Patent ID: 9108141
Filing Date: 2015-08-18
Classification: B01D,B01J

Abstract:
1. A device for purging unwanted substances from air, the device comprising: a frame comprising a first opening for receiving untreated air, a second opening for discharging treated air, and a passageway extending between the first opening and the second opening; a discrete acid-purging stage disposed across the passageway for purging acid from the untreated air received through the first opening of the frame, the acid-purging stage comprising (i) an air-permeable skeleton comprising an open cell foam, and (ii) an acid-neutralizing substance mounted to the open cell foam and adapted to neutralize acid in the untreated air received through the first opening; and a discrete solvent-purging stage disposed across the passageway downstream of the discrete acid-purging stage for purging solvent from the acid-purged air exiting the discrete acid-purging stage and discharging the acid-purged and solvent-purged air out the second opening without passing the acid-purged and solvent-purged air back through the discrete acid-purging stage, wherein the solvent-purging stage comprises solvent-purging granules captured between two air-permeable screens.