离子液体超酸清洁催化苯的烷基化反应

研究了在具有Lewis酸性的离子液体体系中进行的苯与烯烃及卤代烃的烷基化反应.以氯化1-甲基-3-乙基咪唑(MEIC)、氯化1-丁基吡啶(BPC)、氯化l-甲基-3-丁基咪唑(MBIC)及盐酸三甲胺(TMHC)季铵盐分别与AlCl3原位合成法制备离子液体催化体系.结果表明:以上各种离子液体均有很高的催化活性,反应转化率在较短的时间内达到100%.其中TMHC-A1Cl3离子液体单烷基化选择性达98.6%.与AlCl3相比,催化活性显著提高,生成烷基化产物不溶于离子液体,因而易于分离,催化剂可重复使用.

Alkylation of Benzene in Ionic Liquids at Room Temperature

Alkylation of benzene with alkene and/or chloroethane in Lewis acid-typeionic liquid catalysts, MEIC AlCl 3, MBIC AlCl 3, BPC AlCl 3 and TMHC AlCl 3, which in situ were prepared by the reaction of 1-methyl-3-ethylinidazole chloride (MEIC), 1-methyl-3-butylinidazole chloride (MBIC), 1-butylpyridium chloride(BPC) and trimethylamine hydrochloride (TMHC) with AlCl 3 respectively, at room temperature has been investigated. The experimental result shows that the ionic liquid catalysts have higher catalytic activity than that of peer AlCl 3. The conversion can reach 100% in shorter time and the selectivity of TMHC-AlCl 3 for monoalkylation of benzene can get 98 6%. In addition, the products are easily separated and the ionic liquid catalysts can be reused in the reaction.