Semipermeable membrane compositions
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United States of America Patent
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Apr 24, 1990
Grant Date -
N/A
app pub date -
Oct 21, 1985
filing date -
Oct 21, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Semipermeable membranes which may be used in a variety of separation processes such as desalination, sugar separation, etc. are prepared by contacting a porous support backing material such as polysulfone with an aqueous solution of a hydrazine compound. The coated support material is then contacted with an organic solution of an aromatic polycarboxylic acid chloride whereby an interfacial polymerized condensation reaction product is formed on the surface of the support. The thus formed composite is then cured at an elevated temperature and recovered.
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