Patent ID: 6780321
Filing Date: 2004-08-24
Classification: B01D,C11B,Y02W

Abstract:
A process to recover oil from spent bleaching earth recovered from vegetable oil refining process characterized in that the process comprises:(i) treating the spent bleaching earth with a solvent selected from a group consisting of tuolene, acetone, xylene, isopropyl alcohol or n-hexane at a temperature between 35Â° C. to 50Â° C. to form a slurry; (ii) separating the solid and the liquid fractions from slurry formed in step (i) by (A) separating the mixture of solids and the liquid into a first solid fraction and a first liquid fraction; (B) treating the first solid fraction from step (A) with at least one of said solvents to form a second mixed second solid fraction and second liquid fraction; and (C) separating the second mixed solids and the liquid into a second solid fraction and a second liquid fraction; and (iii) extracting vegetable oil from at least one of the liquid fractions obtained in step (ii).