Synthesis of cyclohexylbenzene using pyridine-based ionic liquid/p-toluenesulfonic acid systems

被引：0
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作者：
机构：
[1] Department of biology and chemical Engineering, Jiaxing University, Jiaxing
[2] School of Pharmaceutical Sciences, Zhejiang University, Hangzhou
[3] Key Laboratory of Chemical Cleaning Technology, Jiaxing City, Jiaxing
来源：
Zong, Qian-Shou | 1600年 / Zhejiang University卷 / 28期
关键词：
Cyclohexylbenzene; Ionic liquid; P-toluenesulfonic acid; Synthesis;
D O I：
10.3969/j.issn.1003-9015.2014.04.037
中图分类号：
学科分类号：
摘要：
Cyclohexylbenzene was prepared by alkylation of benzene and cyclohexene using pyridine-based ionic liquid and p-toluenesulfonic acid systems. This process has the advantages of mild reaction conditions, easy operation, no pollution and high yield. The effects of ionic liquid types, reaction time and temperature, catalyst and reactant weight ratios and catalyst reusing on the yield of cyclohexylbenzene were investigated and the process was optimized. The results show that the system has the best performance under following conditions: ionic liquid: N-methylpyridinium methylsulfate, reaction time: 40 min, reaction temperature: 60℃, m(catalyst)/m(all substrate)=7.4%, m(benzene)/m(cyclohexene)=12.5:1. The catalyst maintained good activity after being reused for 5 times. Under the optimum conditions, the yield of ethyl cyclohexene is 99.5% and the purity is 99.9%.
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页码：924 / 927
页数：3
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