Compressor oil additive composition, preparation method and compressor oil

Abstract

The invention discloses a compressor oil additive composition which comprises the following components in percentage by mass: 10-50% of an antioxidant, 5-30% of 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 anti-foaming agent and the balance of a diluent, and the sum of the mass percentages of the components is 100%. The invention also discloses compressor oil which is prepared by blending the composition with mineral base oil or synthetic base oil. A double-ionic liquid compounding system of double imidazole cations and double phosphoric acid anions is adopted, so that excellent anti-rust property, corrosion resistance and oxidation resistance are shown, metal can be well protected in a high-temperature, high-pressure and strong-corrosion environment, generation of carbon deposit, paint film and oil sludge is reduced, and the service life of the cutting fluid is prolonged. And the lubricating oil also has excellent thermal stability, extreme pressure antiwear property, demulsibility and anti-foaming property, and meets the lubricating requirements of compressor equipment in high-temperature, high-pressure and strong-corrosion environments in the industries of petroleum refining, large ships and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of lubricating oil additive preparation, and in particular relates to a compressor oil additive composition, a preparation method of the compressor oil additive composition, and compressor oil. Background Art

[0002] With the development of compression technology, large compressor equipment is used in more and more scenarios, especially in industries such as oil refining and large ships. The accompanying high temperature, high pressure and highly corrosive environment have put forward higher challenges to the lubrication requirements of compressor equipment. Under high temperature and high pressure conditions and seawater corrosion environment, lubricating oil is very easy to deteriorate due to insufficient performance, and then generate carbon deposits, paint films, sludge, etc., and corrode the equipment to cause serious damage, affecting the normal operation of the equipment. Therefore, for compressor oil used to lubricate compressor equipment under high temperature, high pressure and highly corrosive environment, it is necessary to have excellent rust resistance, corrosion resistance, oxidation resistance, thermal stability, extreme pressure anti-wear, anti-emulsification and anti-foaming properties. On the other hand, traditional rust inhibitors, corrosion inhibitors (metal passivators), extreme pressure anti-wear agents and other additives are very likely to produce antagonistic effects, affecting the performance of compressor oil, and at the same time causing compressor oil instability and producing impurities such as precipitation.

[0003] Although the prior art can improve the above-mentioned properties of compressor oil to a certain extent, the degree of improvement is still limited, especially the rust resistance, corrosion resistance and oxidation resistance of compressor oil still have room for further improvement. Therefore, it is urgent to provide a compressor oil additive composition with more excellent rust resistance, corrosion resistance, oxidation resistance, thermal stability, extreme pressure anti-wear, anti-emulsification and anti-foaming properties, and solve the problem of precipitation caused by the antagonistic effect between additives. At present, there is no application of adding diionic liquid additive composition to compressor oil, nor is there any related report. Summary of the invention

[0004] An object of the present invention is to provide a compressor oil additive composition having excellent rust resistance, corrosion resistance and oxidation resistance.

[0005] Another object of the present invention is to provide a compressor oil, which is blended from the compressor oil additive composition and a mineral base oil or a synthetic base oil.

[0006] The technical solution adopted by the present invention is that the compressor oil additive composition includes the following components in 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% anti-foaming agent, and the balance is diluent, and the sum of the mass percentages of the above components is 100%.

[0007] The present invention is also characterized in that:

[0008] The antioxidant comprises, by mass percentage, 30-50% of amine antioxidant, 30-50% of phenolic antioxidant, and 20-40% of auxiliary antioxidant, and the sum of the mass percentages of the above components is 100%.

[0009] The amine antioxidant is at least one of octylbutyl diphenylamine, dioctyl diphenylamine, dinonyl diphenylamine, styrenated diphenylamine and N,N'-sec-butyl-p-phenylenediamine; the phenolic antioxidant has a structure of:

[0010]

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

[0012] The auxiliary antioxidants are pentaerythritol bis(diphosphite) and pentaerythritol tetrakis(3-laurylthiopropionate).

