Composite fluid separation membranes
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United States of America Patent
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Feb 21, 1989
Grant Date -
N/A
app pub date -
Aug 13, 1984
filing date -
Aug 13, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A composite fluid separation membrane having improved fluid permeabilities and a method for preparing same are disclosed. The composite fluid separation membrane is comprised of a porous support in the form of a flat sheet, tube or hollow fiber which is impregnated with a volatile solvent followed by the in situ formation of a separating layer wherein the preimpregnation of the pores of the porous support with the solvent provide a separating layer of substantially uniform thickness and minimum intrusion of the separating layer polymer into the pores of the porous support.
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