Albany International Corporation

Union Carbide Industrial Gases Technology Corporation

Praxair Technology, Inc.

Gertrud Gotz

Benjamin Bikson

Yurdagul F Ozcayir

Myron J Coplan

Joyce K Nelson

James H Kawakami

The present invention relates to composite membranes and membranes which are formed from modified poly(phenylene oxide) polymers having improved film forming properties and separation characteristics. The present invention further relates to poly(phenylene oxide) polymer and modified poly(phenylene oxide) polymer, having improved membrane forming characteristics and processes for producing the same.

Modified poly(phenylene oxide) based membranes for enhanced fluid

Semipermeable membranes comprised of certain sulfonated substituted polysulfone polymers containing the polymer repeat unit (A) or (B) as herein defined. The invention also pertains to processes for using said membranes for the selective permeation of at least one gaseous component from a mixture of gases containing said gaseous component in admixture with other gaseous components.

Semipermeable membranes based on certain sulfonated substituted

Sulfonated hexafluoro bis-A-polysulfone membranes of polymers and copolymers having the repeat unit of the structure; ##STR1## in the polymer molecule that exhibit improved permeation and separation characteristics and processes for the use thereof for separation of a component from a fluid mixture of said component in admixture with other components.

Sulfonated hexafluoro bis-a polysulfone membranes and process for fluid

Novel chlorosulfonated polyarylethersulfones derived by controlled treatment with chlorosulfonic acid of difficultly sulfonatable polyarylethersulfone of recurring units of the formula: ##STR1## wherein Ar.sub.1 and Ar.sub.2 represent phenylene or phenylene substituted with non-deactivating groups where Ar.sub.1 and Ar.sub.2 may be the same or different are described with the method of their preparation. The partially sulfonated-sulfochlorinated polyarylethersulfones may be subsequently converted to cation-exchange materials or ion-exchange materials with mixed cation and anion exchange sites.

Compositions and method of preparation by chlorosulfonation of

Novel sulfonated polyarylethersulfones are derived by heterogeneous sulfonation of polymer/solvent intercrystallites of difficultly sulfonatable polyarylethersulfones in chlorinated hydrocarbon solvents with a sulfonation agent.

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Brookline, MA, United States of America

Gertrud Gotz