[0013] The extreme pressure anti-wear agent is at least one of triphenyl thiophosphate, butyl triphenyl 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 ester T903, 1# composite antifoaming agent T921, and 2# composite antifoaming agent T922; and the diluent is PCL150SN.

[0015] The structure of ionic liquid is:

[0016]

[0017] Wherein, n is a positive integer from 12 to 18.

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

[0019] The present invention is described in detail below in conjunction with specific implementation modes.

[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% anti-foaming agent, and the balance is diluent, and the sum of the mass percentages of the above components is 100%.

[0021] The antioxidants include, by mass percentage, 30-50% of amine antioxidants, 30-50% of phenolic antioxidants, and 20-40% of auxiliary antioxidants. The sum of the mass percentages of the above components is 100%. The three antioxidants are compounded in proportion to enable the lubricating oil to obtain more excellent antioxidant properties.

[0022] The amine antioxidant is at least one of octylbutyldiphenylamine, dioctyldiphenylamine, dinonyldiphenylamine, styrenated diphenylamine and N,N'-sec-butyl-p-phenylenediamine, which can significantly improve the antioxidant performance of the lubricating oil.

[0023] The structure of phenolic antioxidants is:

[0024]

[0025] Wherein, n is a positive integer of 12-18. The phenolic antioxidant of this structure has excellent antioxidant properties and can effectively complex metal ions to reduce carbon deposits, paint films and sludge formation. In addition, the volatility of the antioxidant is low, which further reduces the volatilization of the antioxidant at high temperatures.

[0026] The auxiliary antioxidants are pentaerythritol bis(diphosphite) and pentaerythritol tetra(3-laurylthiopropionate), and their structures are shown in the following formula. The performance of the two antioxidants is better than that of traditional thioester antioxidants, and their combination with amine and phenol antioxidants can significantly improve the thermal stability of lubricating oil.

[0027]

[0028]

[0029] The extreme pressure anti-wear agent is at least one of triphenyl thiophosphate, butyl triphenyl thiophosphate, dialkyl dithiophosphate and fatty phosphate amine salt, which can form a strong oil film on the metal surface, and has the effect of enhancing extreme pressure anti-wear and reducing friction coefficient.

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

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

[0032] The antifoaming agent is at least one of methyl silicone oil ester T903, 1# composite antifoaming agent T921, and 2# composite antifoaming agent T922, and is used to improve the antifoaming property of the lubricating oil.

[0033] The diluent is PCL150SN;

[0034] The structure of ionic liquid is:

[0035]

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

[0037] The diionic liquid is a composite system of diimidazole cations and diphosphate anions. The diionic liquid is used to prepare lubricating oil additives, which can improve the anti-rust and anti-corrosion properties of the lubricating oil additives, passivate metal activity, and improve the protection of lubricating oils to metals. At the same time, the diionic liquid has a synergistic effect with antioxidants, improves the oxidation resistance of lubricating oils, and reduces the formation of carbon deposits, paint films, and sludge. The C12-18 alkyl chain in the diionic liquid can increase the solubility, ensuring that it is dissolved in oil products under 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 specifically 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 specifically limit the order of adding the raw materials, the stirring rate, and the mixing temperature.

[0039] The compressor oil of the present invention is prepared 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 of this embodiment is shown in Table 1:

[0042] Table 1 Composition of compressor oil additive composition

[0043] name Usage% Diionic liquid (n=12) 5 Octylbutyldiphenylamine 15 Phenolic antioxidants (n=12) 15 Pentaerythritol bis(diphosphite) 15 Pentaerythritol tetrakis(3-laurylthiopropionate) 5 Triphenyl phosphorothioate 5 Dimethyl sebacate 8 DL32 1 T903 1 PCL150SN 30 total 100

[0044] Example 2

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

[0046] Table 2 Composition of compressor oil additive composition

[0047] name Usage% Diionic liquid (n=18) 30 Dinonyldiphenylamine 4 Phenolic antioxidants (n=18) 4 Pentaerythritol bis(diphosphite) 1 Pentaerythritol tetrakis(3-laurylthiopropionate) 1 Butyl triphenyl phosphorothioate 20 Dimethyl sebacate 2 LZ5957 5 T921 5 PCL150SN 28 total 100

