Semipermeable thin-film membranes comprising siloxane, alkoxysil

Details Semipermeable thin-film membranes comprising siloxane, alkoxysil Semipermeable thin-film membranes comprising siloxane, alkoxysil

1987-07-16

1988-11-01

Spitzer, Robert

Gas separation

Means within gas stream for conducting concentrate to collector

55 68, 55 73, 55158, B01D 5322

Patent

active

047817330

ABSTRACT:
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.

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