Chlorine-resistant semipermeable membranes

Details Chlorine-resistant semipermeable membranes Chlorine-resistant semipermeable membranes

1986-08-20

1988-09-20

Sever, Frank

Liquid purification or separation

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Material

55158, 428420, 4284744, B01D 1300

Patent

active

047723947

ABSTRACT:
Chlorine-resistant semipermeable membranes which comprise an interfacial polymerized reaction product composited on a porous support backing material may be prepared by contacting a porous support material such as polysulfone with an aqueous solution of an aromatic polyamine containing a chlorine substituent on the aromatic ring. The coated support material is then contacted with an organic solvent solution of 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 being resistant to attack by chlorine which is present in the water.

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