Patent ID: 6306197
Filing Date: 2001-10-23
Classification: B01D

Abstract:
A gas phase isopropyl alcohol (Iremoval system, comprising:a scrubber unit having a liquid sump portion and a liquid recirculation portion and adapted to receive and contact a gas feed stream containing a concentration of IPA with a water stream;a pump assembly adapted to draw a recirculation stream from the liquid sump portion of the scrubber unit and deliver the recirculation stream to the return portion of the scrubber unit, wherein the recirculation stream contains at least a portion of the IPA in the feed stream; anda reverse osmosis assembly including at least one reverse osmosis unit adapted to receive the recirculation stream prior to delivery to the return portion of the scrubber unit and to reduce the concentration of IPA therein to below a determined threshold value to form a waste stream containing the removed I