Compressor oil additive composition and method of making and compressor oil

Abstract

The application discloses a compressor oil additive composition, which comprises the following components in percentage by mass: 10-50% of an antioxidant, 5-30% of a double ionic liquid, 5-20% of an extreme pressure anti-wear agent, 2-8% of a light stabilizer, 1-5% of a demulsifier, 1-5% of an antifoaming agent, and the balance of diluents, wherein the sum of the percentage by mass of the above components is 100%. The application further discloses a compressor oil, which is prepared by blending the composition with a mineral type base oil or a synthetic type base oil. The double ionic liquid complex system of the double imidazole cation and the double phosphate anion exhibits excellent rust resistance, corrosion resistance and oxidation resistance, can provide good protection for metal under high temperature and high pressure and strong corrosion environment, reduces the generation of carbon deposition, paint film and sludge, and also has excellent thermal stability, extreme pressure anti-wear property, emulsion resistance and antifoaming property, and meets the lubrication requirements of compressor equipment under high temperature and high pressure and strong corrosion environment in the petroleum refining, large ship and other industries.

Description

Technical Field

[0001] This invention belongs to the field of lubricating oil additive preparation technology, specifically relating to compressor oil additive compositions, methods for preparing compressor oil additive compositions, and compressor oils. Background Technology

[0002] With the development of compression technology, large compressor equipment is being used in more and more scenarios, especially in industries such as petroleum refining and large ships. The accompanying high temperature, high pressure, and highly corrosive environments pose higher challenges to the lubrication requirements of compressor equipment. Under high temperature, high pressure, and seawater corrosion conditions, lubricating oil is prone to deterioration due to insufficient performance, leading to the formation of carbon deposits, varnish, sludge, etc., which can corrode equipment, causing serious damage and affecting normal operation. Therefore, compressor oils used to lubricate compressor equipment in high temperature, high pressure, and highly corrosive environments need to possess excellent rust prevention, corrosion resistance, oxidation resistance, thermal stability, extreme pressure anti-wear properties, demulsification, and anti-foaming properties. On the other hand, traditional rust inhibitors, corrosion inhibitors (metal passivators), extreme pressure anti-wear agents, and other additives can easily produce antagonistic effects, affecting the performance of the compressor oil and causing instability, resulting in sediment and other impurities.

[0003] While existing technologies can improve the aforementioned properties of compressor oils to some extent, the degree of improvement remains limited, especially in terms of rust prevention, corrosion resistance, and oxidation resistance, where further improvement is needed. Therefore, there is an urgent need to provide a compressor oil additive composition that combines superior rust prevention, corrosion resistance, oxidation resistance, thermal stability, extreme pressure anti-wear properties, demulsification, and anti-foaming properties, while simultaneously addressing the precipitation problem caused by antagonistic effects between additives. Currently, there are no reported applications or related information regarding the addition of dual-ionic liquid additive compositions to compressor oils. Summary of the Invention

[0004] The purpose of this invention is to provide a compressor oil additive composition that has excellent rust prevention, corrosion resistance and oxidation resistance.

[0005] Another object of the present invention is to provide a compressor oil, which is formulated by blending a compressor oil additive composition with a mineral base oil or a synthetic base oil.

[0006] The technical solution adopted in this invention is a compressor oil additive composition, which includes the following components by mass percentage: antioxidant 10-50%, dual ionic liquid 5-30%, extreme pressure anti-wear agent 5-20%, light stabilizer 2-8%, demulsifier 1-5%, antifoaming agent 1-5%, and the balance being diluent. The sum of the mass percentages of the above components is 100%.

[0007] The invention is further characterized in that,

[0008] Antioxidants, by mass percentage, include: 30-50% amine antioxidants, 30-50% phenolic antioxidants, and 20-40% auxiliary antioxidants, with the sum of the mass percentages of the above components being 100%.

