Dazhen Xiong, Dr. Huiyong Wang, Zhiyong Li and Prof. Jianji Wang Recovery of Ionic Liquids with Aqueous Two-Phase Systems Induced by Carbon Dioxide ChemSusChem 5
Recovery of Ionic Liquids: Solutions of ionic liquids (ILs) and amines are separated into aqueous two-phase systems in the presence of CO2, in which the upper phase is ammonium-salt-rich and the lower phase is IL-rich. Thus, the ILs in aqueous solutions can be efficiently recovered, and the amines can be regenerated by heating and bubbling Ar or N2 through the salt-rich phase. The recovery efficiency of the ILs is as high as 99 %.
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