Complexing agent for air compressor oil, preparation method of complexing agent and air compressor oil

Abstract

The invention provides an air compressor oil complexing agent, a preparation method thereof and air compressor oil, and relates to the technical field of air compressor oil. The air compressor oil complexing agent provided by the invention has excellent oxidation resistance, can reduce the generation of oil sludge and coke, and keeps good demulsification performance at the same time. Besides, the complexing agent disclosed by the invention has excellent oil solubility and flowability, reduces the difficulty of large-scale production, and is suitable for various base oils including poly-alpha olefin and poly (alkylene) glycol base oils, so that the service life of the air compressor oil is longer, the operation efficiency of equipment is improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of air compressor oil, and in particular to an air compressor oil compound and a preparation method thereof, and air compressor oil. Background Art

[0002] Air compressor oil is exposed to a high temperature oxidation environment of 70-100°C for a long time during operation, so antioxidants are one of the most important additives to ensure the life of air compressor oil. When phenolic antioxidants are used alone, their high temperature antioxidant effect is poor, and they usually need to be used in combination with amine antioxidants to achieve a synergistic effect. Although amine antioxidants have a better antioxidant effect, excessive use will increase the tendency of deposit formation, leading to the formation of sludge and coking.

[0003] Dispersants and detergents can improve the detergency problem caused by the large-scale use of amine antioxidants, reduce the formation of sludge and coking, and keep the air compressor oil clean. However, these additives will affect the anti-emulsification performance of the air compressor oil, making it difficult to achieve an ideal balance among various properties.

[0004] Traditional air compressor oil additives often have a large kinematic viscosity, which increases the difficulty of actual production operations. In addition, the types of applicable base oils are limited, and the solubility and effect of additives suitable for mineral air compressor oils in synthetic base oils are limited.

[0005] For air compressor oil with longer life, such as air compressor oil with a life of 8,000 hours, the overall dosage of the compounding agent is usually 4% to 7%, or even higher. However, a higher dosage is difficult to dissolve in synthetic oils such as polyalphaolefin and poly(alkylene) glycol base oils, making the lubricating oil turbid and affecting its performance.

[0006] Therefore, there is an urgent need to develop an air compressor oil compound with balanced performance, so that the formulated air compressor oil has excellent antioxidant properties, high cleanliness and good anti-emulsification properties, as well as excellent oil solubility and fluidity, and is suitable for various air compressor oil base oils to solve various problems existing in the actual application of air compressor oil. Summary of the invention

[0007] The object of the present invention is to provide an air compressor oil compound and a preparation method thereof, and air compressor oil. The air compressor oil compound has excellent oxidation resistance, can reduce the generation of sludge and coking, and maintains good anti-emulsification performance. In addition, the compound of the present invention has excellent oil solubility and fluidity, reduces the difficulty of large-scale production, and is suitable for various base oils, including polyalphaolefins and poly (alkylene) glycol base oils, thereby achieving a longer service life of the air compressor oil, improving the operating efficiency of the equipment, and reducing maintenance costs.

[0008] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0009] The present invention provides an air compressor oil compound, which comprises the following components based on 100 parts by weight:

[0010] 25-35 parts of amine antioxidants, 25-35 parts of phenolic antioxidants and / or phenolic ester antioxidants, 3-6 parts of antioxidants and anticorrosives, 2-5 parts of extreme pressure and antiwear agents, 3-8 parts of metal deactivators, 3-7 parts of rust inhibitors, 3-7 parts of dispersants, 2-6 parts of detergents, and 15-20 parts of ester diluent oils;

[0011] The amine antioxidant is one or more of alkylated diphenylamine, N-phenyl-α-naphthylamine and alkylated phenyl-α-naphthylamine.

[0012] Preferably, the alkylated diphenylamine comprises nonyl diphenylamine and / or octyl butyl diphenylamine;

[0013] The alkylated phenyl-α-naphthylamine includes octylated phenyl-α-naphthylamine.

[0014] Preferably, the phenolic antioxidant comprises at least one of 2,6-di-tert-butyl-p-cresol, 2,2'-methylenebis-(4-methyl-6-tert-butylphenol) and liquid high molecular weight phenol;

[0015] The phenolic ester antioxidant comprises at least one of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate n-octadecyl alcohol ester and tetra(3,5-di-tert-butyl-4-hydroxy)phenyl propionate pentaerythritol ester.

