离子液体中异丁烷/2-丁烯烷基化反应机理研究  

Reaction mechanism of isoparaffin alkylation in the presence of ionic liquid

作　　者：王丽红[1] 李瑞[1] 刘鹰[1] 胡瑞生[1] 

机构地区：[1]内蒙古大学化学化工学院,内蒙古呼和浩特010021

出　　处：《燃料化学学报》2016年第6期738-744,共7页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(21266015;20806036)资助~~

摘　　要：以复合离子液体[Et_3NH]Cl-AlCl_3-CuCl为催化剂,在连续搅拌釜式反应器中进行了异丁烷与2-丁烯烷基化反应;利用氘代异丁烷同位素示踪法研究了催化反应机理。结果表明,在离子液体中异丁烷烷基化的反应诱导期较短;三甲基戊烷产物主要源于异丁烷的自烷基化、丁烷/丁烯的直接烷基化以及C_(12)^+中间体的裂化反应,而大部分二甲基己烷是仲丁基碳正离子与丁烯加成的产物。The alkylation of isobutane with butene catalyzed by [Et_3NH]Cl-AlCl_3-CuCl ionic liquid was carried out in a continuous stirred autoclave reactor; deuterated isobutane was used as an isotope tracer to investigate the reaction mechanism of alkylation.The results indicate that the induction period of alkylation catalyzed by[Et_3NH]Cl-AlCl_3-CuCl is less than 30 min.Tri-methyl-pentanes are primarily produced from the self-alkylation of isobutane,the alkylation of isobutane with 2-butene and the cracking of C_（12）~＋ intermediates,whereas the undesired di-methyl-hexane is mainly formed from the addition reaction between sec-C＋4and 2-butene.

关 键 词：离子液体 异丁烷 烷基化 反应机理 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]