[0009] Amine antioxidants are at least one of octylbutyldiphenylamine, dioctyldiphenylamine, dinonyldiphenylamine, styrenated diphenylamine, and N,N'-sec-butyl-p-phenylene diamine; phenolic antioxidants have the following structure:

[0010]

[0011] Where n is a positive integer between 12 and 18;

[0012] The auxiliary antioxidants are pentaerythritol diphosphite and pentaerythritol tetra(3-lauryl thiopropionate).

[0013] The extreme pressure anti-wear agent is at least one of triphenyl thiophosphate, butyltriphenyl thiophosphate, dialkyl dithiophosphate, and fatty phosphate amine salt; the light stabilizer is dimethyl sebacate.

[0014] The demulsifier is at least one of oil-soluble polyether DL32, LZ5957, and polyethyleneimine alkoxylate 9393; the antifoaming agent is at least one of methyl silicone oil T903, No. 1 composite antifoaming agent T921, and No. 2 composite antifoaming agent T922; and the diluent is PCL150SN.

[0015] The structure of ionic liquids is as follows:

[0016]

[0017] Where n is a positive integer between 12 and 18.

[0018] The beneficial effects of the present invention are as follows: The compressor oil additive composition of the present invention has excellent rust prevention, corrosion resistance and oxidation resistance, and can provide good protection for metals in high temperature, high pressure and strong corrosion environment, reduce the formation of carbon deposits, varnish and sludge, and also has excellent thermal stability, extreme pressure anti-wear, anti-emulsification and anti-foaming properties, which meet the lubrication requirements of compressor equipment in high temperature, high pressure and strong corrosion environment in industries such as petroleum refining and large ships. Detailed Implementation

[0019] The present invention will now be described in detail with reference to specific embodiments.

[0020] The compressor oil additive composition of the present invention comprises the following components by mass percentage: 10-50% antioxidant, 5-30% diionic liquid, 5-20% extreme pressure anti-wear agent, 2-8% light stabilizer, 1-5% demulsifier, 1-5% antifoaming agent, and the balance being diluent. The sum of the mass percentages of the above components is 100%.

[0021] The antioxidants, by mass percentage, include: 30-50% amine antioxidants, 30-50% phenolic antioxidants, and 20-40% auxiliary antioxidants. The sum of the mass percentages of the above components is 100%. The combination of the three antioxidants in the specified proportions can give the lubricating oil better antioxidant properties.

[0022] Amine antioxidants, including at least one of octylbutyldiphenylamine, dioctyldiphenylamine, dinonyldiphenylamine, styrylated diphenylamine, and N,N'-sec-butyl-p-phenylene diamine, can significantly improve the antioxidant properties of lubricating oils.

[0023] The structure of phenolic antioxidants is as follows:

[0024]

[0025] Where n is a positive integer from 12 to 18, the phenolic antioxidant with this structure has excellent antioxidant properties and can effectively complex metal ions, reducing the formation of carbon deposits, paint film and sludge. In addition, the antioxidant has low volatility, further reducing the volatility of the antioxidant at high temperatures.

[0026] The auxiliary antioxidants are pentaerythritol bis(diphosphite) and pentaerythritol tetra(3-lauryl thiopropionate), with the following structure. They have superior performance compared to traditional thioester antioxidants, and when used in combination with amine and phenolic antioxidants, they can significantly improve the thermal stability of lubricating oil.

[0027]

[0028]

[0029] Extreme pressure anti-wear agents are at least one of triphenyl thiophosphate, butyltriphenyl thiophosphate, dialkyl dithiophosphate, and fatty phosphate amine salts. They can form a strong oil film on the metal surface, which can enhance extreme pressure anti-wear properties and reduce the coefficient of friction.

[0030] The light stabilizer is dimethyl sebacate, which has good compatibility with lubricating oil and can improve the thermal stability and weather resistance of lubricating oil, and reduce the tendency of lubricating oil to change color.

[0031] The demulsifier is at least one of oil-soluble polyether DL32, LZ5957, and polyethyleneimine alkoxylate 9393, which improves the demulsibility of lubricating oil by changing the oil-water interfacial tension.

