Patent ID: 6402952
Filing Date: 2002-06-11
Classification: B01D,B09C,C02F

Abstract:
An apparatus for extraction of at least one chemical from an aquifer remediation aqueous effluent, comprising:a first extraction vessel configured to operate under a first temperature and first pressure so as to selectively remove an organic contaminant from the aqueous effluent when contacted by a critical fluid; a second extraction vessel in fluid communication with the first extraction vessel, the second extraction vessel configured to operate under a second temperature and second pressure so as to selectively remove a surfactant from the aqueous effluent when contacted by a critical fluid; a third extraction vessel in fluid communication with the second extraction vessel, the third extraction vessel configured to operate under a third temperature and third pressure so as to selectively remove an alcohol from the aqueous effluent when contacted by a critical fluid; and a critical fluid feed line in fluid communication with each of the first, second, and third extraction vessel.