Patent ID: 9695383
Date: 2017-07-04
CPC Classifications: B01D,B01J,C11B,Y02W

Claim:
1. A process for in situ regeneration of spent filter aid from a winterization process on a pressure leaf filter comprising the successive steps of: a) circulating a regenerating oil through a spent filter aid cake in a direction of filtration in a circulation loop at a temperature of from 40° C. to 100° C., in a regenerating oil/spent filter aid (v/w) ratio of from 0.3/1 to 12/1; b) removing a portion of the regenerating oil from the spent filter aid cake resulting from step a), by draining using air pressure and then blowing using air or an inert gas, wherein the spent filter aid cake is not blown with steam, to form a treated spent filter aid cake containing from 35% to 50% of regenerating oil; and c) recovering the treated spent filter aid cake thus regenerated.