Gas separation membrane

Details Gas separation membrane Gas separation membrane

1993-03-30

1994-10-18

Spitzer, Robert

Gas separation: apparatus

Apparatus for selective diffusion of gases

Hollow fiber or cylinder

96 13, 55524, B01D 5322, B01D 6912, B01D 7168

Patent

active

053564618

ABSTRACT:
A multilayer membrane for separating gas mixtures includes a polymer supporting membrane with a voids volume of more than 50% and a coating of two or more separating layers made of two or more different polymers. A hollow capillary serving as the supporting membrane is guided through the central bore of a spinneret. The spinneret has one or several concentric annular slits and/or annular grooves, through each of which a solution of one of the polymers forming the separating layers is applied to the supporting membrane. The spinneret terminates in a sealed chamber in which the solvent or solvents of the polymer solutions is/are evaporated and removed. The coated supporting membrane is drawn out of the chamber and wound up, possibly following aftertreatment with heat and/or liquids.

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patent: 5085676 (1992-02-01), Ekiner et al.
patent: 5178940 (1993-01-01), Matsumoto et al.

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