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New hydrofluoro ether and its preparation method

A new technology of hydrofluoroether, which is applied in the field of new hydrofluoroether and its preparation, to achieve the effect of easy separation and purification, and increased yield

Inactive Publication Date: 2005-08-10
大连振邦氟涂料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, dimethylformamide DMF and dimethyl sulfoxide DMSO have not been used as solvents for the preparation of hydrofluoroethers

Method used

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  • New hydrofluoro ether and its preparation method
  • New hydrofluoro ether and its preparation method
  • New hydrofluoro ether and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

example I

[0033] Example I: Effect of Solvent

example I-1

[0035] Dissolve 11.2g (0.2mol) of potassium hydroxide in 50g (0.5mol) of trifluoroethanol, add 100 grams of DMF solvent, seal in a 500mL autoclave, cool at low temperature, and introduce 130 grams (1.58mol) of trifluoroethylene in vacuum , heated to 78°C, and reacted for 6.5 hours. 89.2 grams of crude product were obtained by distillation, with a yield of 94.8%.

example I-2

[0037] Dissolve 11.2g (0.2mol) of potassium hydroxide in 50g (0.5mol) of trifluoroethanol, add 100 grams of DMSO solvent, seal in a 500mL autoclave, cool at low temperature, and introduce 130 grams (1.58mol) of trifluoroethylene in vacuum , heated to 78°C, and reacted for 6.5 hours. 87.3 grams of crude product were obtained by distillation, with a yield of 92.8%.

[0038] In the comparison of example I-1 and I-2, the yield is slightly higher than that of DMSO with DMF as the solvent. At the same time, during the distillation and purification process, DMSO has a partial decomposition phenomenon, which increases the loss of solvent and affects the purity of the product.

[0039] Because trifluoroethylene is a geometrically asymmetric structure, two isomers are formed when it is added to alcohol:

[0040] Chromatographic analysis shows that: when DMF and DMSO are used as solvents for the reaction, the product obtained by the addition of trifluoroethylene and trifluoroetha...

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PUM

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Abstract

A process for preparing hydrofluoroether features the reaction between one of trifluoroethene, tetrafluoroethene, hexafluoro propene, etc and one of trifluoroethanol, trifluoropropanol, metanol, etc in organic solvent (DMF or DMSO). Its advantages are high output rate and easy purifying and separating.

Description

technical field [0001] The invention relates to a class of ether compounds containing fluorine, carbon, hydrogen and oxygen elements, in particular to a novel hydrofluoroether in a high-boiling organic solvent and a preparation method thereof. Background technique [0002] Hydrofluoroether (HFE, abbreviation for Hydrofluoroether) is a class of ether compounds containing fluorine, carbon, hydrogen, and oxygen elements. It is a new generation of substitutes for ozone depleting substances (ODS, abbreviation for Ozone Depleting Substance), and it does not destroy the ozone layer. , the greenhouse effect is small. New compounds that can be used in cleaning, refrigeration, foaming, medicine and other fields. [0003] The preparation of hydrofluoroethers can adopt a variety of process routes, mainly including (1) nucleophilic substitution reaction of fluorine-containing monohalogenated alkanes and fatty alcohols or fluorine-containing alcohols; (2) electrochemical fluorination of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/01C07C43/12
Inventor 滕刚李同信刘非李娜蒋博
Owner 大连振邦氟涂料股份有限公司
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