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Preparation method of hexafluorobutadiene

A technology for hexafluorobutadiene and trifluoroethylene, which is applied in the field of preparing hexafluorobutadiene, can solve the problems of low yield, rare raw materials, and difficulty in industrialization, and achieves high yield, high reaction efficiency, and high conversion rate. Effect

Pending Publication Date: 2019-12-20
FUJIAN DEER TECH CORP
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  • Claims
  • Application Information

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Problems solved by technology

[0010] However, the above methods for preparing hexafluorobutadiene from dichlorotrifluoroethane all have the problems of rare raw materials, low yield and difficult industrialization.

Method used

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  • Preparation method of hexafluorobutadiene
  • Preparation method of hexafluorobutadiene
  • Preparation method of hexafluorobutadiene

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Embodiment Construction

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

[0043] Process flow of the present invention such as figure 1 Shown:

[0044] Taking chlorotrifluoroethylene as raw material, adding chlorotrifluoroethylene into a metering tank for metering, the metered chlorotrif...

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Abstract

The invention discloses a preparation method of hexafluorobutadiene. The preparation method includes the following steps that (1) a hydrogenation reaction is carried out with trifluorochlor oethyleneas raw materials under the action of a first catalyst to obtain trifluoroethylene; (2) the trifluoroethylene is introduced into a bromination reactor for conducting a bromination reaction with brominein the reactor, 1,2-dibromo-1,1,2-trifluoroethane is obtained, and then trifluorobromoethylene is obtained by dehydrobromination; (3) the trifluorobromoethylene reacts in a reactor containing a solvent, an initiator and zinc powder to generate zinc reagent trifluorovinyl zinc bromide; and (4) the zinc reagent trifluorovinyl zinc bromide is coupled under the action of a second catalyst to obtain the hexafluorobutadiene. The preparation method has the advantages of low energy consumption, high yield, high reaction efficiency and the like.

Description

technical field [0001] The invention relates to a method for preparing hexafluorobutadiene, in particular to a method for preparing hexafluorobutadiene by using chlorotrifluoroethylene as a raw material. Background technique [0002] Hexafluorobutadiene, also known as perfluorobutadiene, referred to as HFBD, has the molecular formula C 4 f 6 . Hexafluorobutadiene is an important monomer for synthetic resins and fluorine-containing substances. At present, the application of hexafluorobutadiene mainly focuses on the plasma dielectric etching processing technology of semiconductor products. Compared with traditional plasma etching gas CF 4 、C 2 f 6 、C 3 f 8 、NF 3 Compared to C 4 f 6 It has faster etch rate, high etch selectivity and high aspect ratio. In addition, in accordance with the requirements of international conventions such as the "Kyoto Protocol" and the "Paris Agreement" and the requirements of the construction of an international low-carbon society, it i...

Claims

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Application Information

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IPC IPC(8): C07C17/263C07C21/20
CPCC07C17/263C07C17/25C07C17/02C07F3/06C07C21/20C07C21/18C07C19/14
Inventor 张奎黄天梁黄荣保
Owner FUJIAN DEER TECH CORP
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