Patent ID: 7025804

Claim:
A method for processing a feed, said method comprising: (a) providing a selectively permeable membrane wherein said membrane comprises a first side and a second side, wherein said membrane further comprises at least one polymer or copolymer comprising a repeating unit of formula (I): in which R 2 is a moiety having a composition formula (C), in which Z is a moiety having a composition formula (M), and in which R 1 is a moiety having a composition selected from the group consisting of formula (Q), formula (S), formula (T), and mixtures thereof, b) contacting said first side of said membrane with a gaseous feed mixture of at least two or more gas components; c) causing at least one component of said gaseous feed mixture to selectively permeate through the membrane, thereby forming on said second side of said membrane a permeate composition which has a concentration of at least one component that is greater than the concentration of said gaseous feed mixture; d) removing from said second side of said membrane said permeate composition; and e) withdrawing from said first side of said membrane a composition, which has a concentration of at least one component that is less than the concentration of said gaseous feed mixture.