[0016] Preferably, the antioxidant and anticorrosive agent is at least one of dialkyl dithiocarbamate and dialkyl dithiophosphate zinc;

[0017] The rust inhibitor is at least one of dodecenylsuccinic acid and isononylphenoxyacetic acid;

[0018] The detergent is a high-alkalinity synthetic calcium sulfonate, and the total alkalinity of the high-alkalinity synthetic calcium sulfonate is ≥300 mg KOH / g.

[0019] Preferably, the extreme pressure anti-wear agent is at least one of dialkyl dithiophosphate, tricresyl phosphate and triaryl phosphate.

[0020] Preferably, the metal deactivator is at least one of methylbenzotriazole, N,N'-dialkylaminomethylenebenzotriazole, N,N-di(2-ethylhexyl)-1H-methylbenzotriazole-1-methylamine and 2-mercaptobenzothiazole.

[0021] Preferably, the dispersant is at least one of monosuccinimide, bissuccinimide, polyisobutylene succinimide and chloro-free succinimide.

[0022] Preferably, the ester diluent oil is trimethylolpropane neodecanoate.

[0023] The present invention provides a method for preparing the air compressor oil compound described in the above scheme, comprising the following steps: heating the ester diluent oil to 50-60° C., and then adding the remaining components to obtain the air compressor oil compound.

[0024] The present invention provides an air compressor oil, comprising a base oil and a compounding agent, wherein the compounding agent is the air compressor oil compounding agent described in the above scheme or the air compressor oil compounding agent prepared by the preparation method described in the above scheme.

[0025] The invention provides an air compressor oil compound, which comprises the following components based on 100 parts by total weight: 25-35 parts of amine antioxidants, 25-35 parts of phenolic antioxidants and / or phenolic ester antioxidants, 3-6 parts of antioxidants and anticorrosives, 2-5 parts of extreme pressure antiwear agents, 3-8 parts of metal deactivators, 3-7 parts of rust inhibitors, 3-7 parts of dispersants, 2-6 parts of detergents, and 15-20 parts of ester diluent oils; the amine antioxidants are one or more of alkylated diphenylamine, N-phenyl-α-naphthylamine and alkylated phenyl-α-naphthylamine.

[0026] The beneficial effects of the present invention are:

[0027] Excellent antioxidant properties: The present invention uses one or more of alkylated diphenylamine, N-phenyl-α-naphthylamine and alkylated phenyl-α-naphthylamine as amine antioxidants, and combines them with phenolic and / or phenolic ester antioxidants to significantly improve the antioxidant effect and reduce sludge generation; the composite agent performs well at an operating temperature of 70 to 100°C, prolongs the service life of the air compressor oil to more than 10,000 hours, and effectively reduces equipment maintenance costs.

[0028] Excellent cleanliness: The antioxidant used in the present invention can effectively reduce the tendency of sludge and coking. When used in combination with a suitable amount of dispersant and detergent, it can keep the inside of the air compressor clean and ensure the normal operation of the equipment.

[0029] Excellent anti-emulsification performance: The composite agent of the present invention improves the antioxidant property and detergency while still maintaining good anti-emulsification performance, making the overall performance of the air compressor oil more balanced and stable.

[0030] Improved solubility and fluidity: The present invention adopts ester base oil as diluent oil, which significantly improves the solubility and fluidity of the composite agent, makes the production operation simpler, and reduces the production cost.

[0031] Wide applicability: The composite agent of the present invention is suitable for various base oils, including mineral oil, poly-alpha-olefin and poly(alkylene) glycol base oils, etc. It has excellent solubility and performance and can meet the needs of different types of air compressor oils. DETAILED DESCRIPTION

[0032] The present invention provides an air compressor oil compound, which comprises the following components based on 100 parts by weight:

[0033] 25-35 parts of amine antioxidants, 25-35 parts of phenolic antioxidants and / or phenolic ester antioxidants, 3-6 parts of antioxidants and anticorrosives, 2-5 parts of extreme pressure and antiwear agents, 3-8 parts of metal deactivators, 3-7 parts of rust inhibitors, 3-7 parts of dispersants, 2-6 parts of detergents, and 15-20 parts of ester diluent oils;

[0034] The amine antioxidant is one or more of alkylated diphenylamine, N-phenyl-α-naphthylamine and alkylated phenyl-α-naphthylamine.

