Patent ID: 7241728

Claim:
A process for purifying a contaminant-containing lipophilic fluid comprising undissolved contaminants, water and surfactant contaminants, and contaminants selected from the group consisting of non-polar body soil or food soil contaminants and polar dye or fatty acid contaminants in a fabric treating system comprising the steps of: a. filtering said contaminant-containing fluid to remove said undissolved contaminants; b. contacting said contaminant-containing lipophilic fluid from step (a) with a water absorbing material to remove said water; c. contacting the lipophilic fluid from step (b) with an ion-exchange material to remove said surfactant; and d. contacting the lipophilic fluid from step (c) with non-polar and polar absorbent materials to remove said non-polar and polar contaminants.