Patent ID: 7776137

Claim:
A method of producing a fluid separation membrane, said method comprising the steps of: (a) providing a polyimide polymer that comprises a plurality of first repeating units of a formula (I), wherein said formula (I) is: in which R 1 of said formula (I) is a moiety having a composition selected from the group consisting of a formula (A), a formula (B), a formula (C), and mixtures thereof, wherein said formula (A), said formula (B), and said formula (C) are: and in which R 2 of said formula (I) is a moiety having a composition selected from the group consisting of a formula (Q), a formula (S), a formula (T), and mixtures thereof, wherein said formula (Q), said formula (S), and said formula (T) are: in which Z of said formula (T) is a moiety having a composition selected from the group consisting of a formula (L), a formula (M), a formula (N), and mixtures thereof, wherein said formula (L), said formula (M), and said formula (N) are: (b) providing a molecular sieve material; (c) synthesizing a concentrated suspension, wherein said concentrated suspension comprises a solvent, said polyimide polymer, and said molecular sieve material dispersed therein; and (d) forming a membrane, wherein the molecular sieve material is dispersed within a continuous phase of the polyimide polymer.