[0035] The total mass parts are 100 parts. The air compressor oil compound provided by the present invention includes 25 to 35 parts of amine antioxidants, preferably 28 to 33 parts. In the embodiments of the present invention, it is specifically 25 parts, 28 parts or 33 parts. In the present invention, the amine antioxidant is one or more of alkylated diphenylamine, N-phenyl-α-naphthylamine and alkylated phenyl-α-naphthylamine; the alkylated diphenylamine preferably includes nonyl diphenylamine and / or octyl butyl diphenylamine; the alkylated phenyl-α-naphthylamine preferably includes octylated phenyl-α-naphthylamine. In the present invention, the amine antioxidant is used as the main antioxidant, and its function is chain termination, also called free radical terminator, which is used to provide excellent antioxidant properties while avoiding the formation of sludge and coking.

[0036] The total mass parts are 100 parts, and the air compressor oil compound provided by the present invention includes 25 to 35 parts of phenolic antioxidants and / or phenolic ester antioxidants, preferably 28 to 35 parts. In the embodiment of the present invention, it is specifically 30 parts or 35 parts. In the present invention, the phenolic antioxidant preferably includes at least one of 2,6-di-tert-butyl-p-cresol, 2,2'-methylenebis-(4-methyl-6-tert-butylphenol) and liquid high molecular weight phenol; the liquid high molecular weight phenol is preferably Irganox L 135 and / or Irganox L115 of BASF; the phenolic ester antioxidant preferably includes at least one of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate n-octadecyl alcohol ester and tetra(3,5-di-tert-butyl-4-hydroxy)phenylpropionate pentaerythritol ester. In the present invention, the role of the phenolic antioxidant and / or phenolic ester antioxidant is to cooperate with the amine antioxidant to enhance the antioxidant effect.

[0037] The total mass parts are 100 parts, and the air compressor oil compound provided by the present invention includes 3 to 6 parts of antioxidant and anti-corrosion agent, which can be specifically 3 parts, 4 parts, 5 parts or 6 parts, which are not listed here. In the present invention, the antioxidant and anti-corrosion agent is preferably at least one of dialkyl dithiocarbamate and dialkyl dithiophosphate zinc. In the present invention, the antioxidant and anti-corrosion agent functions to improve the overall stability of the compound.

[0038] The total mass parts are 100 parts, and the air compressor oil compound provided by the present invention includes 2 to 5 parts of extreme pressure anti-wear agent, specifically 2 parts, 3 parts, 4 parts or 5 parts. In the present invention, the extreme pressure anti-wear agent is preferably at least one of dialkyl dithiophosphate, tricresol phosphate and triaryl phosphate. The function of the extreme pressure anti-wear agent is to ensure excellent lubrication effect under high pressure and high temperature conditions.

[0039] The total mass parts are 100 parts, and the air compressor oil compound provided by the present invention includes 3 to 8 parts of metal deactivator, preferably 4 to 7 parts, and more preferably 5 to 6 parts. In the present invention, the metal deactivator is preferably at least one of methyl benzotriazole, N,N'-dialkylaminomethylene benzotriazole, N,N-di(2-ethylhexyl)-1H-methylbenzotriazole-1-methylamine and 2-mercaptobenzothiazole. In the present invention, the function of the metal deactivator is to effectively inhibit the metal-catalyzed oxidation reaction.

[0040] The total mass parts are 100 parts, and the air compressor oil compound provided by the present invention includes 3 to 7 parts of rust inhibitor, specifically 3 parts, 4 parts, 5 parts, 6 parts or 7 parts. The rust inhibitor is preferably at least one of dodecenylsuccinic acid and isononylphenoxyacetic acid. In the present invention, the function of the rust inhibitor is to provide long-term rust protection.

[0041] The total mass parts are 100 parts, and the air compressor oil compound provided by the present invention includes 3 to 7 parts of dispersant, specifically 3 parts, 4 parts, 5 parts, 6 parts or 7 parts. In the present invention, the dispersant is preferably at least one of monosuccinimide, bissuccinimide, polyisobutylene succinimide and chloro-free succinimide. The function of the dispersant of the present invention is to improve detergency.

[0042] The total mass parts are 100 parts, and the air compressor oil compound provided by the present invention includes 2 to 6 parts of detergent, which can be specifically 2 parts, 3 parts, 4 parts, 5 parts or 6 parts, which are not listed here. In the present invention, the detergent is preferably a high-base synthetic calcium sulfonate, and the total base value of the high-base synthetic calcium sulfonate is preferably ≥300 mg KOH / g, more preferably ≥400 mg KOH / g. The detergent of the present invention is to prevent the formation of sludge and carbon deposits.

