氯铝酸盐离子液体催化苯与丙烯的烷基化反应

以盐酸三乙胺季铵盐和AlCl3形成的氯铝酸盐离子液体为催化剂，实验考察了离子液体中AlCl₃物质的量分数、催化剂用量、苯烯物质的量比、反应温度以及反应时间对苯与丙烯烷基化反应的影响。结果表明，增加离子液体中AlCl₃物质的量分数、催化剂用量、反应时间和苯烯物质的量比，降低反应温度均有利于丙烯转化率和异丙苯选择性的提高。在优化条件下，即离子液体中AlCl3物质的量分数为66.7%、催化剂用量为苯的质量的10%、苯烯物质的量比为10、反应温度为40℃及常压反应条件下， 10min时丙烯转化率和异丙苯选择性均可达到97.6%。离子液体催化剂重复使用8次后仍能基本保持新催化剂的性能，但如何增加循环使用的次数尚需进一步研究。

Alkylation of benzene with propylene catalyzed by chloroaluminate ionic liquids

A chloroaluminate ionic liquid consisting of triethylamine hydrochloride and anhydrous AlCl_3 was used to catalyze the alkylation of benzene with propylene.The effect of varying reaction conditions was investigated experimentally.The results show that the conversion of propylene and the selectivity to cumene are increased by increasing the mole fraction of AlCl_3 in the ionic liquid,the amount of catalyst,the mole ratio of benzene to propylene and the reaction time and by reducing the temperature.Under optimal conditions,with 66.7% mole fraction of AlCl_3 in the ionic liquid,10 wt% of catalyst with respect to benzene,10:1 molar ratio of benzene to propylene and temperature of 313K,both conversion of propylene and selectivity to cumene can reach 97.6% in 10 minutes.The activity of the catalyst remains essentially unchanged after being reused eight times,however,further work is still needed to improve the reusability of the catalyst.