物理化学学报 >> 2004, Vol. 20 >> Issue (09): 1083-1088.doi: 10.3866/PKU.WHXB20040905

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二苯醚烷基化反应中酸性离子液体的循环使用

朴玲钰;韩扬;寇元   

  1. 北京大学化学与分子工程学院,物理化学研究所,分子动态与稳态结构国家重点实验室,北京　100871
  • 收稿日期:2004-03-02 修回日期:2004-04-20 发布日期:2004-09-15
  • 通讯作者: 寇元 E-mail:yuankou@pku.edu.cn

The Reuse of Acidic Ionic Liquids as Catalysts in Diphenyl Oxide Alkylation with Dodecene

Piao Ling-Yu;Han Yang;Kou Yuan   

  1. Institute of Physical Chemistry, State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, Peking University, Beijing　100871
  • Received:2004-03-02 Revised:2004-04-20 Published:2004-09-15
  • Contact: Kou Yuan E-mail:yuankou@pku.edu.cn

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摘要： 使用酸性离子液体催化二苯醚与十二烯烷基化反应,考察了离子液体的失活原因,提出了循环使用离子液体的解决办法.在二苯醚与十二烯烷基化反应中, Lewis酸性离子液体不能多次循环使用的原因是离子液体与二苯醚相互作用导致具有催化活性的Al2Cl72－分解、流失.改变离子液体的阳离子不能从本质上解决其与二苯醚间的相互作用.适时补加损失量的AlCl3使离子液体的Lewis酸性得以恢复,可以解决体系中酸性离子液体循环使用问题,循环使用8次后产物产率仍保持90％左右.

关键词: Lewis酸性, 离子液体, 二苯醚, 十二烯, 烷基化反应, 循环使用

Abstract: The diphenyl oxide alkylation with dodecene catalyzed by acidic ionic liquids has been studied. The reuse potential of acidic ionic liquids has been investigated. The reasons for the deactivation of the acidic ionic liquids are the decomposition and leaching of the actual catalytic species Al2Cl72－ from the interaction between acidic ionic liquids and diphenyl oxide. The interaction between acidic ionic liquids and diphenyl oxide couldn’t be avoided by changing the cations of ionic liquids. The reuse problem of acidic ionic liquids can be solved when certain amount of AlCl3 is added into the used ionic liquids. The yield of target product is still around 90％ after 8 cycles of the ionic liquids.

Key words: Lewis acidity, Ionic liquids, Diphenyl oxide, Dodecene, Alkylation, Reuse