Catalyst for producing vinyl acetate by acetylene method and preparation method and use thereof

Abstract

The invention discloses a catalyst used for producing vinyl acetate by an acetylene method, a preparation method used for the catalyst and the application of the catalyst. The catalyst takes polymer derivative carbon as carrier; the active component of the catalyst is zinc acetate; the loading quantity of the zinc acetate in the catalyst is 5-35%; the former body of the derivative carbon is resin microsphere by copolymerization of acrylonitrile and vinylidene chloride; the monomer molar proportion of acrylonitrile and vinylidene chloride is 1:10-3:10. The catalyst has excellent mechanical strength, has good comprehensive performance in the catalytic reaction and the better reaction temperature is 160-220 DEG C.

Description

Technical field: [0001] The invention belongs to the field of chemical production, and in particular relates to a catalyst for producing vinyl acetate by using acetic acid and acetylene gas, its preparation method and specific application. Background technique: [0002] Vinyl acetate (VAc) is one of the organic chemical raw materials with the largest output in the world. As an important organic chemical raw material, it is mainly used to produce polyvinyl acetate (PVAc), polyvinyl alcohol (PVA), ethylene-vinyl acetate copolymer (VAE ), vinyl chloride-vinyl acetate copolymer (EVC), polyacrylonitrile comonomer and other derivatives, these derivatives have a wide range of uses, and can be used in coatings, pastes, adhesives, vinylon, films, vinyl copolymer resins , Acetal resin and other chemical products, with the advancement of science and technology, new application fields are still expanding. [0003] In 1922, Muqaen of Germany discovered that zinc acetate catalyst impregn...

AI Technical Summary

Problems solved by technology

[0004] The catalyst used in the synthesis of vinyl acetate by acetylene vapor phase method is Zn(CH 3 COO) 2 /C, an important disadvantage of this catalyst is that the production capacity is not high

In order to improve the production capacity of the catalyst, scholars at home and abroad have done a lot of research work, mainly focusing on the research and development of catalyst active components with high activity. For example, Japanese scholars have proposed a two-component oxide (V 2 o 5 -ZnO and Fe 2 o 3 ) or three-component oxide (16ZnO·32Fe 2 o 3 ·V 2 o 5 ) as the active component of the catalyst, although at 250 °C has a higher 3 COO) 2 The production capacity of /C catalyst, but i

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