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Method for synthesis of pentafluoropropionyl fluoride

A technology of pentafluoropropionyl fluoride and hexafluoropropylene oxide, which is applied in the field of synthesis of pentafluoropropionyl fluoride, and can solve problems such as unfavorable large-scale preparation of pentafluoropropionyl fluoride, difficulty in obtaining raw materials, and difficulties in industrial production

Inactive Publication Date: 2013-06-12
SINOCHEM LANTIAN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] U.S. Patent No. 5,259,938 describes the synthesis of pentafluoropropionyl fluoride by using tetrafluoroethylene as a raw material and fluorophosgene modulation polymerization, and the product yield reaches 68%. This technical route also has the disadvantages that the raw material is not easy to obtain, and the product yield is low, which is not conducive to large-scale production. Disadvantages of pentafluoropropionyl fluoride
[0014] In the above-mentioned pentafluoropropionyl fluoride synthetic method, there are the shortcomings of low product yield and difficulty in industrialized production, and it is necessary to find a high-yield pentafluoropropionyl fluoride synthetic method

Method used

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  • Method for synthesis of pentafluoropropionyl fluoride
  • Method for synthesis of pentafluoropropionyl fluoride
  • Method for synthesis of pentafluoropropionyl fluoride

Examples

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Embodiment 1

[0031] Add 150g of ethylenediamine and 10g of NaF to a pressure reactor with a volume of 0.5L, lined with polytetrafluoroethylene, and a stirrer, then close the reactor, start stirring the reaction, the stirring speed is 300 rpm, and turn on the heating Raise the temperature of the reactor, and control the temperature at 90°C. After the temperature reaches, 200g of raw material hexafluoropropylene oxide is fed into the reactor in batches from the liquid phase tube, and the reaction pressure is maintained at 0.6MPa, and the reaction material is released from the gas phase tube. , condensed and collected to obtain crude product material 175g, gas phase analysis crude product content, wherein CF 3 CF 2 The COF content is 92%, and the product yield is 80.5%.

Embodiment 2

[0033] In a pressure reactor with a volume of 0.5L, lined with polytetrafluoroethylene, and a stirrer, add 180g quinoline and 10gKF, then close the reactor, start stirring the reaction, the stirring speed is 300 rpm, open the reactor Heating to increase the temperature of the reactor, the temperature is controlled at 100°C, after the temperature reaches, 200g of raw material hexafluoropropylene oxide is passed into the reactor in batches from the liquid phase tube, the reaction pressure is maintained at 0.65MPa, and the reaction material is discharged from the gas phase tube Emit, condense and collect to obtain crude product material 186g, gas phase analysis crude product content, wherein CF 3 CF 2 The COF content is 91%, and the product yield is 84.6%.

Embodiment 3

[0035]In a pressure reactor with a volume of 0.5L, lined with polytetrafluoroethylene, and a stirrer, add 160g of piperidine and 6g of CsF, then close the reactor, start stirring the reaction, the stirring speed is 300 rpm, open the reactor Heating to increase the temperature of the reactor, the temperature is controlled at 90°C. After the temperature reaches, 210g of raw material hexafluoropropylene oxide is fed into the reactor in batches from the liquid phase tube, and the reaction pressure is maintained at about 0.5MPa. The material is released, condensed and collected to obtain 181g of the crude material, and the crude product content is analyzed by gas phase, wherein CF 3 CF 2 The COF content is 93.5%, and the product yield is 81%.

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Abstract

The invention discloses a method for synthesis of pentafluoropropionyl fluoride by using hexafluoropropylene oxide as a raw materisl. Under the effect of a catalyst, hexafluoropropylene oxide is subjected to isomerization reaction to synthesize pentafluoropropionyl fluoride. The catalyst comprises a main catalyst and a co-catalyst, wherein the main catalyst is organic amine compounds, five-or six-membered nitrogen-containing heterocycles or six-membered fused ring aromatic compounds; the co-catalyst is an alkali metal fluoride; and the quality ratio of the main catalyst to the co-catalyst is 100:1 to 5:1. The method provided by the invention has the advantages of mild preparation process, simple operations and high yield of synthesized pentafluoropropionyl fluoride. The prepared pentafluoropropionyl fluoride is suitable for preparing fluorine alkyl group-containing vinyl ethers and perfluoro-propionyl peroxides.

Description

technical field [0001] The invention relates to a method for synthesizing pentafluoropropionyl fluoride, in particular to a method for synthesizing pentafluoropropionyl fluoride by using hexafluoropropylene oxide as a raw material. Background technique [0002] Pentafluoropropionyl Fluoride, molecular formula: CF 3 CF 2 COF; Cas number: 422-61-7; Molecular weight: 166.02; Boiling point: -28°C; It is a colorless gas at room temperature, acidic, easy to undergo esterification reaction with alcohol, and generates HF gas and perfluoropropionic acid when it meets water. [0003] As the raw material and intermediate of special fluorine-containing functional materials, pentafluoropropionyl fluoride is a very important compound. For example, a series of fluorine-containing alkyl vinyl ethers can be prepared. This compound is a modified monomer for fluorine-containing elastomers. It can effectively destroy the crystallinity of the copolymer, and the C-O bond in the molecule endows ...

Claims

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Application Information

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IPC IPC(8): C07C53/50C07C51/58
CPCC07C53/50C07C51/58
Inventor 韩国庆徐卫国盛楠陈明炎方小青肖恒侨项文勤
Owner SINOCHEM LANTIAN
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