[0043] The dispersant and detergent selected in the present invention have little effect on the interfacial tension, and while playing the role of dispersing and solubilizing, they are not easy to destroy the anti-emulsification property.

[0044] The total mass parts are 100 parts, and the air compressor oil compound provided by the present invention includes 15 to 20 parts of ester diluent oil, specifically 15 parts, 16 parts, 17 parts, 18 parts, 19 parts or 20 parts. In the present invention, the ester diluent oil is preferably trimethylolpropane neodecanoate. The present invention uses ester diluent oil to improve the fluidity, solubility and stability of the compound.

[0045] The components of the present invention cooperate to form a composite agent with excellent oxidation resistance, which can reduce the generation of sludge and coking, while maintaining good anti-emulsification performance. In addition, the composite agent of the present invention has excellent oil solubility and fluidity, reduces the difficulty of large-scale production, and is suitable for various base oils, including poly-alpha-olefin and poly (alkylene) glycol base oils, thereby achieving a longer service life of air compressor oil, improving the operating efficiency of equipment, and reducing maintenance costs.

[0046] The composite agent of the invention is particularly suitable for screw air compressor oil with a working temperature of 70-90°C.

[0047] The present invention provides a method for preparing the air compressor oil compound described in the above scheme, comprising the following steps: heating the ester diluent oil to 50-60° C., and then adding the remaining components to obtain the air compressor oil compound.

[0048] After the remaining components are added, the present invention preferably stirs for 1 hour to obtain the air compressor oil compound.

[0049] The present invention provides an air compressor oil, comprising a base oil and a compounding agent, wherein the compounding agent is the above-mentioned air compressor oil compounding agent. In the present invention, when the base oil is a mineral oil, the mass content of the compounding agent in the air compressor oil is 0.8% to 2%, and the air compressor oil at this time can be used as an air compressor oil for 2000 to 6000 hours; when the base oil is a synthetic oil, specifically, such as a Class IV (PAO) base oil or a Class V base oil (PAG) (not limited to these two), the mass content of the compounding agent in the air compressor oil is preferably 2.5% to 3%, and the air compressor oil at this time can be used as an air compressor oil for 8000 hours.

[0050] The air compressor oil compound and its preparation method and air compressor oil provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be understood as limiting the protection scope of the present invention.

[0051] The preparation method of the air compressor oil compound in the following embodiments is as follows:

[0052] The trimethylolpropane neodecanoate was heated to 50-60° C., and then the remaining components were added and stirred for 1 hour to obtain an air compressor oil compound.

[0053] Example 1

[0054] The composition and content of the low-viscosity air compressor oil compound with high anti-oxidation properties, high cleanliness and excellent anti-emulsification performance provided in Example 1 of the present invention are shown in Table 1.

[0055] Table 1 Composition of Example 1

[0056] composition Mass ratio / % Octylated phenyl-α-naphthylamine 25 2,2'-Methylenebis-(4-methyl-6-tert-butylphenol) 35 Dialkyl dithiocarbamate 3 Dialkyl dithiophosphates 4 N,N'-Dialkylaminomethylenebenzotriazole 4 Dodecenylsuccinic acid 5 No chlorosuccinimide 2 High base synthetic calcium sulfonate (total base value ≥ 400mgKOH / g) 2 Trimethylolpropane neodecanoate 20

[0057] Example 2

[0058] The composition and content of the low-viscosity air compressor oil compound with high anti-oxidation properties, high cleanliness and excellent anti-emulsification performance provided by Example 2 of the present invention are shown in Table 2.

[0059] Table 2 Example 2 Composition

[0060] composition Mass ratio / % N-phenyl-α-naphthylamine 33 Pentaerythritol Tetrakis(3,5-di-tert-butyl-4-hydroxy)phenylpropionate 30 Dialkyl dithiocarbamate 4 Triaryl phosphate 4 N,N'-Dialkylaminomethylenebenzotriazole 4 Dodecenylsuccinic acid 4 No chlorosuccinimide 3 High base synthetic calcium sulfonate (total base value ≥ 400mgKOH / g) 3 Trimethylolpropane neodecanoate 15

[0061] Example 3

[0062] The composition and content of the low-viscosity air compressor oil compound with high anti-oxidation properties, high cleanliness and excellent anti-emulsification performance provided by Example 3 of the present invention are shown in Table 3.1.

