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Refrigerating machine oil

A technology for refrigerating machine oil and fatty acid, applied in the direction of lubricating composition, etc., can solve problems such as obstruction and poor compatibility, and achieve the effect of good compatibility and high compatibility

Active Publication Date: 2014-10-08
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] R134a refrigerant is generally used in refrigeration compressors with high refrigeration depth, such as refrigeration compressors in refrigerators. The refrigeration temperature of refrigerators is generally -29°C or even lower; considering the lubricating performance at low temperatures, reducing friction and improving refrigeration compression Due to factors such as machine life and other factors, high-viscosity POE-type refrigeration oil is required for refrigeration compressors with high refrigeration depth; however, high-viscosity POE-type refrigeration oil has poor compatibility with R134a refrigerant at low temperatures, which hinders its application. In refrigeration compressors with high refrigeration depth

Method used

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Experimental program
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Effect test

preparation example Construction

[0056] The preparation method of refrigerating machine oil provided by the invention is preferably:

[0057] The antioxidant, anticorrosion agent, antiwear agent, defoamer and polyol ester described in the above technical scheme are mixed to obtain the refrigerating machine oil.

[0058] The method of mixing the antioxidant, anti-corrosion agent, anti-wear agent, defoamer and polyol ester is not particularly limited in the present invention, and a mixing technical solution well known to those skilled in the art can be adopted. In the present invention, the consumption of described antioxidant, anticorrosion agent, antiwear agent, defoamer and polyol ester is the same as that of antioxidant, anticorrosion agent, antiwear agent, defoamer and polyol described in above-mentioned technical scheme The amount of ester is the same, and will not be repeated here.

[0059] In the present invention, the mixture of antioxidant, anticorrosion agent, antiwear agent, defoamer and polyol est...

Embodiment 1

[0066] 57.12g of monopentaerythritol, 71.12g of dipentaerythritol, valeric acid of 118.39g, heptanoic acid of 116.70g and nonanoic acid of 269.03g are added in the three-necked flask and mixed, and 25.29g of mass percentage concentration is 10% of After the sulfuric acid aqueous solution is stirred, the first heating is carried out for 5 hours under a vacuum of -0.07MPa, so that the temperature of the reaction system reaches 180°C to carry out the esterification reaction, and the esterification reaction product is obtained;

[0067] The above-mentioned esterification reaction product is subjected to a second heating for 4 hours under a vacuum of -0.08MPa, so that the temperature of the reaction system reaches 220°C to continue the esterification reaction;

[0068] After the esterification reaction is completed, the obtained reaction solution is evacuated to -0.093MPa for deacidification treatment, and the deacidification-treated reaction solution is filtered to obtain crude pol...

Embodiment 2

[0073] 147.68g of monopentaerythritol, 124.02g of 3-methylbutyric acid, 122.26g of 2-ethylpentanoic acid and 281.85g of 3,5,5-trimethylhexanoic acid were added to the three-necked flask and mixed, and the obtained After adding 51.24g of sulfuric acid aqueous solution with a mass percentage concentration of 5% in the mixture and stirring, the first heating was carried out for 3 hours under a vacuum of -0.05MPa, so that the temperature of the reaction system reached 170°C to carry out the esterification reaction, and the esterification reaction product was obtained ;

[0074] The above-mentioned esterification reaction product is subjected to the second heating for 2 hours under a vacuum of -0.06MPa, so that the temperature of the reaction system reaches 210°C to continue the esterification reaction;

[0075] After the esterification reaction, vacuumize the obtained reaction solution to -0.09MPa for deacidification treatment, filter the deacidification-treated reaction solution ...

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Abstract

The invention provides refrigerating machine oil which comprises the following raw materials: 0.05wt%-0.1wt% of an antioxidant, 0.01wt%-0.05wt% of an anticorrosion agent, 1wt%-5wt% of an anti-wear agent, 0.0001wt%-0.005wt% of a defoaming agent and the balance of polyol ester, wherein polyol ester is obtained by esterification reaction of fatty acid and polyol; the polyol comprises one or two of pentaerythritol and dipentaerythritol. According to the refrigerating machine oil provided by the invention, polyol ester is adopted as base oil and is relatively high in viscosity and relatively good in compatibility with a refrigerant R134a at low temperature, so that the refrigerating machine oil is relatively high in viscosity and relatively good in compatibility with the refrigerant R134a at low temperature.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a refrigerator oil. Background technique [0002] The refrigerating machine oil is applied to the parts of the refrigerating machine that need to be lubricated, and has the following functions: Lubricate the friction surface, so that the friction surface is completely separated by the oil film, thereby reducing the friction work, friction heat and wear; the flow of the refrigerating machine oil takes away the friction heat, so that The temperature of the friction parts is kept within the allowable range; the sealing part is filled with refrigerating machine oil, which can ensure the sealing performance and prevent the leakage of refrigerant; the movement of the refrigerating machine oil takes away the wear debris generated by metal friction, and plays the role of cleaning the friction surface; The oil also provides hydraulic power to the unloading mechanism. The above-ment...

Claims

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Application Information

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IPC IPC(8): C10M169/04
Inventor 熊瑶赵玉贞金承华
Owner CHINA PETROLEUM & CHEM CORP
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