CPC B01D 61/362 (2013.01) [B01D 43/00 (2013.01); B01D 61/027 (2013.01)] | 20 Claims |
1. A method for separating a solvent, the method comprising:
mixing a waste solvent with a reactant to cause precipitation or complexing and forming a mixture;
filtering the mixture using a nanofiltration membrane and forming a permeate;
distilling or evaporating the permeate to form a concentrated solvent;
condensing or cooling the concentrated solvent to below a boiling point of solvents in the concentrated solvent; and
filtering the concentrated solvent using pervaporation to form a purified solvent.
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