Thin film polymer blend membranes
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United States of America Patent
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Nov 10, 1987
Issued Date -
N/A
app pub date -
Aug 13, 1985
filing date -
Jun 1, 1984
priority date (Note) -
Expired
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Abstract
Gas separation membranes comprising an inorganic compound-organic polymer blend may be prepared by admixing an organic polymer such as poly(vinyl alcohol) with a phosphoric acid or sulfuric acid in a mutually miscible solvent. After allowing the mixture to proceed for a period of time sufficient to form a blend, the solution may be cast on an appropriate casting surface and, after the solvent has been evaporated, the desired membrane which may have a thickness of from about 0.1 to about 100 microns, is recovered.
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