Chlorine-resistant semipermeable membranes
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United States of America Patent
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Apr 28, 1987
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N/A
app pub date -
May 23, 1985
filing date -
May 23, 1985
priority date (Note) -
Expired
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Abstract
Chlorine-resistant semipermeable membranes which comprise an interfacial polymerization reaction product composited on a porous backing support material may be prepared by contacting a porous support material such as polysulfone with an aqueous solution of triaryl triamine. The coated support material is then contacted with an organic solvent solution of an aromatic polycarboxylic acid chloride for a period of time sufficient to form an interfacial polymerized reaction product on the surface of the support material. The resultant membrane composite may be used in separation processes such as desalination of brackish or sea water, the membrane resistant to attack by chlorine which is present in the water.
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