Patent ID: 6444011
Filing Date: 2002-09-03
Classification: B01D,C07C,Y02C,Y02P

Abstract:
A process for the separation and recovery of at least one perfluorocompound gas from a gas mixture containing at least one carrier gas and at least one perfluorocompound gas, said process comprising the steps of:(a) compressing a gas mixture contaning at least one carrier gas and at least one perfluorocompound gas; (b) heating said gas mixture to a temperature sufficient to selectively increase permeation of said at least one carrier gas; (c) contacting said gas mixture with one or more cascade connected membrane units which permeate said at least one carrier gas faster than said at least one perfluorocompound gas to obtain a permeate stream rich in said at least one carrier gas and a non-permeate stream rich in said at least one perfluorocompound gas; (d) passing said non-permeate steam to an adsorption system to produce an adsorbed stream comprising one or more adsorbed species and a non-adsorbed stream comprising one or more non-adsorbed species; and (e) recovering said adsorbed stream.