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Acetylene copolymer nonaqueous system catalyst and method for preparing vinyl acetylene

A non-aqueous and catalyst technology for acetylene dimerization, which is applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., and can solve the problem of increasing production costs and effectively converting vinyl Reduce the selectivity of acetylene, increase the threat of the surrounding environment, etc., to achieve the effect of improving selectivity, increasing the single-pass conversion rate of acetylene, and reducing adverse effects

Inactive Publication Date: 2011-01-12
CHONGQING UNIV
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Problems solved by technology

As a result, the effective conversion rate of acetylene, that is, the selectivity of vinyl acetylene decreases
[0004] (2) With the occurrence of side reactions during the catalytic reaction, the production of acetylene trimers and high polymers increases the production cost of the enterprise and increases the threat to the surrounding environment

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  • Acetylene copolymer nonaqueous system catalyst and method for preparing vinyl acetylene

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Embodiment Construction

[0019] One, a kind of acetylene dimerization non-aqueous system catalyst, this catalyst comprises cuprous chloride, organic ether and organic ionic liquid; Wherein, the structural expression of described organic ether is R 1 -O-(CH 2 CH 2 O) n -R 2 , the number of repeating units n=1~200, R 1 Represents a straight-chain or branched saturated or unsaturated hydrocarbon group containing 2 to 28 carbons, R 2 Represents a hydrogen atom or a saturated hydrocarbon group containing 1 to 5 carbons. The organic ether includes ethylene glycol pentyl ether, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, ethylene glycol monobutyl ether, diethylene glycol Alcohol propyl ether, or triethylene glycol hexyl ether; the organic ionic liquid is {Bmim]Cl, [Bmim]Br, [Bmim]BF 4 , [Emim]Cl, [Emim]Br, [Emim]BF 4 and one of the quaternary ammonium salts of 1-methyl-1-allyl-4-methylpiperazine. In the present invention, the catalyst component also includes organic amine hy...

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Abstract

The invention relates to an acetylene copolymer nonaqueous system catalyst and a method for preparing vinyl acetylene. The catalyst comprises cuprous chloride, organic ether, organic ion liquid, organic amine hydrochlorides, organic pentatomic or hexahydric nitrogen heterocyclic ring compounds, and N,N-dimethyl formamide. In the process of preparing vinyl acetylene, the cuprous chloride is added after other components are thoroughly mixed. The catalyst improves the properties of the prior Nieuland catalyst, and can keep the conversion per pass of the acetylene to be constant, obviously enhance the selectivity of the target product vinyl acetylene and the single-pass conversion rate of acetylene at the same time; and since the amounts of organic pentatomic or hexahydric nitrogen heterocyclic ring compounds, and organic ion liquid is small, and all the components can be recycled, so that the invention also has the advantages of low cost, simple method, high efficiency and the like.

Description

technical field [0001] The invention relates to a catalyst for preparing vinyl acetylene and its application in the process of preparing vinyl acetylene. Background technique [0002] Newland (Nieuwland) catalyst is made of cuprous chloride (Cu 2 Cl 2 ), ammonium chloride (NH 4 Cl) and hydrochloric acid (HCl) in an acidic aqueous solution. Using the acetylene dimerization method to synthesize the intermediate of neoprene - vinyl acetylene, the Newland catalyst is not only the only catalyst, but also has a long history. In the catalyst aqueous solution for synthesizing vinyl acetylene, it is divided into two categories: water system and non-aqueous system according to the proportion of water quality. For the purpose of improving the selectivity of vinyl acetylene and the one-pass conversion rate of acetylene, the application number is 2009101919934, and the title is "An Improved Water System Newland Catalyst and Its Application Method", which has been improved for the wat...

Claims

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Application Information

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IPC IPC(8): B01J31/30C07C11/30C07C2/38
Inventor 陶长元杜军范兴刘作华肖翠翠马纪翔薛红涛沈海宁孙大贵刘仁龙左赵宏彭敏
Owner CHONGQING UNIV
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