Surfactant treatment of polyimide gas separation membranes

Details Surfactant treatment of polyimide gas separation membranes Surfactant treatment of polyimide gas separation membranes

B - Operations, Transporting

01

D

183/1, 18/14

B01D 67/00 (2006.01) B01D 69/08 (2006.01) B01D 71/56 (2006.01) C11D 1/66 (2006.01)

Patent

CA 2027005

TITLE SURFACTANT TREATMENT OF POLYARAMIDE GAS SEPARATION MEMBRANES ABSTRACT OF THE DISCLOSURE A process for improving the permselectivity of asymmetric polyaramide gas separation membranes is disclosed. The process involves contacting the membrane with a dilute solution of a surfactant in a solvent which preferably swells the membrane material. The surfactants are anionic, nonionic or amphoteric with the fluorinated nonionic surfactants being preferred.

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