Cu对离子液体异丁烷/丁烯烷基化反应选择性的影响研究

刘鹰; 孙宏娟; 丛迎楠; 胡瑞生

Cu对离子液体异丁烷/丁烯烷基化反应选择性的影响研究

内蒙古大学化学化工学院, 内蒙古呼和浩特 010021

基金项目: 国家自然科学基金（21266015）。

详细信息

通讯作者:
刘鹰，Tel：13947125718，E-mail：celiuy@imu.edu.cn。

中图分类号: TE624.9
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- 被引次数: 0
出版历程
- 收稿日期: 2014-03-21
- 修回日期: 2014-06-10
- 刊出日期: 2014-08-30

Study on the selectivity of isobutane/2-butene alkylation catalyzed by ionic liquid with Cu compound

School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China

摘要

摘要: 合成并表征了[BMIm]Cl-1.8AlCl₃-0.5CuCl、[Et₃NH]Cl-1.8AlCl₃/CuAlCl₄等离子液体，考察了含Cu离子液体等酸性催化剂中的异丁烷/丁烯烷基化反应，研究了Cu对离子液体烷基化选择性的影响。结果表明，Cu的引入对离子液体酸性的影响较小，不是反应选择性提高的主要原因，而烷基化过程中CuAlCl₅^-/CuAlCl₄等配合物的存在，以及它们对2-丁烯的络合吸附是改善离子液体催化选择性的关键因素。相同反应条件下，[Et₃NH]Cl-1.8AlCl₃/CuAlCl₄、[BMIm]Cl-1.8AlCl₃/CuAlCl₄等催化剂的三甲基戊烷选择性最高可达87.5%（质量分数），产物辛烷值100.5，明显优于硫酸、常规氯铝酸离子液体和复合离子液体等烷基化汽油辛烷值。
- 离子液体 /
- 异丁烷 /
- 烷基化 /
- 选择性
Abstract: The Cu-containing ionic liquids (IL), like [BMIm]Cl-1.8AlCl₃-0.5CuCl and [Et₃NH]Cl-1.8AlCl₃/ CuAlCl₄, were synthesized and characterized. The selectivity of isobutene/butene alkylation of Cu-containing IL was also investigated. The results showed that the selectivity had little relation to the acidity of Cu-containing IL. The research octane number (RON) of [Et₃NH]Cl-1.8AlCl₃/CuAlCl₄ alkylate could be higher than 100, which was better than those obtained by sulfuric acid, common chloroaluminate IL, and composite IL under the identical reaction conditions. The complexation of CuAlCl₄ with 2-butene in alkylation process should be accounted for the super selectivity of trimethylpentane (TMP) of isobutane alkylation catalyzed by Cu-containing IL.
- ionic liquid /
- isobutane /
- alkylation /
- selectivity

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参考文献(21)

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