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Preparation method of high-purity perfluoromethylvinyl ether

A perfluoromethyl vinyl ether, high-purity technology, used in ether preparation, ether separation/purification, organic chemistry, etc., can solve the problems of inability to apply industrial production, low organic solvent yield, low purity, etc. Operation, cheap raw materials, high purity effect

Active Publication Date: 2019-07-02
CHINA BLUESTAR CHENGRAND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In summary, the perfluoromethyl vinyl ether prepared by the prior art has a purity of up to 99.8%. At the same time, gas-liquid chromatography can only be used as a laboratory method and cannot be applied to industrial production. Absorption also has the problems of low yield and low purity
In addition, there are many types of impurities in the crude product of perfluoromethyl vinyl ether, and the content is relatively large. Some impurities can form azeotropes with perfluoromethyl vinyl ether and have similar properties, so they cannot be obtained by conventional methods such as rectification. Purity perfluoromethyl vinyl ether

Method used

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  • Preparation method of high-purity perfluoromethylvinyl ether

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Embodiment 1

[0032] A preparation method of high-purity perfluoromethyl vinyl ether, comprising the following processing steps:

[0033] A. The perfluoromethyl vinyl ether crude product is rectified at a temperature of -30°C and a pressure of 0.05 MPa;

[0034] B. Contact the perfluoromethyl vinyl ether rectification product obtained by rectification with an adsorbent, control the adsorption temperature to -20°C, and the adsorption pressure to 0.01MPa, and collect high-purity perfluoromethyl vinyl ether products.

Embodiment 2

[0036] A preparation method of high-purity perfluoromethyl vinyl ether, comprising the following processing steps:

[0037] A, at a temperature of 80°C and a pressure of 1.5MPa, the crude product of perfluoromethyl vinyl ether is rectified;

[0038] B. Contact the rectification product of perfluoromethyl vinyl ether obtained by rectification with an adsorbent, control the adsorption temperature to 100° C., and the adsorption pressure to 1.0 MPa, and collect high-purity perfluoromethyl vinyl ether products.

Embodiment 3

[0040] A preparation method of high-purity perfluoromethyl vinyl ether, comprising the following processing steps:

[0041] A, at a temperature of 25°C and a pressure of 0.78MPa, the crude product of perfluoromethyl vinyl ether is rectified;

[0042]B. Contact the rectification product of perfluoromethyl vinyl ether obtained by rectification with an adsorbent, control the adsorption temperature to 40° C., and the adsorption pressure to 0.5 MPa, and collect high-purity perfluoromethyl vinyl ether products.

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Abstract

The invention relates to a preparation method of high-purity perfluoromethylvinyl ether, and belongs to the technical field of organic fluorine monomers. According to the method, the perfluoromethylvinyl ether crude product is treated by adopting two steps of pressurized rectification and adsorbent adsorption, and a high-purity perfluoromethylvinyl ether product is prepared. The method disclosed by the invention is simple in process, can be used for continuous production, and has the characteristics of convenient operation and high yield, high-purity (99.9% or more) perfluoromethylvinyl ethercan be obtained, and the preparation method is very suitable for industrial production.

Description

technical field [0001] The invention relates to a method for preparing perfluoromethyl vinyl ether, more specifically, the invention relates to a method for preparing high-purity perfluoromethyl vinyl ether, which belongs to the technical field of organic fluorine monomers. Background technique [0002] Perfluoromethyl vinyl ether (English name perfluoromethyl vinyl ether, molecular formula CF 3 OCF=CF 2 ), is a perfluoroalkene ether special monomer that has developed rapidly in recent years, and is also the most important modified monomer for fluoropolymers. It is of incomparable importance in the synthesis of high-performance fluororubbers and fluororesins. As a comonomer, the purity of perfluoromethyl vinyl ether has a crucial impact on the performance of the final product. Fluorine-containing materials used in high-end fields, especially optics, electronic devices, semiconductors, etc. The purity requirement is more than 99.99%, or even more than 99.999%. [0003] In ...

Claims

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Application Information

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IPC IPC(8): C07C41/34C07C41/36C07C41/42C07C43/12
CPCC07C41/34C07C41/36C07C41/42C07C43/123
Inventor 吴勇黎爽邹学鹏倪华王清罗生乔窦若岸陈彬彬罗凯
Owner CHINA BLUESTAR CHENGRAND CO LTD