Isobutane alkylation catalyzed by ether functionalized ionic liquids

doi:10.11949/j.issn.0438-1157.20150233

CIESC Journal ›› 2015, Vol. 66 ›› Issue (7): 2481-2487.DOI: 10.11949/j.issn.0438-1157.20150233

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Isobutane alkylation catalyzed by ether functionalized ionic liquids

LU Dan^1,2, ZHAO Guoying², REN Baozeng¹, JIANG Zhenxi¹, ZHANG Suojiang²

1 School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450000, Henan, China;
2 Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China

Received:2015-02-13 Revised:2015-04-10 Online:2015-07-05 Published:2015-07-05
Supported by:
supported by the National Natural Science Foundation of China (51374193), the Natural Science Foundation of Beijing(2122052) and the Special Program for International Science and Technology Cooperation and Exchange Program of China (2014DFA61670).

醚基功能化离子液体合成及催化烷基化反应

卢丹^1,2, 赵国英², 任保增¹, 江振西¹, 张锁江²

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

通讯作者: 任保增, 张锁江
基金资助:
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)。

Abstract

Abstract:

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.

Key words: ionic liquids, alkylation, alkane, acidity, catalyst

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/AlCl₃)在AlCl₃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。

关键词: 离子液体, 烷基化, 烷烃, 酸性, 催化剂

CLC Number:

TQ519

LU Dan, ZHAO Guoying, REN Baozeng, JIANG Zhenxi, ZHANG Suojiang. Isobutane alkylation catalyzed by ether functionalized ionic liquids[J]. CIESC Journal, 2015, 66(7): 2481-2487.

卢丹, 赵国英, 任保增, 江振西, 张锁江. 醚基功能化离子液体合成及催化烷基化反应[J]. 化工学报, 2015, 66(7): 2481-2487.

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Isobutane alkylation catalyzed by ether functionalized ionic liquids

醚基功能化离子液体合成及催化烷基化反应

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