초록 ▼

Novel semiperimeable membranes and thin film composite (TFC) gas separation membranes useful in the separation of oxygen, nitrogen, hydrogen, water vapor, methane, carbon dioxide, hydrogen sulfide, lower hydrocarbons, and other gases are disclosed. The novel semipermeable membranes comprise the poly

Novel semiperimeable membranes and thin film composite (TFC) gas separation membranes useful in the separation of oxygen, nitrogen, hydrogen, water vapor, methane, carbon dioxide, hydrogen sulfide, lower hydrocarbons, and other gases are disclosed. The novel semipermeable membranes comprise the polycondensation reaction product of two complementary polyfunctional compounds, each having at least two functional groups that are mutually reactive in a condensation polymerization reaction, and at least one of which is selected from siloxanes, alkoxsilyls and aryloxysilyls. The TFC membrane comprises a microporous polymeric support, the surface of which has the novel semipermeable film formed thereon, preferably by interfacial polymerization.

대표청구항 ▼

A thin-film composite separation membrane comprising a microporous polymeric support having a thin polymeric semipermeable film formed on the surface of said support, said film comprising the polycondensation reaction product of two complementary polyfunctional compounds, at least one of which is se

A thin-film composite separation membrane comprising a microporous polymeric support having a thin polymeric semipermeable film formed on the surface of said support, said film comprising the polycondensation reaction product of two complementary polyfunctional compounds, at least one of which is selected from a group consisting essentially of siloxanes, alkoxysilanes, and aryloxysilanes, each of said complelemtary polyfunctional compounds having at least two functional groups selected from a member of Group A or Group B: ________________________________ - Group A Group B ________________________________ －COX －NHRh －SO2X －OH －NCO －SH －POXRo －NRhCOX ________________________________ where X is halide; Ro is selected from alkyloxy and substituted alkyloxy containing 1 to 18 carbons in the carbon chain, alkyl and substituted alkyl containing from 1 to 18 carbons in the carbon chain, cycloakyl, substituted cycloalkyl, and substituted heterocycloalkyl, aryl and substituted aryl; Rh is selected from hydrogen and Ro; provided that when said at least two functional groups are selected from group A for one of said complementary polyfunctional compounds, said at least two functional groups are selected from group B for the other of said complementary polyfunctional compounds, and vice-versa; and further provided that when at least one of said complementary polyfunctional compounds is a siloxane and the functional group from group A is －NCO, the functional group from group B is not －NHRh. A method for the separation of oxygen and nitrogen comprising splitting a feed stream containing oxygen and nitrogen with the thin-film composite separation membrane of claims 11, 15, 20, or 21 into an oxygen-rich permeate stream and a nitrogen-rich residue