Acetylene dimerization nonaqueous-phase catalyst and application thereof

Abstract

The invention relates to an acetylene dimerization nonaqueous-phase catalyst and application thereof. The acetylene dimerization nonaqueous-phase catalyst comprises a main catalyst, a cosolvent, an organic solvent and a reducing agent, wherein the main catalyst is cuprous chloride; the cosolvent is organic amine hydrochloride; the reducing agent is a mixture of one or more than two selected from a compound containing two or more hydroxys, sodium sulfite and copper powder; the compound containing two or more hydroxys refers to ascorbic acid, sodium ascorbate, kalium ascorbate, glucose, fructose and the like. The application of the catalyst in acetylene dimerization reaction comprises the following steps of: adding the catalyst into a reactor, then introducing acetylene into the reactor, and performing a dimerization reaction on acetylene at a reaction temperature of 60-90 DEG C and an acetylene airspeed of 100-250 h<-1>, so as to generate vinylacetylene. The catalyst is added with weak reducing agents such as ascorbic acid, so as to inhibit Cu<1+> of catalytic active ingredients in a reaction solution from being converted into Cu<2+>, and the conversion per pass of acetylene is increased.

Description

technical field [0001] The invention relates to a catalyst, in particular to an acetylene dimerization non-aqueous phase catalyst and application thereof. Background technique [0002] Vinyl acetylene is an important fine chemical intermediate, which is widely used in the production of various important chemical products such as neoprene, benzene and styrene. Among them, neoprene, as one of the seven major synthetic rubbers, has good comprehensive physical properties, such as resistance to combustion, light resistance, oxidation resistance, etc., and is generally used in the production of auto parts, machinery and industrial products and adhesives, etc. , coated fabrics, wires / cables, etc. are also widely used. At present, there are acetylene method and butadiene method for the industrial production of chloroprene rubber monomer (2-chloro-1,3-butadiene). Due to my country's special energy structure of "poor oil, little gas, and rich coal", 2-chloro-1,3-butadiene is mainly ...

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Problems solved by technology

[0005] Although there are related reports on the modification of non-aqueous catalysts, there are still major problems in the non-aqueous catalytic system of acetylene dimerization, such as: low conversion rate per pass; low selectivity of vinyl acetylene; It is easy to generate some tar-like high polymers, which reduces the service life of the catalyst

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