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Refrigerator oil composition

A refrigeration oil and composition technology, applied in lubricating compositions, petroleum industry, additives, etc., to achieve the effect of prolonging the oxidation induction period and excellent oxidation stability

Inactive Publication Date: 2010-10-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For using (3,5-dialkyl-4-hydroxyl phenyl) phenylsulfanyl alkyl ester as refrigerating machine oil antioxidant, there is no literature report at home and abroad

Method used

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  • Refrigerator oil composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Put 0.2mol (30.8g) of phenylthioethanol and 0.24mol (70.08g) of (3,5-di-tert-butyl-4-hydroxyphenyl) methyl propionate into a 250ml three-necked reaction flask, add 0.4gLiOH Catalyst, stirring, heating. The pressure was reduced to 0.02Mpa, the temperature was 120°C, and the reaction was carried out for 3 hours. A viscous substance was obtained, light brown in color. The temperature was raised to 260°C, and unreacted raw materials were removed by distillation under reduced pressure. A brown-red transparent viscous liquid was obtained. The product conversion was 83.6%.

Embodiment 2

[0036] Put 0.2mol (30.8g) of phenylthioethanol and 0.24mol (70.08g) of (3,5-di-tert-butyl-4-hydroxyphenyl) methyl propionate into a 250ml three-necked reaction flask, add 0.8gLiOH Catalyst, stirring, heating. The pressure was reduced to 0.085Mpa, the temperature was 180°C, and the reaction was carried out for 5 hours. A viscous substance was obtained, light brown in color. The temperature was raised to 260°C, and unreacted raw materials were removed by distillation under reduced pressure. A brown-red transparent viscous liquid was obtained. Product conversion was 95.1%.

Embodiment 3

[0038] Put 0.2mol (30.8g) of phenylthioethanol and 0.24mol (70.08g) of (3,5-di-tert-butyl-4-hydroxyphenyl) methyl propionate into a 250ml three-necked reaction flask, and add 1g of LiOH catalyst , stir and heat. The pressure was reduced to 0.005Mpa, the temperature was 160°C, and the reaction was carried out for 8 hours. A viscous substance was obtained, light brown in color. The temperature was raised to 260°C, and unreacted raw materials were removed by distillation under reduced pressure. A brown-red transparent viscous liquid was obtained. Product conversion was 95.7%.

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Abstract

The invention relates to a refrigerator oil composition, which comprises polyol ester, (3,5-dialkyl-4-hydroxyphenyl) carboxylic thiophenyl alkyl ester, an antiwear agent, a metal passivator and an acid catching agent, wherein the polyol ester is pentaerythritol tetranitrate generated by reacting pentaerythritol with a mixture of isononanoic acid and diethyl caproic acid. The refrigerator oil composition provided by the invention has excellent oxidation stability. Compared with that of the refrigerator oil using the conventional antioxidant, the oxidative induction time of the refrigerator oil composition is obviously prolonged.

Description

technical field [0001] The present invention relates to a refrigerating machine oil composition. Background technique [0002] The widely used chlorofluorocarbons and hydrochlorofluorocarbons in the past have good chemical stability, and they are not easy to decompose in the troposphere when they leak into the air. Chlorine radicals, which are involved in the depletion of ozone and cause damage to the ozone layer in the atmosphere, are currently being replaced by chlorine-free hydrofluorocarbons (HFCs) refrigerants. [0003] Synthetic ester (POE) has good mutual solubility, stability and material compatibility, reliable lubricating performance, safety and environmental protection, and has become the preferred lubricating oil for hydrofluorocarbons (HFCs). [0004] Different from general lubricating oil, refrigeration oil and refrigerant continuously circulate between the outlet of the compressor in the high-temperature area and the evaporator in the low-temperature area. It...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M135/06C10M141/08C10N40/30
Inventor 陈晓伟梁宇翔贺景坚邹玉华阎欢尹开吉
Owner CHINA PETROLEUM & CHEM CORP
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