Method for improving inoxidizability of cuprammonia-containing ammonia compressor oil

A compressor oil and anti-oxidation technology, which is applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of short service life and poor anti-oxidation performance of oil products, and achieve excellent viscosity-temperature properties and excellent oxidation stability Effect

Inactive Publication Date: 2013-04-10
CHINA PETROLEUM & CHEM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The technical problem to be solved by the present invention is that in the prior art, when there is cuproammonia liquid mixed with ammonia gas, the oil composition of the screw type am

Method used

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  • Method for improving inoxidizability of cuprammonia-containing ammonia compressor oil
  • Method for improving inoxidizability of cuprammonia-containing ammonia compressor oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7

[0019] According to the parts by weight in Table 1, take the required amount of antioxidants, extreme pressure antiwear agents, metal passivators, rust inhibitors, antifoaming agents and pour point depressants respectively and add them to the base oil. ℃, heated and stirred until completely uniform to obtain the screw ammonia compressor oil composition. The type and amount of each component in the composition are specifically shown in Table 1.

[0020] Among them, T511 is 4,4-methylene bis(2,6-di-tert-butylphenol), T512 is 3,5-di-tert-butyl-4-hydroxyphenyl acrylate, and L-57 is alkylated Diphenylamine, T531 is phenyl-α-naphthylamine, T803B is polyalphaolefin, T602 is polyacrylate. The extreme pressure antiwear agent is tricresyl phosphate, the metal passivator is N, N-dialkylaminomethylene benzenetriazole, the rust inhibitor is basic dinonyl naphthalene sulfonate barium, and the antifoaming agent is It is a copolymer of acrylate and ether.

Embodiment 2

[0022] The antioxidant test of the compositions of [Examples 1-7]. The test conditions are: 100 ml of test oil and cuproammonia solution, the test temperature is 50°C, the compressed air with a gauge pressure of 19.6kPa is introduced, the mixture of test oil and cuproammonia solution is stirred, and the pressure and temperature are maintained for 6 hours. The test results are shown in Table 2.

[0023] Other properties of the test oil, viscosity-temperature, anti-foam, oil-water separation, extreme-pressure anti-wear and anti-rust and anti-corrosion properties, were not affected.

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Abstract

The invention relates to a method for improving the inoxidizability of cuprammonia-containing ammonia compressor oil, and mainly solves the problems of the prior art that under the condition that cuprammonia is mixed with ammonia gas, the inoxidizability of a screw type ammonia compressor oil composite is poor, and the service life of an oil product is short. The method disclosed by the invention has the technical scheme that the ammonia compressor oil and cuprammonia mixed liquor are fully contacted for 1-10 hours under the conditions that the temperature is 40-60 DEG C and the gage pressure is 10-30MPa; the weight ratio of the ammonia compressor oil to the cuprammonia is 1-3, wherein the ammonia compressor oil comprises the following components in parts by weight: 100 parts of mineral base oil and 0.01-2 parts of antioxygen, and the antioxygen consists of phenolic antioxidant and amine antioxidant; and the phenolic antioxidant is selected from at least one of 4,4-methylenebis (2,6-di-tert-butyl phenol), 3,5-di-tert-butyl-4-hydroxy phenylacrylic acid and pentaerythritol tetrakis[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and the amine antioxidant is selected from at least one of phenyl-alpha-naphthylamine, alkylate phenyl-alpha-naphthylamine, octyl butyl diphenylamine and alkylated diphenylamine, so that the problem is better solved. The method can be used in the industrial production for improving the inoxidizability of the cuprammonia-containing ammonia compressor oil.

Description

technical field [0001] The invention relates to a method for improving the oxidation resistance of ammonia compressor oil containing copper ammonia liquid. Background technique [0002] Ammonia compressor is a device for conveying and increasing pressure during the production, storage and use of ammonia gas. Among them, screw ammonia compressor has simple structure, few wearing parts, long inspection period, high volumetric efficiency and low exhaust temperature. , It is not sensitive to liquid shock, and has been widely used. [0003] The main function of the screw ammonia compressor oil is three aspects: one is to absorb a large amount of compression heat generated by the compression of the gas, to cool the surface of the compressed air and related moving friction parts, so that the exhaust temperature will not be too high, It will not cause abnormal wear due to different thermal expansion coefficients; the second is to form an oil film on the friction surface of the roto...

Claims

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Application Information

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IPC IPC(8): C10M141/06C10M141/10C10M141/08C10M161/00C10N30/06C10N30/10C10N30/12
Inventor 周霞施东学潘健益梅蓉何晓瑛孔吉霞
Owner CHINA PETROLEUM & CHEM CORP
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