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Lubricant for tetrafluoroethane refrigerant

A tetrafluoroethane and refrigerant technology, which is used in lubricating compositions, additives, petroleum industry, etc., can solve the problems of increasing acid value, poor heat resistance and anti-aging properties, and poor reproducibility of chemical composition, and achieve stable Reproducibility, stable overall performance, good miscibility and cooling effect

Inactive Publication Date: 2005-02-23
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the aliphatic chain structure, this ester-type lubricating oil has poor heat resistance and anti-aging performance, especially it is easy to pyrolyze and hydrolyze to increase the acid value
In addition to using several polyols and several fatty acid mixtures in the esterification reaction process, the linear carboxylic acid and the branched carboxylic acid have a great difference in the reaction speed due to the size of the steric hindrance. Compositional reproducibility is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] 1. Refer to the following mass percentage composition for implementation:

[0024] 1,3,5-Tris(ethylhexanoate)isocyanurate 22.5

[0025] 1,3,5-Tris(ethyl isooctanoate)isocyanurate 27.5

[0026] 2,2-Dimethyl-1,3-propanediol diisooctanoate 50.0

[0027] 1.1, the preparation of 1,3,5-tris (ethyl hexanoate) isocyanurate

[0028] In a 3L four-necked round-bottomed flask equipped with mechanical stirring, thermometer, oil-water separation device and reflux condenser, put 522g (2mol) of 1,3,5-trihydroxyethyl isocyanurate, 800ml of decalin , 3g p-toluenesulfonic acid, 836g (7.2mol) n-hexanoic acid, heated, began to reflux at 170 ° C, with the continuous separation of water, the temperature continued to rise, up to 210 ° C, when the water output reached the theoretical amount, almost no longer Water was generated, the reaction was stopped, cooled to room temperature, washed with 200 ml of water, and the separated oil phase was concentrated to remove decalin and unreacted n-hex...

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PUM

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Abstract

This invention, a kind of lube for tetrafluoroethane refrigerant, relates to lubricant. It solves problems about weak heat resistance, short-time ageing resistance, and hard rerrence of chemial components. It adopts isocyanurate's heterocyclic carbon-nitrogen unit which has strong heat resistance and good ageing resistance. It also adopts single acid and polyol to react to produce three kinds of clear structure liquid compound, the weight percent of which is: 18-27% diethyl adipate, 22-33% isooctanoic adipate, 40-60% 2,2-dimethyel-1,3-propanediol. In short, the invention mainly used as refrigerant.

Description

technical field [0001] The invention is a lubricating oil for tetrafluoroethane refrigerant, which belongs to the lubricant and is mainly used for refrigerants and the like. Background technique [0002] The refrigerants used in the past were HCFC-type CFC compounds, which had a damaging effect on the ozone layer of the earth. Therefore, developing countries will completely ban and use such refrigerants from January 1, 2006. The tetrafluoroethane refrigerant is currently recognized as the best substitute for CFC. However, due to its greater polarity than the former, it is physically immiscible with conventional petroleum-based lubricants. [0003] At present, domestic and foreign refrigeration lubricating oils are all selected ester lubricating oils, instead of petroleum-based lubricating oils, to solve the miscibility. But these ester lubricating oils are all prepared with aliphatic polyols, such as neopentyl glycol, trimethylolpropane, pentaerythritol, etc. U.S. Patent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M133/20
Inventor 甘孝贤丘少君卢先明张志刚王光碧胡中波张殿红邢颖
Owner XIAN MODERN CHEM RES INST
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