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化学进展 2005, Vol. 17 Issue (05): 793-799 前一篇   后一篇

• 综述与评论 •

超临界流体萃取分离离子液体与有机物及其相平衡的研究*

浮东宝;赵锁奇**;浦劲军;孙学文   

  1. 中国石油大学（北京）重质油国家重点实验室 北京 102249
  • 收稿日期:2004-09-01 修回日期:2005-01-01 出版日期:2005-09-24 发布日期:2005-09-24
  • 通讯作者: 赵锁奇
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Separation of Organics from Ionic Liquids Using Supercritical Fluids and Phase Behaviors of These Systems

Fu Dongbao;Zhao Suoqi**;Pu Jinjun;Sun Xuewen   

  1. State Key Laboratory of Heavy Oil, China University of Petroleum(Beijing),Beijing 102249,China
  • Received:2004-09-01 Revised:2005-01-01 Online:2005-09-24 Published:2005-09-24
  • Contact: Zhao Suoqi
离子液体具有一些优良的物理和化学性质,非常有希望成为传统有机溶剂的替代溶剂.但是如何从过程物流中分离和回收离子液体将是其工业化应用的一个很大挑战.蒸馏、液液萃取和超临界萃取是目前已知的三个可行的方法.其中超临界萃取可应用于离子液体与挥发的或相对不挥发的有机物的分离,而且不存在相间交叉污染.本文从二元体系相平衡、三元体系相平衡、模型化研究和萃取实验结果方面介绍了超临界萃取方法的最新研究进展,在此基础上提出了用超临界丙烷替代超临界二氧化碳作为萃取溶剂的新思路,并探讨了该领域今后的研究方向和工业化前景.
关键词： 离子液体, 超临界流体, 相平衡, 萃取, 有机物
Ionic liquids hold great potential as replacements for traditional volatile organic solvents due to iheir unique characteristics. However, the separation and recovery of ionic liquids from process streams is a major challenge for the development of industrial processes that will use these interesting new solvents. Distillation, liquid-liquid extraction and supercritical fluid extraction are known feasible separation methods. Among the rest, supercritical fluid extraction can be used to separate both volatile and relatively non-volatile organic compounds from ionic liquids without cross-contamina-tion between phases. The latest progress in the separation methods is reviewed from the aspects of phase behavior of bina-ry system, phase behavior of ternary system, modeling and experimental results of supercritical fluid extraction. A new idea is put forward that supercritical propane could be an alternative for supercritical carbon dioxide. The future research and the industrialization prospect of the technology are also approached.
Key words: ionic liquids, supercritical fluids, phase behaviors, extraction, organics

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