Issue 57, 2018

Recovery and purification of ionic liquids from solutions: a review

Abstract

With low melting point, extremely low vapor pressure and non-flammability, ionic liquids have been attracting much attention from academic and industrial fields. Great efforts have been made to facilitate their applications in catalytic processes, extraction, desulfurization, gas separation, hydrogenation, electronic manufacturing, etc. To reduce the cost and environmental effects, different technologies have been proposed to recover the ionic liquids from different solutions after their application. This review is mainly focused on the recent advances of the recovery and purification of ionic liquids from solutions. Several methods for recovery of ionic liquids including distillation, extraction, adsorption, membrane separation, aqueous two-phase extraction, crystallization and external force field separation, are introduced and discussed systematically. Some industrial applications of ionic liquid recovery and purification methods are selected for discussion. Additionally, considerations on the combined design of different methods and process optimization have also been touched on to provide potential insights for future development of ionic liquid recovery and purification.

Graphical abstract: Recovery and purification of ionic liquids from solutions: a review

Article information

Article type
Review Article
Submitted
29 Jul 2018
Accepted
13 Sep 2018
First published
21 Sep 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 32832-32864

Recovery and purification of ionic liquids from solutions: a review

J. Zhou, H. Sui, Z. Jia, Z. Yang, L. He and X. Li, RSC Adv., 2018, 8, 32832 DOI: 10.1039/C8RA06384B

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