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.
作者
邓金中
吴明
DENG Jinzhong;WU Ming(Polyadmide Division,SINOPEC Hunan Petrochemical Co.,Ltd.,Yueyang 414007)
出处
《合成纤维工业》
CAS
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)。
关键词
苯
环戊烯
环戊基苯
烷基化
介孔沸石分子筛
benzene
cyclopentene
cyclopentyl benzene alkylation
mesoporous zeolite molecular sieve
作者简介
邓金中(1972-),男,工程师,从事化工生产技术及研究开发工作。E-mail:dengjzh20.hnsh@sinopec.com。
