中国炼油与石油化工 ›› 2013, Vol. 15 ›› Issue (1): 54-60.

• Scientific Research • 上一篇    下一篇

盐酸三乙胺-三氯化铝离子液体催化甲苯与氯代叔丁烷烷基化反应

陈晗1,罗国华2,徐新2,王衍力1,夏贾贾1   

  1. 1. 北京化工大学
    2. 北京石油化工学院
  • 收稿日期:2012-10-18 修回日期:2012-11-29 出版日期:2013-03-30 发布日期:2013-03-30
  • 通讯作者: 罗国华 E-mail:luoguohua@bipt.edu.cn

Et3NHCl-AlCl3 Ionic Liquids as Catalyst for Alkylation of Toluene with 2-Chloro-2-methylpropane

  • Received:2012-10-18 Revised:2012-11-29 Online:2013-03-30 Published:2013-03-30

摘要: 用盐酸三乙胺和无水三氯化铝合成了不同配比的Et3NHCl-AlCl3离子液体,研究了反应时间、反应温度、甲苯与离子液体的摩尔比、甲苯与氯代叔丁烷比对烷基化反应的影响。结果表明,Et3NHCl-AlCl3酸性离子液体具有较高的催化活性,良好的低温反应活性和对位选择性。得到了该反应优化反应条件:离子液体中AlCl3与Et3NHCl的摩尔比1.6,反应温度20℃,离子液体的用量为甲苯质量的10%,甲苯与氯代叔丁烷摩尔比2,反应10min。该条件下,氯代叔丁烷的转化率为98%,对叔丁基甲苯的选择性为82.5%。离子液体重复使用5次,其催化活性不变,离子液体再生后可循环使用。

Abstract: Alkylation of toluene with 2-Chloro-2-methylpropane (t-Bu-Cl) to synthesize p-tert-Butyltoluene (PTBT) was performed, which was catalyzed by triethylamine hydrochloride aluminum chloride ionic liquids. Different kinds of ionic liquids were prepared with Et3NHCl and AlCl3, and the effect of the molar ratio between AlCl3 and Et3NHCl, reaction time, reaction temperature, ionic liquid dosage, as well as the molar ratio of toluene to Chloro-2-methylpropane on the alkylation reaction of toluene with Chloro-2-methyl- propane was investigated. The optimal reaction conditions were detected to catalyze the reaction with high conversion of (t-Bu-Cl) and good selectivity for PTBT. Furthermore, the reusability and regeneration of the catalyst were explored.