04950404 is referenced by 73 patents and cites 4 patents.

High flux semipermeable membranes which comprise a polymerized reaction product within and/or on a porous support may be prepared by contacting the porous support such as a polysulfone sheet with an aqueous solution of an polyamine, said aqueous solution containing a polar aprotic solvent not reactive with amines and optionally an acid acceptor. The surface of the coated support is dried to the touch and then contacted with an organic solution of an polycarboxylic acid halide for a period of time sufficient to form a polymerized reaction product within and/or on the surface of the support material. The resulting composite may be post treated by washing with an alkaline compound. The resultant membrane composite may be used in separation processes such as the desalination of brackish or seawater, or the softening of domestic hard water.

Title
High flux semipermeable membranes
Application Number
7/400440
Publication Number
4950404
Application Date
August 30, 1989
Publication Date
August 21, 1990
Inventor
Michael M Chau
San Diego
CA, US
Agent
Gerard P Rooney
Harold N Wells
Assignee
Allied Signal
NJ, US
IPC
B01D 69/00
B01D 67/00
B01D 61/00
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