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Freezer oil for r32 refrigerant and composition comprising same

A technology of refrigerating machine oil, R32, applied in lubricating compositions, additives, petroleum industry, etc., can solve problems such as use restrictions

Active Publication Date: 2018-10-23
NOF CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, they are subject to regulations aimed at reducing the greenhouse effect and their use is restricted

Method used

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  • Freezer oil for r32 refrigerant and composition comprising same
  • Freezer oil for r32 refrigerant and composition comprising same
  • Freezer oil for r32 refrigerant and composition comprising same

Examples

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Embodiment

[0133] Hereinafter, the present invention is explained in more detail by showing Examples and Comparative Examples; however, the scope of the present invention is not limited by the following Examples.

[0134] [Synthesis of citrate triester (component (A)) and other esters]

manufacture Embodiment 1

[0136] Citric anhydride (282g, 1.47mol), 1-butanol (294g, 3.97mol), and 2-ethyl-1-hexanol (114g, 0.87mol) were injected into a four-necked flask, under a nitrogen atmosphere, at 200 The reaction was carried out at normal pressure for 5 hours at °C while distilling off the reaction water. Thereafter, the reaction was continued at 200° C. until the acid value reached not more than 2 mgKOH / g. Next, the excess alcohol was distilled off at 200°C under reduced pressure of 1-5 kPa to give the crude ester. Cool the crude ester, add acid clay and an adsorbent based on silica-alumina respectively at 1.0% by mass of the theoretically obtained ester, and perform adsorption treatment (adsorption treatment temperature: 100°C, pressure: 1-5kPa, adsorption Processing time: 2 hours). Finally, the mixture was filtered through a 1-micron filter to give the target citrate triester (acid value not more than 0.1 mgKOH / g) (hereinafter referred to as "ester A1").

manufacture Embodiment 2

[0138] Citric anhydride (295g, 1.53mol), 1-butanol (326g, 4.40mol), and 1-octanol (86g, 0.66mol) were injected into a four-necked flask, and evaporated at 200°C under a nitrogen atmosphere. The reaction was carried out under normal pressure for 5 hours while reacting water. Subsequent steps were carried out in the same manner as in Production Example 1 to give the target citrate triester (hereinafter referred to as "ester A2").

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Abstract

The present invention provides a freezer oil for R32 refrigerant that comprises (A) a citrate triester prepared from citric acid and a C2 to C10 aliphatic monohydric alcohol.

Description

technical field [0001] The present invention relates to a refrigerating machine oil for R32 refrigerant excellent in the performance of dissolving additives (additive dissolution characteristics) and a composition containing the same. Background technique [0002] Conventionally, chlorine-containing chlorofluorocarbon refrigerants have been used in air conditioners such as room air conditioners, cabinet air conditioners, etc., household refrigerator freezers, industrial refrigeration machines, and air conditioners for automobiles such as hybrid vehicles, electric vehicles, etc. . In recent years, instead of these chlorinated refrigerants that cause the destruction of the ozone layer, etc., hydrofluorocarbon (HFC) refrigerants such as R134a refrigerant (1,1,1,2-tetrafluoroethane), R125 refrigerant ( Pentafluoroethane), R410A refrigerant (mixed refrigerant of R32 refrigerant (difluoromethane) and R125 refrigerant (pentafluoroethane)), etc. These HFC refrigerants have a high ...

Claims

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Application Information

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IPC IPC(8): C10M105/36C10N40/30C10M107/24C10M129/76C10N20/00C10N30/00C10M137/04C10M105/32C10M111/04C10M169/04C09K5/04C10M105/34
CPCC10M105/36C10M171/008C10M2207/281C10M2207/2825C10M2207/289C10M2209/04C10M2223/041C10N2040/30C09K5/04C10N2020/011C10N2020/101C10N2030/70C10M105/34C10M107/24C10M111/04C10M129/76C10M137/04C10M169/04
Inventor 吉川文隆加治木武上田成大山田宗宏
Owner NOF CORP
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