苯与环戊烯烷基化制备环戊基苯的工艺研究  

Preparation of cycloamyl benzene by alkylation of benzene and cyclopentene

作　　者：邓金中 吴明 DENG Jinzhong;WU Ming(Polyadmide Division,SINOPEC Hunan Petrochemical Co.,Ltd.,Yueyang 414007)

机构地区：[1]中石化湖南石油化工有限公司聚酰胺部,湖南岳阳414007

出　　处：《合成纤维工业》2024年第4期58-61,67,共5页China Synthetic Fiber Industry

基　　金：中石化股份有限公司研究项目(202223Z01)。

摘　　要：以苯和环戊烯为原料,采用固定床工艺通过烷基化反应合成环戊基苯,考察了不同结构催化剂的烷基化活性,并探讨了苯/环戊烯质量比、体积空速、反应温度、反应压力等对环戊烯转化率和环戊基苯选择性的影响。结果表明:催化剂对苯/环戊烯烷基化反应影响较大,孔道尺寸和酸性质均适宜的介孔沸石分子筛催化剂更适合催化苯/环戊烯烷基化制备环戊基苯;适当提高苯/环戊烯质量比、反应温度及降低反应空速、反应压力有利于烷基化反应向正反应方向进行,减少副反应发生;选择介孔沸石分子筛催化剂,在原料苯/环戊烯质量比81,体积空速3 h^(-1),反应温度180℃,反应压力2.0 MPa的条件下合成环戊基苯,环戊烯的转化率较高,为99.8%,环戊基苯的选择性为92.2%。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 benzene/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 pressure helped the alkylation reaction proceed in the positive direction and reduce the occurrence of side reactions;and the conversion 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 81,volum space velocity of 3 h^(-1),reaction temperature of 180℃and reaction pressure of 2.0 MPa.

关 键 词：苯 环戊烯 环戊基苯 烷基化 介孔沸石分子筛 

分 类 号：TQ340.42[化学工程—化纤工业]