Patent ID: 6620324
Filing Date: 2003-09-16
Classification: B01D,B01J,C02F

Abstract:
An improved method for purifying polar solvents and miscible aprotic solvents, using exfoliated layered material to entrap contaminants as inclusions, that provides a means to remove a high percentage of said contaminants and recover a quantity of the exfoliated layered material for reuse. Said method being comprised of the steps of:a) applying inclusion methods for purifying a solvent to a contaminated solvent (X) while using an excess of suspended exfoliated layered material b) separating a concentrate comprised of restacked exfoliated layered material entrapping contaminants as inclusions and restacked exfoliated layered materials without entrapped contaminants from said solvent c) resuspending said concentrate in a second uncontaminated polar solvent (Y) in order to separate said layered materials entrapping contaminants from layered material without entrapped contaminants d) separating said layered material entrapping said contaminants from said layered material without contaminants.