PURIFICATION METHOD OF IONIC LIQUID USING REFRIGERANTS

摘要

PURPOSE: A method for refining ionic liquid using coolant is provided to improve the purity of the ionic liquid and to be adopted for separating or collecting processes with respect to the ionic liquid. CONSTITUTION: Ionic liquid and liquid coolant are mixed before a refining process. The mixture of the ionic liquid and the coolant is extracted. The coolant is vaporized from the mixture. The coolant is CFC-based coolant, HCFC-based coolant, HFC-based coolant, or the mixture of the same. The ionic liquid is imidazolium-based, ammonium-based, choline-based, phosphonium-based, sulfonium-based pyridinium-based, or pyrazolium-based ionic liquid.