Using benzene and cyclohexene as raw materials,cyclopentyl benzene was synthesized through alkylation reaction using a fixed bed process.The alkylation activity of catalysts with different structures was investigated.And the effects of ben-zene/cyclopentene mass ratio,volume space velocity,reaction temperature,reaction pressure,etc.,on the conversion rate of cyclopentene and the selectivity of cyclopentyl benzene were investigated.The results showed that catalysts had a significant impact on the alkylation reaction of benzene/cyclopentene,and mesoporous zeolite molecular sieve catalysts with rational pore size and acidity were more suitable for catalyzing the alkylation of benzene/cyclopentene to prepare cyclopentyl benzene;properly increasing the mass ratio of benzene/cyclohexene and reaction temperature and reducing reaction space velocity and reaction pres-sure helped the alkylation reaction proceed in the positive direction and reduce the occurrence of side reactions;and the conver-sion rate of cyclopentene was as high as 99.8%and the selectivity of cyclopentyl benzene was 92.2%when cyclopentyl benzene was synthesized by selecting mesoporous zeolite molecular sieve catalyst under the conditions of benzene/cyclohexene mass ratio of 8:1,volum space velocity of 3 h-1,reaction temperature of 180℃ and reaction pressure of 2.0 MPa.
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