[0063] Table 3.1 Composition of Example 3

[0064]

[0065]

[0066] Example 4

[0067] The composition and content of the low-viscosity air compressor oil compound with high anti-oxidation properties, high cleanliness and excellent anti-emulsification performance provided by Example 4 of the present invention are shown in Table 4.1.

[0068] Table 4 Example 4 Composition

[0069] composition Mass ratio / % Octylpentyl diphenylamine 28 Liquid high molecular weight phenol (BASF Irganox L135) 35 Dialkyl dithiocarbamate 5 Dialkyl dithiophosphates 4 2-Mercaptobenzothiazole 4 Isononylphenoxyacetic acid 3 Succinimide 3 High base synthetic calcium sulfonate (total base value ≥ 300mgKOH / g) 3 Trimethylolpropane neodecanoate 15

[0070] The low-viscosity air compressor oil compound with high-efficiency antioxidant properties, high cleanliness and excellent anti-emulsification performance obtained in Examples 1 to 4 was added to Class II mineral base oil at 2% of the total mass of the air compressor oil to blend the oil product, and the performance of the resulting blended oil product was tested.

[0071] The mineral air compressor oil blended with the screw air compressor oil compound with high cleanliness and antioxidant properties of Examples 1 to 4 has a composition and content as shown in Table 5.

[0072] Table 5 Example air compressor oil composition

[0073] composition Mass ratio / % Embodiment 1~4 composite agent 2.0 T921 (No. 1 composite defoamer) 0.01 T1001 anti-emulsifier 0.0075 150N base oil 58 500N base oil 40

[0074] Comparative Examples 1 and 2 are two commercially available air compressor oil compounding agents (Comparative Example 1 uses XiRun 2027 air compressor oil compounding agent, purchased from Jinzhou Xirun Technology Co., Ltd.; Comparative Example 2 uses Lubmat 5101, Makoso (Suzhou) Petrochemical Co., Ltd.). Two commercially available air compressor oil compounding agents are used for formulation. Except for the compounding agent, the other additives are the same as those in Example 1, and their compositions and contents are shown in Table 6.

[0075] Table 6 Comparative Example Air Compressor Oil Composition

[0076] composition Mass ratio / % Air compressor oil compound 1~2 2.0 T921 (No. 1 composite defoamer) 0.01 T1001 anti-emulsifier 0.0075 150N base oil 58 500N base oil 40

[0077] Table 7 is a comparison of the basic physical and chemical indicators of Examples 1-4 and Comparative Examples 1-2. It can be seen from Table 7 that the viscosity index of Examples 1-4 is slightly higher than that of Comparative Examples 1-2.

[0078] Table 7 Comparison of physical and chemical indicators of Examples 1 to 4 and Comparative Examples 1 to 2

[0079]

[0080] Table 8 is a comparison of the antioxidant properties of Examples 1 to 4 and Comparative Examples 1 to 2.

[0081] Table 8 Comparison of the antioxidant properties of Examples 1 to 4 and Comparative Examples 1 to 2

[0082]

[0083] As shown in Table 8, the rotating oxygen bomb data of Examples 1 to 4 are 100 to 200 minutes higher than those of Comparative Examples 1 to 2, and the initial oxidation temperatures are also higher than those of Comparative Examples 1 to 2, indicating that the air compressor oil compound of the present invention has excellent antioxidant properties.

[0084] Table 9 is a comparison of the detergency performance of Examples 1 to 4 and Comparative Examples 1 to 2.

[0085] Table 9 Detergency comparison of Examples 1 to 4 and Comparative Examples 1 to 2

[0086]

[0087] As can be seen from Table 9, in the thermal stability test, the total amount of sediment produced by Examples 1 to 4 is less; the amount of coking produced by Examples 1 to 4 in the coking plate test is also much lower than that of Comparative Examples 1 to 2, indicating that the composite agent scheme of the present invention has excellent anti-sludge and coking generation capabilities.

[0088] Table 10 is a comparison of the demulsification of Examples 1 to 4 and Comparative Examples 1 to 2.

[0089] Table 10 Demulsification comparison of Examples 1 to 4 and Comparative Examples 1 to 2

[0090]

[0091] It can be seen from Table 10 that Examples 1 to 4 have excellent antioxidant and detergency while still maintaining good anti-emulsification performance.

[0092] Table 11 is the comparative data of viscosity and solubility of the composite agents of Examples 1 to 4 and Comparative Examples 1 to 2.

