欢迎访问过程工程学报, 今天是

过程工程学报 ›› 2017, Vol. 17 ›› Issue (5): 1016-1022.DOI: 10.12034/j.issn.1009-606X.217126

• 过程与工艺 • 上一篇    下一篇

醚基复合氯铝酸离子液体催化异丁烷烷基化

张振华1,2, 赵国英2*, 卢 丹1, 汪敬恒1, 任保增1*   

  1. 1. 郑州大学化工与能源学院,河南 郑州 450001;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,北京 100190
  • 收稿日期:2017-02-08 修回日期:2017-03-08 出版日期:2017-10-20 发布日期:2017-10-10
  • 通讯作者: 张振华 zdzhangzh@126.com
  • 基金资助:
    面向碳捕集分离的离子液体基框架材料的定向合成及构效调控;阴阳离子簇协同微催化烷基化反应机理及调控机制研究;化工过程的质能强化及低能耗反应/分离工艺

Alkylation of Isobutane with Butene over Ether-functionalized Composited Chloroaluminate Ionic Liquids

Zhenhua ZHANG1,2,  Guoying ZHAO2*,  Dan LU1,  Jingheng WANG1,  Baozeng REN1*     

  1. 1. School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou, Henan 450001, China; 2. Beijing Key Lab of Ionic Liquids Clean Process, Inst. Process Eng., Chinese Academy of Sciences, Beijing 100190, China
  • Received:2017-02-08 Revised:2017-03-08 Online:2017-10-20 Published:2017-10-10

摘要: 制备了4种醚基离子液体(1-甲氧基乙基-3-甲基咪唑氯盐[MOEMIM]Cl、1-甲氧基乙基-3-甲基咪唑溴盐[MOEMIM]Br、N,N,N-三甲基-N-甲氧基乙基溴化铵[N111,1O2]Br和N,N,N-三乙基-N-甲氧基乙基溴化铵[N222,1O2]Br),作为三乙胺盐酸盐氯铝酸离子液体的助剂催化异丁烷烷基化反应,考察了4种醚基离子液体及其添加量对氯铝酸离子液体催化烷基化的影响. 结果表明,在反应温度25℃、进料速率500 mL/h、酸烃体积比20:60、添加6%(?) [MOEMIM]Cl的条件下,C8选择性由47.7%提高至63.6%,辛烷值(RON)由83.5提高至93.2. 优化后的醚基复合氯铝酸离子液体催化剂至少循环20次活性不降低,显示了较好的催化性能. 醚基离子液体助剂对烷基化性能的提高可归功于提高异丁烷溶解度、抑制酸度降低和提高界面性能.

关键词: 氯铝酸离子液体, 异丁烷, 烷基化, 醚, 催化

Abstract: Four ether-functionalized ionic liquids including 1-methoxyethyl-3-methyl imidazole chloride ([MOEMIM]Cl), 1-methoxyethyl-3-methyl imidazole bromide ([MOEMIM]Br), N,N,N-trimethyl-N-(2- methoxyethyl) ammonium bromide ([N111,1O2]Br), N,N,N-triethyl-N-(2-methoxyethyl) ammonium bromide ([N222,1O2]Br), were synthesized and applied as co-catalyst of triethylamine hydrochloride chloroaluminate ionic liquids for isobutane alkylation. The effect of four kinds of ionic liquids and the addition amounts on the catalytic performance of chloroaluminate ionic liquids had been systematically investigated. The results showed that addition of 6%(?) [MOEMIM]Cl into triethylamine hydrochloride chloroaluminate ionic liquids improved the C8 selectivity from 47.7% to 63.6% and research octane number (RON) from 83.5 to 93.2 at 25℃, 500 mL/h feed rate, 20:60 the volume ratio of acid to hydrocarbon. The optimized ether-functionalized composited ionic liquids catalyst could be reused for at least 20 times without loss activity. These enhancement is believed to result from the increased isobutane solubility, the inhibited acidity and improved interfacial properties.

Key words: chloroaluminate ionic liquids, isobutane, alkylation, ether-functionalized ionic liquids, catalysis