance Characterization

[0134] 1. The performance of Group II base oil was tested. The test results are shown in Table 11.

[0135] Table 11

[0136]

[0137]

[0138] 2. The lubricating oils in Examples 7-12 and Comparative Examples 5-8 were subjected to performance tests. The test results are shown in Table 12.

[0139] Table 12

[0140]

[0141] It can be seen from Table 12 that the lubricating oil prepared in the embodiment of the present invention has relatively excellent antioxidant, corrosion resistance and rust resistance.

[0142] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lubricating oil additive, characterized in that: According to the mass percentage, it includes: Wherein, the ionic liquid comprises the following structure: Wherein, n is a positive integer selected from 4 to 7; The mass ratio of the antioxidant to the ionic liquid is 1:(1-3); The antioxidant is selected from at least one of dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, styryloctyldiphenylamine, α-methylstyryldiphenylamine and N,N'-sec-butyl-p-phenylenediamine.

2. The lubricating oil additive according to claim 1, characterized in that: The rust inhibitor is selected from at least one of isononylphenoxyacetic acid, sorbitan monooleate, alkenylsuccinic acid and barium dinonylnaphthalenesulfonate.

3. The lubricating oil additive according to claim 1, characterized in that The metal deactivator is selected from at least one of alkylthiadiazole methylbenzotriazole and N,N'-disalicylidenepropylenediamine.

4. The lubricating oil additive according to claim 1, characterized in that The dispersant is selected from at least one of polyisobutylene succinate, chloro-free succinimide and isobutylene succinimide.

5. The lubricating oil additive according to claim 1, characterized in that: The demulsifier is selected from at least one of oil-soluble polyether, condensate of amine and ethylene oxide, and condensate of fatty alcohol and ethylene oxide.

6. The lubricating oil additive according to claim 1, characterized in that: The antifoaming agent is selected from at least one of a composite antifoaming agent, polymethacrylate, and polyacrylate; and / or, The diluent oil is an inert neutral oil.

7. A lubricating oil, characterized in that: The lubricating oil additive comprises the lubricating oil additive according to any one of claims 1 to 6.

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