[0093] Table 11 Comparative data of solubility and fluidity of Examples 1 to 4 and Comparative Examples 1 to 2

[0094]

[0095] As shown in Table 11, the kinematic viscosity at 40°C of Examples 1 to 4 is much lower than that of Comparative Examples 1 to 2, which makes it easier to operate in production and reduces the difficulty of production. At the same time, Comparative Examples 1 to 4 have excellent solubility in mineral oil, polyalphaolefin and poly(alkylene) glycol base oils, but the solubility of the comparative examples in synthetic oils is limited, and the addition of 8% causes the base oil to become turbid.

[0096] The performance comparison between Examples 1 to 4 and Comparative Examples 1 to 2 shows that the air compressor oil compound of the present invention has excellent antioxidant and thermal decomposition resistance, and can effectively extend the service life of the air compressor oil.

[0097] The air compressor oil compound of the present invention has excellent detergency, is not prone to produce sediments such as sludge and coking, ensures the internal cleanliness of the air compressor, and effectively prolongs the operating life of the equipment.

[0098] The air compressor oil prepared by the air compressor oil compound of the present invention has excellent anti-oxidation and detergency while still maintaining good anti-emulsification properties, thus providing long-term lubrication protection for the compressor system.

[0099] The air compressor oil compound of the present invention has excellent solubility and fluidity, is applicable to various base oils, is conducive to reducing the difficulty of production operation, and improves the upper limit of product performance.

[0100] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An air compressor oil compound, characterized in that: The total mass parts are 100 parts, including the following components: 25-35 parts of amine antioxidants, 25-35 parts of phenolic antioxidants and / or phenolic ester antioxidants, 3-6 parts of antioxidants and anticorrosives, 2-5 parts of extreme pressure and antiwear agents, 3-8 parts of metal deactivators, 3-7 parts of rust inhibitors, 3-7 parts of dispersants, 2-6 parts of detergents, and 15-20 parts of ester diluent oils; The amine antioxidant is one or more of alkylated diphenylamine, N-phenyl-α-naphthylamine and alkylated phenyl-α-naphthylamine.

2. The air compressor oil compound according to claim 1, characterized in that: The alkylated diphenylamine includes nonyl diphenylamine and / or octyl butyl diphenylamine; The alkylated phenyl-α-naphthylamine includes octylated phenyl-α-naphthylamine.

3. The air compressor oil compound according to claim 1, characterized in that: The phenolic antioxidant comprises at least one of 2,6-di-tert-butyl-p-cresol, 2,2'-methylenebis-(4-methyl-6-tert-butylphenol) and liquid high relative molecular mass phenol; The phenolic ester antioxidant comprises at least one of 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate n-octadecyl alcohol ester and tetrakis(3,5-di-tert-butyl-4-hydroxy)phenyl propionate pentaerythritol ester.

4. The air compressor oil compound according to claim 1, characterized in that: The antioxidant and anticorrosive agent is at least one of dialkyl dithiocarbamate and dialkyl dithiophosphate zinc; The rust inhibitor is at least one of dodecenylsuccinic acid and isononylphenoxyacetic acid; The detergent is a high-alkalinity synthetic calcium sulfonate, and the total alkalinity of the high-alkalinity synthetic calcium sulfonate is ≥300 mg KOH / g.

5. The air compressor oil compound according to claim 1, characterized in that: The extreme pressure anti-wear agent is at least one of dialkyl dithiophosphate, tricresyl phosphate and triaryl phosphate.

6. The air compressor oil compound according to claim 1, characterized in that: The metal deactivator is at least one of methylbenzotriazole, N,N'-dialkylaminomethylenebenzotriazole, N,N-di(2-ethylhexyl)-1H-methylbenzotriazole-1-methylamine and 2-mercaptobenzothiazole.

7. The air compressor oil compound according to claim 1, characterized in that: The dispersant is at least one of monosuccinimide, bissuccinimide, polyisobutylene succinimide and chloro-free succinimide.

8. The air compressor oil compound according to claim 1, characterized in that: The ester diluent oil is trimethylolpropane neodecanoate.

9. The method for preparing the air compressor oil compound according to any one of claims 1 to 8, characterized in that: The following steps are involved: The ester diluent oil is heated to 50-60° C., and then the remaining components are added to obtain the air compressor oil compound.

10. An air compressor oil, characterized in that: The invention comprises a base oil and a compounding agent, wherein the compounding agent is the air compressor oil compounding agent according to any one of claims 1 to 8 or the air compressor oil compounding agent prepared by the preparation method according to claim 9.

Images