[0032] The antifoaming agent is at least one of methyl silicone oil T903, No. 1 composite antifoaming agent T921, and No. 2 composite antifoaming agent T922, and is used to improve the antifoaming properties of lubricating oil.

[0033] The diluent is PCL150SN;

[0034] The structure of ionic liquids is as follows:

[0035]

[0036] Where n is a positive integer between 12 and 18;

[0037] The bis-ionic liquid is a complex system of bisimidazole cations and bisphosphonate anions. Using this bis-ionic liquid to prepare lubricating oil additives can improve the rust prevention and corrosion resistance of the lubricating oil additives, passivate metal activity, and enhance the protective ability of lubricating oil for metals. At the same time, the bis-ionic liquid has a synergistic effect with antioxidants, improving the oxidation resistance of lubricating oil and reducing the formation of carbon deposits, varnish, and sludge. The C12-18 alkyl chains in the bis-ionic liquid can increase the solubility, ensuring that it dissolves in oil under both high and low temperature conditions, and has excellent solubility and compatibility.

[0038] The preparation method of the compressor oil additive composition of the present invention is as follows: the compressor oil additive composition 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 impose any particular limitations on the order of addition of the raw materials, the stirring rate, or the mixing temperature.

[0039] The compressor oil of the present invention is formulated by blending a compressor oil additive composition with a mineral base oil or a synthetic base oil.

[0040] Example 1

[0041] The composition of the compressor oil additive composition in this embodiment is shown in Table 1:

[0042] Table 1 Composition of compressor oil additive composition

[0043] name Dosage % Diionic liquids (n=12) 5 Octylbutyldiphenylamine 15 Phenolic antioxidants (n=12) 15 Pentaerythritol dibis(diphosphite) 15 Pentaerythritol tetra(3-lauryl thiopropionate) 5 Triphenyl thiophosphate 5 Dimethyl sebacate 8 DL32 1 T903 1 PCL150SN 30 total 100

[0044] Example 2

[0045] The composition of the compressor oil additive composition in this embodiment is shown in Table 2:

[0046] Table 2 Composition of compressor oil additive composition

[0047] name Dosage % Diionic liquids (n=18) 30 dinonyldiphenylamine 4 Phenolic antioxidants (n=18) 4 Pentaerythritol dibis(diphosphite) 1 Pentaerythritol tetra(3-lauryl thiopropionate) 1 Butyltriphenylthiophosphate 20 Dimethyl sebacate 2 LZ5957 5 T921 5 PCL150SN 28 total 100

[0048] Example 3

[0049] The composition of the compressor oil additive composition in this embodiment is shown in Table 3:

[0050] Table 3 Composition of compressor oil additive composition

[0051]

[0052]

[0053] Comparative Example 1

[0054] The composition of the compressor oil additive composition in this comparative example is shown in Table 4:

[0055] Table 4 Composition of compressor oil additive composition

[0056]

[0057]

[0058] Comparative Example 2

[0059] The composition of the compressor oil additive composition in this comparative example is shown in Table 5:

[0060] Table 5 Composition of compressor oil additive composition

[0061] name Dosage % Diionic liquids (n=18) 35 dinonyldiphenylamine 2 Phenolic antioxidants (n=18) 2 Pentaerythritol dibis(diphosphite) 1 Pentaerythritol tetra(3-lauryl thiopropionate) 1 Butyltriphenylthiophosphate 25 Dimethyl sebacate 1 LZ5957 7 T921 7 PCL150SN 19 total 100

[0062] Comparative Example 3

[0063] The composition of the compressor oil additive composition in this comparative example is shown in Table 6:

[0064] Table 6 Composition of compressor oil additive composition

[0065]

[0066]

[0067] Taking Examples 1, 2, and 3 and Comparative Examples 1, 2, and 3 as examples, after blending with synthetic base oils PAO10 and PAO20, key performance tests were conducted on rust prevention, corrosion resistance, oxidation resistance, thermal stability, extreme pressure anti-wear properties, demulsification, and anti-foaming properties. The results are shown in Table 7 below:

[0068] Table 7. Performance test results of the compositions of the examples and comparative examples after blending with synthetic base oils.

