文档介绍：
烷烃/芳烃在阴离子含氰基离子液体中的分
离选择性#
相晓晴,徐倩倩,苏宝根,任其龙**
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(浙江大学生物质化工教育部重点实验室化学工程与生物工程学系, 杭州 310027)
摘要:沸点相近或易形成共沸物的烷烃/芳烃体系难以用常规精馏法分离,现有萃取剂又存
在选择性低、污染大、回收难等问题,利用离子液体的不挥发性和可设计性有望解决这些问
题,关键是烷烃/芳烃在离子液体中分配数据的测定。利用毛细管柱柱效高、分离性能好、
测量精度高的优点,采用毛细管气相色谱法测定烷烃/芳烃在阴离子含氰基离子液体中的分
配参数。通过对比五种含氰基离子液体、[bmim][PF6]和三种常规有机萃取剂对烷烃/芳烃体
系的分离选择性,发现阴离子含氰基离子液体对烷烃/芳烃的选择性较高,具有成为高性能
萃取剂的可能。
关键词:毛细管气相色谱;氰基离子液体;烷烃;芳烃;分离选择性
中图分类号:
Separation Selectivity of Alkanes/Aromatics in Cyano-group
ionic liquids
XIANG Xiaoqing, XU Qianqian, SU Baogen, Ren Qilong
(Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Department of
Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027)
Abstract: Alkanes- aromatics mixtures with similar boiling point or may easily form azeotrope are
difficult to separate using conventional distillation. Extraction or extractive distillation is often
applied. Traditional volatile entrainers usually suffer from vapor pollution, low selectivity and
recycling difficulties. Ionic liquids (IL), which are nonvolatile and designable, may be used as
effective and superior entrainers for the separation anic mixtures. The key to this application
is thermodynamic partition properties anic solvents in IL. Capillary columns with better
column efficiency and separation performence than packed columns should provide higher