Stability and Selectivity of Supported Liquid Membranes with Ionic Liquids for the Separation of Organic Liquids by Vapor Permeation
Stability and Selectivity of Supported Liquid Membranes with Ionic Liquids for the Separation of Organic Liquids by Vapor Permeation
复制标题
用于蒸汽渗透分离有机液体的离子液体负载液膜的稳定性和选择性
DOI：
10.1021/ie7017004
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发表时间：
2008-09
影响因子：
4.2
通讯作者：
Lin, Jia
中科院分区：
文献类型：
--
作者：
Peng, Yong;Wang, Baoguo;Wu, Feng;Lin, Jia
以室温离子液体（RTIL）为膜液，采用气相渗透法分离甲苯/环己烷体系，并对正丙醇和乙醇水溶液进行脱水，部分提高了支撑液膜（SLMs）的稳定性。由于RTIL的基本特性是具有高表面张力和不可检测的蒸汽压，因此完全避免了膜液的蒸发损失。甲苯/环己烷混合物的分离进行长达550小时，分离因子保持在15 - 25的范围内，膜显示出良好的蒸汽渗透耐久性。使用离子液体的SLM被证明是一种很有前途的方法，用于分离有机/有机和有机/水混合物。
The stability of supported liquid membranes (SLMs) was partially improved by using a room-temperature ionic liquid (RTIL) as the membrane liquid and by employing a vapor permeation process for the separation of toluene/cyclohexane systems and the dehydration of aqueous 1-propanol and aqueous ethanol mixtures. Because the basic characteristics of RTILs are that they have high surface tension and no detectable vapor pressure, the loss of membrane liquid by evaporation was avoided completely. The separation of toluene/cyclohexane mixtures was conducted for as long as 550 h, and the separation factor was kept within the range of 15−25, with the membrane showing good durability in vapor permeation. The use of SLMs with ionic liquids was shown to be a promising method for separating organic/organic and organic/water mixtures.