[0048] Example 3

[0049] The composition of the compressor oil additive composition of 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 of 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 of this comparative example is shown in Table 5:

[0060] Table 5 Composition of compressor oil additive composition

[0061] name Usage% Diionic liquid (n=18) 35 Dinonyldiphenylamine 2 Phenolic antioxidants (n=18) 2 Pentaerythritol bis(diphosphite) 1 Pentaerythritol tetrakis(3-laurylthiopropionate) 1 Butyl triphenyl phosphorothioate 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 of this comparative example is shown in Table 6:

[0064] Table 6 Composition of compressor oil additive composition

[0065]

[0066]

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

[0068] Table 7 Performance test results of the composition of the embodiment and the comparative example after blending with the synthetic base oil

[0069]

[0070]

[0071] From the above results, it can be seen that the oil products prepared by using the compressor oil additive composition embodiments 1, 2, and 3 of the present invention: the liquid phase corrosion B method is qualified, and the anti-rust performance is excellent; the copper sheet corrosion is level 1a, and the corrosion resistance is excellent; the rotating oxygen bomb reaches more than 2200min, and the antioxidant performance is excellent; the total sediment weight is less than 5mg / 100mL, the copper rod and the steel rod have no weight loss and no discoloration, and the thermal stability is good; the FZG failure level is greater than level 10, and the extreme pressure and anti-wear performance are outstanding; at the same time, the anti-emulsification and anti-foaming properties are good. It meets the lubrication requirements of compressor equipment in high temperature, high pressure and strong corrosion environments in industries such as petroleum refining and large ships.

[0072] It can be seen from the above results that the oil products prepared by 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 diionic liquid.

[0073] In the present invention, a double ionic liquid composite system of a diimidazole cation and a diphosphate anion is used, which exhibits excellent rust resistance, corrosion resistance and oxidation resistance, can provide good protection for metals under high temperature, high pressure and strong corrosive environments, and reduce the formation of carbon deposits, paint films and sludge. In addition, the composition also has excellent thermal stability, extreme pressure wear resistance, anti-emulsification and anti-foaming properties, and meets the lubrication requirements of compressor equipment under high temperature, high pressure and strong corrosive environments in industries such as petroleum refining and large ships.

[0074] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims of the present invention.

Claims

1. A compressor oil additive composition, characterized in that: The composition 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% anti-foaming agent, and the balance is diluent. The sum of the mass percentages of the above components is 100%.

2. The compressor oil additive composition according to claim 1, characterized in that The antioxidant comprises, by mass percentage, 30-50% of amine antioxidant, 30-50% of phenolic antioxidant and 20-40% of auxiliary antioxidant, and the sum of the mass percentages of the above components is 100%.

3. The compressor oil additive composition according to claim 2, characterized in that The amine antioxidant is at least one of octylbutyl diphenylamine, dioctyl diphenylamine, dinonyl diphenylamine, styrenated diphenylamine and N,N'-sec-butyl-p-phenylenediamine; the phenolic antioxidant has a structure of: Wherein, n is a positive integer between 12 and 18; The auxiliary antioxidants are pentaerythritol bis(diphosphite) and pentaerythritol tetrakis(3-laurylthiopropionate).

4. 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, butyl triphenyl thiophosphate, dialkyl dithiophosphate and fatty phosphate amine salt; the light stabilizer is dimethyl sebacate.

5. 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 ester T903, 1# composite antifoaming agent T921, and 2# composite antifoaming agent T922; and the diluent is PCL150SN.

6. The compressor oil additive composition according to claim 1, characterized in that The ionic liquid structure is: Wherein, n is a positive integer from 12 to 18.

7. Compressor oil, characterized in that The compressor oil additive composition is blended with the compressor oil additive composition according to any one of claims 1 to 6 and a mineral base oil or a synthetic base oil.

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