醚基功能化离子液体合成及催化烷基化反应  

Isobutane alkylation catalyzed by ether functionalized ionic liquids

作　　者：卢丹[1,2] 赵国英[2] 任保增[1] 江振西[1] 张锁江[2] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450000 [2]中国科学院过程工程研究所,离子液体清洁过程北京市重点实验室,多相复杂系统国家重点实验室,北京100190

出　　处：《化工学报》2015年第7期2481-2487,共7页CIESC Journal

基　　金：国家自然科学基金项目(51374193);北京市自然科学基金项目(2122052);国际科技合作与交流专项(2014DFA61670)~~

摘　　要：合成了一系列酸性的醚基功能化离子液体,对其进行了表征和测定。通过乙腈探针红外光谱法确定了最强酸性的催化剂,并将其用于催化异丁烷与2-丁烯的烷基化反应。结果表明:1-甲氧基乙基-3-甲基咪唑溴氯铝酸离子液体([MOEMIM]Br/Al Cl3)在Al Cl3摩尔比为0.75时酸性最强,催化烷基化反应效果最佳;在反应温度35℃,异丁烷与2-丁烯体积比10:1的反应条件下催化烷基化反应,可得到C8选择性66.6%的烷基化油;其催化效果远优于非醚基功能化氯铝酸离子液体的催化效果;该催化剂可循环利用。A series of acidic ether functionalized chloroaluminate ionic liquids were synthesized and studied. The catalyst with the highest acidity was screened out by FT-IR spectra using acetonitrile as infrared probe and used to catalyze the alkylation of isobutane with 2-butene. It was proved that the acidity of 1-methoxyethyl-3-methylimidazolium bromide aluminium chloride （[MOEMIM]Br/AlCl3） was the highest when the molar ratio of AlCl3 was 0.75. The high quality alkylate with a C8 selectivity of 66.6%（mass） was obtained at 35℃ with the isoparaffin/olefin molar ratio （I/O） of 10, which was much better than that with non-ether functionalized chloroaluminate ionic liquids. The catalysts could be reused several times without obvious loss of activity.

关 键 词：离子液体 烷基化 烷烃 酸性 催化剂 

分 类 号：TQ519[化学工程]