[0069]

[0070]

[0071] The results above show that the oils formulated using the compressor oil additive compositions of Examples 1, 2, and 3 of this invention exhibit the following characteristics: passing the liquid phase corrosion B method, demonstrating excellent rust prevention; achieving a copper strip corrosion grade of 1a, indicating excellent corrosion resistance; achieving a rotating oxygen bomb test time exceeding 2200 min, demonstrating excellent oxidation resistance; exhibiting a total sediment weight of less than 5 mg / 100 mL, with no weight loss or discoloration in copper and steel rods, indicating good thermal stability; and achieving an FZG failure grade greater than 10, demonstrating outstanding extreme pressure anti-wear performance; while also exhibiting good anti-emulsification and anti-foaming properties. These results meet the lubrication requirements of compressor equipment in high-temperature, high-pressure, and highly corrosive environments in industries such as petroleum refining and large shipbuilding.

[0072] The results above show that the oils blended using Comparative Examples 1, 2, and 3 have lower performance than those of Examples 1, 2, and 3 due to the proportion of additives or the absence of dual-ionic liquids.

[0073] In this invention, a dual-ionic liquid compound system of bisimidazole cation and bisphosphonate anion is used, which exhibits excellent rust prevention, corrosion resistance and oxidation resistance. It can provide good protection for metals under high temperature, high pressure and strong corrosion environment, reduce the formation of carbon deposits, paint film and sludge. In addition, the composition also has excellent thermal stability, extreme pressure anti-wear, anti-emulsification and anti-foaming properties, which meet the lubrication requirements of compressor equipment under high temperature, high pressure and strong corrosion environment in industries such as petroleum refining and large ships.

[0074] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the claims of the present invention.

Claims

1. A compressor oil additive composition, characterized in that, The product comprises the following components by mass percentage: antioxidant 10-50%, biionic liquid 5-30%, extreme pressure anti-wear agent 5-20%, light stabilizer 2-8%, demulsifier 1-5%, antifoaming agent 1-5%, with the balance being diluent. The sum of the mass percentages of the above components is 100%. The light stabilizer is dimethyl sebacate; The antioxidant comprises, by mass percentage: 30-50% amine antioxidant, 30-50% phenolic antioxidant, and 20-40% auxiliary antioxidant, wherein the sum of the mass percentages of the above components is 100%. The amine antioxidant is at least one selected from octylbutyldiphenylamine, dioctyldiphenylamine, dinonyldiphenylamine, styrylated diphenylamine, and N,N'-sec-butyl-p-phenylene diamine; The structure of the phenolic antioxidant is as follows: Where n is a positive integer between 12 and 18; The auxiliary antioxidants are pentaerythritol bis(diphosphite) and pentaerythritol tetra(3-lauryl thiopropionate); the structural formula of pentaerythritol bis(diphosphite) is as follows: The structure of the dual-ionic liquid is as follows: Where n is a positive integer between 12 and 18.

2. The compressor oil additive composition according to claim 1, characterized in that, The extreme pressure anti-wear agent is at least one of triphenyl thiophosphate, butyltriphenyl thiophosphate, and dialkyl dithiophosphate.

3. The compressor oil additive composition according to claim 1, characterized in that, The demulsifier is at least one of oil-soluble polyether DL32, LZ5957, and polyethyleneimine alkoxylate 9393; the antifoaming agent is at least one of methyl silicone oil T903, No. 1 composite antifoaming agent T921, and No. 2 composite antifoaming agent T922; and the diluent is PCL150SN.

4. Compressor oil, characterized in that, The compressor oil additive composition according to any one of claims 1-3 is blended with mineral base oil or synthetic base oil.

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