离子液体催化苯与环己烯的Friedel-Crafts烷基化反应

室温离子液体是由特定的阳离子和阴离子构成,具有独特的性质和功能。将路易斯酸型离子液体应用于苯和环己烯的烷基化反应,考察了苯与环己烯摩尔比、反应温度、反应时间对烷基化反应产物收率的影响。结果表明以制备的咪唑盐离子液体为催化剂,在反应温度80℃、反应时间1.0h、苯烯摩尔比8：1的条件下,所得环己基苯的产物收率最高,为86.75%。离子液体可重复使用,活性基本没有降低。

Friedel-Crafts Alkylation Reaction of Benzene with Cyclohexene by Ionic Liquids

Room-temperature ionic liquids were composed by particular cations and anions,with unique properties and functions.The Lewis acid ionic liquid was applied to the Friedel-Crafts alkylation reaction of benzene with cyclohexene.The influences of reactant ratio,reaction temperature and reaction time on the product yield of alkylation reaction were studied.Under optimized reaction conditions of 80℃,1.0h,n（benzene）∶n（cyclohexene） of 8∶1,the yield of cyclohexylbenzene was highest,86.75%.Ionic liquid can be recycled and reused with no decrease of its activity.