04830885 is referenced by 69 patents and cites 19 patents.

Chlorine-resistant semipermeable membranes which comprise an interfacial polymerized reaction product composite 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, said aqueous solution containing a polyhydric compound and an acid acceptor. The coated support material is then contacted with an organic solvent solution of an aromatic polycarboxylic acid halide for a period of time sufficient to form an interfacial polymerized reaction product on the surface of the support material. The resulting composite is then post treated by washing with an alkaline compound, leaching with sodium bisulfite and treating the leached composite with a polyhydric compound. The resultant membrane composite may be used in separation processes such as the desalination of brackish or sea water, trhe membrane being resistant to attack by chlorine which is present in the water.

Title
Chlorine-resistant semipermeable membranes
Application Number
7/59295
Publication Number
4830885
Application Date
June 8, 1987
Publication Date
May 16, 1989
Inventor
William G Light
San Diego
CA, US
Hong C Chu
San Diego
CA, US
Chinh N Tran
San Diego
CA, US
Agent
Raymond H Nelson
Thomas K McBride
Harold N Wells
Assignee
Allied Signal
NJ, US
IPC
B05D 5/00
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