Catalyst for preparing butadiene from acetylene, preparation method and use thereof

Abstract

The invention provides a catalyst for preparing butadiene from acetylene. The catalyst comprises an organic solvent, an organic ionic liquid, nitrogen-containing hydrochloride, an active component anda cocatalyst, wherein the organic ionic liquid structurally contains vinyl. The invention also provides a method for preparing butadiene by using the catalyst. By using the catalyst and the method for preparing butadiene, the aim of reacting acetylene and hydrogen to directly generate butadiene can be realized, and process routes are reduced. A product butadiene is effectively obtained, a processis simple, high in efficiency, small in time consumption and low in cost, the catalyst is high in activity, and the selectivity of the target product butadiene is high.

Description

Technical field [0001] The invention relates to the technical field of catalyst preparation, in particular to a catalyst for preparing butadiene from acetylene and a method for preparing butadiene by using the catalyst. Background technique [0002] Butadiene is an important intermediate for the synthesis of butyl rubber, ABS resin and other rubber products. It can also be used to produce nylon 66, 1,4-butanediol, adiponitrile, higher alcohols, sulfolane, macrocyclic musk and other organic Chemical products, it is the basic chemical raw material second only to ethylene and propylene. The current research on the process of producing butadiene from acetylene is mainly divided into two steps: (1) Acetylene prepares vinyl acetylene (MVA) through dimerization, and requires separation and purification to remove impurities; (2) Selective catalytic hydrogenation of vinyl acetylene Prepared butadiene. The acetylene dimerization catalytic reaction usually adopts Newland catalyst to synth...

AI Technical Summary

Problems solved by technology

The catalytic reaction of acetylene dimerization usually adopts Newland catalyst to synthesize MVA in the water phase. This technology has a low single-pass conversion rate of acetylene, and the selectivity of MVA is not high; MVA is more active and easy to polymerize again

Newland's catalyst consumption is large, and waste disposal is difficult

The MVA selective catalytic hydrogenation technology to synthesize butadiene is still in the research stage. This technology usually uses a solid catalyst, which is easily deactivated and the pores of the catalyst are easily blocked by carbon deposits.

In addition, under the same catalyst and suitable reaction conditions, the technology of "one-step method" to directly prepare butadiene from acetylene has not been reported yet.