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New oxahydrofluoroether compounds and preparation method and application of new oxahydrofluoroether compounds

A technology of compound and hydrofluoroether, applied in the field of novel oxahydrofluoroether compound and its preparation and application

Active Publication Date: 2018-08-31
SANMING HEXAFLUO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: in view of the increasing demand for environmentally friendly compounds, especially compounds with zero ozone depletion potential and / or low global warming tendency, the novel oxahydrofluoroethers of the present invention , the only halogen element containing fluorine, does not contain ozone-depleting substances, and is an environmentally friendly non-flammable solvent and cleaning agent

Method used

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  • New oxahydrofluoroether compounds and preparation method and application of new oxahydrofluoroether compounds
  • New oxahydrofluoroether compounds and preparation method and application of new oxahydrofluoroether compounds
  • New oxahydrofluoroether compounds and preparation method and application of new oxahydrofluoroether compounds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] CF 3 OCF 2 OCF 2 CF 2 OCH 3 Preparation of:

[0101] 2moLCF 3 OCF 2 OCF 2 COF, 2.1moL anhydrous diglyme, 2.4moL potassium fluoride, 0.0072moL phase transfer catalyst tetrabutylammonium chloride, and 2moL dimethyl sulfate were added to a 2L autoclave, and the While stirring at a rotating speed, the temperature was raised to 52°C, and the reaction was carried out at 52°C for 24 hours. After 24 hours of reaction, 200 g of potassium hydroxide aqueous solution with a mass fraction of 50% was added, the temperature was raised to 55°C, and the temperature was kept at 55°C for 45 minutes, and then used A separatory funnel is used for liquid separation, and the liquid in the lower layer is rectified to obtain the target product. The resulting target product was distilled (b.p.=76°C) to obtain the product CF with a purity of 99.5% and a yield of 96.4%. 3 OCF 2 OCF 2 CF 2 OCH 3 .

Embodiment 2

[0103] CF 3 OCF 2 OCF 2 CF 2 OCF 2 CF 2 OCH 3 Preparation of:

[0104] Add 0.516mol potassium fluoride, 0.45mol tetraethylene glycol dimethyl ether to a 2L autoclave, and then add 2.0mol CF 3 OCF 2 OCF 2 COF, reduce the inner temperature of the autoclave to 0°C through a dry ice trap, and then feed 2.0mol hexafluoropropylene oxide at a flow rate of 0.5g / min. After the feeding is completed, continue to stir at a speed of 200 rpm for 30 minutes Addition reaction is carried out, and the crude product is obtained by rectification CF 3 OCF 2 OCF 2 CF 2 OCF (CF 3 ) COF. After gas chromatography analysis, the product CF 3 OCF 2 OCF 2 CF 2 OCF (CF 3 ) The content of COF is 78%.

[0105] 1.0molCF 3 OCF 2 OCF 2 CF 2 OCF (CF 3 ) COF was dropped into a three-necked flask equipped with 1.2 mol of anhydrous sodium carbonate and 1.80 mol of diethylene glycol dimethyl ether with a reflux condenser, and the inner temperature of the reaction was maintained at 50° C. for...

Embodiment 3

[0116] CF 3 OCF 2 OCF 2 CF 2 OCH 3Preparation of:

[0117] 2moLCF 3 OCF 2 OCF 2 COF, 2.1moL anhydrous diglyme, 2.4moL potassium fluoride, 0.0075moL phase transfer catalyst, and 2moL dimethyl sulfate were added to a 2L autoclave, and the temperature was raised to 52 while stirring at a speed of 300 rpm. ℃, keep it warm at 52°C for 24 hours to react, after 24 hours of reaction, add 200g of potassium hydroxide aqueous solution with a mass fraction of 50%, raise the temperature to 55°C, keep it warm at 55°C for 45 minutes, and then use a separatory funnel to separate the liquid , the lower liquid was subjected to rectification to obtain the target product. The resulting target product was distilled (b.p.=76°C) to obtain the product CF with a purity of 99.1% and a yield of 97.1%. 3 OCF 2 OCF 2 CF 2 OCH 3 . The phase transfer catalyst is a mixture of tetrabutylammonium fluoride and tetrabutylammonium chloride in a molar ratio of 1:1.

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Abstract

This invention relates to oxahydrofluoroether compounds and a preparation method and application of the new oxahydrofluoroether compounds. The oxahydrofluoroether compounds are compounds represented by a general formula of CF3O(CF2O)mCF2CF2R, wherein R is OR1 or (OCF(CF3)CF2)nOR2 or OCF2CF2OR3, and R1, R2 and R3 are linear-chain or branched-chain C1-C3 alkyl groups. The designed new oxahydrofluoroether compounds have a structure with high content of the oxygen element, extremely low surface tension and stronger permeability than those of other hydrofluoroether solvents, and can be applied to cleaning agents so as to ensure thorough cleaning; meanwhile, due to high content of oxygen and a short atmospheric lifetime, the hydrofluoroether compounds can be easily degraded to CO2 and fluoride salts, and have a low GWP value which is the greenhouse effect potential value; the oxahydrofluoroether compounds have good application in anti-fingerprint liquid diluents, dilution of a fluorine-containing treating agent, removal of contaminants in equipment components, preparation of foamed plastics, welding in a vapor phase, transfer of heat, deposition of coatings on substrates and cutting or grinding aspects.

Description

technical field [0001] The present invention specifically relates to an oxahydrofluoroether compound and its preparation method and application. Background technique [0002] Chlorofluorocarbons are hydrocarbon chemicals containing chlorine and fluorine elements, which are very stable on the earth's surface, but when they are irradiated by ultraviolet rays at an altitude of 15 to 50 kilometers above the earth's surface, new chlorofluorocarbons will be formed Substances and chlorine atoms (chlorine radicals), chlorine atoms can produce a series of reactions that destroy as many as thousands to hundreds of thousands of ozone molecules without being damaged themselves. In this way, the ozone in the ozone layer is consumed more and more, the ozone layer becomes thinner and thinner, and even a hole in the ozone layer appears in some areas. [0003] The large release of chlorofluorocarbons has led to increasingly serious damage to the ozone layer. The participating countries of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C43/12C07C41/30C11D7/50C09K5/04C10M105/54C09D5/16C09D7/20C09D5/00C08J9/14B23K35/00B23Q11/00C10N40/22C10N40/24
CPCB23K35/00B23Q11/00C07C41/30C07C43/126C08J9/143C08J2203/146C09D5/00C09D5/1625C09K5/04C10M105/54C10N2040/22C10N2040/24C11D7/5018C09D7/20
Inventor 吴成英王孟英邹灿陈文权沈富冰谢伟东吕涛张威
Owner SANMING HEXAFLUO CHEM CO LTD
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