Preparation method and application of catalyst for producing mixed propylbenzene through alkylation of benzene and C4 olefin

Abstract

The preparation method of the catalyst comprises the following steps: mixing at least one zeolite with a binder, adding water and a peptizing agent, kneading, extruding and molding, and then sequentially drying and roasting, finally, the roasted catalyst is subjected to metal or nonmetal oxide modification through an impregnation method, and the required catalyst is obtained. According to the present invention, benzene and C4 olefin are adopted as reaction raw materials, the catalyst obtained by using the preparation method is adopted to catalyze the reaction of benzene and butene so as to generate the target product mixed propylbenzene, the reaction can be performed under the mild reaction condition, the reaction speed is high, and the olefin conversion rate is high. Through measurement, under the conditions that the reaction temperature is 360 DEG C, the reaction pressure is 0.8 MPa, the total weight hourly space velocity is 5.0 h <-1 > and the molar ratio of benzene to alkene is 5.5: 1, the conversion rate of C4 olefin reaches 99.8%, the selectivity of the product mixed propylbenzene reaches 72.6%, the proportion of isopropyl benzene in the mixed propylbenzene is 52.69%, and the proportion of n-propylbenzene in the mixed propylbenzene is 47.31%.

Description

technical field [0001] The invention relates to a method for producing mixed propylbenzene by alkylation of benzene and carbon tetraolefin, and also relates to a catalyst applied to the aforementioned method and a preparation method thereof. Background technique [0002] With the rapid development of petroleum refining and coal chemical industry, the output of C4 in my country has increased year by year, but the amount of fine chemical utilization of C4 fraction in my country is very small, and the effective chemical utilization rate is very low, resulting in huge waste of resources. Therefore, the comprehensive utilization of the by-product mixed C4 is an important subject of petrochemical technology research and process development at home and abroad. [0003] With the advent of my country's "Great Refining and Chemical Era", thanks to the liberalization of domestic crude oil import quotas, refining and chemical enterprises have put into operation one after another, result...

AI Technical Summary

Problems solved by technology

The invention patent with the publication number CN103102240A relates to a synthesis method of sec-butylbenzene, which uses carbon tetralinear organic compounds and benzene to undergo an alkylation reaction at a temperature of 100-280°C and a pressure of 1.0-6.0MPa to synthesize sec-butylbenzene. It mainly solves the problem of unstable catalyst and poor selectivity in molecular sieves existing in the prior art

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