Semi-permeable membranes prepared via reaction of cationic group

Details Semi-permeable membranes prepared via reaction of cationic group Semi-permeable membranes prepared via reaction of cationic group

1987-08-17

1989-01-10

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

2041809, 2041811, 2041814, 204296, 427245, 427301, 427333, 521 27, 521 28, 521 31, 521 32, 521 33, C05B 700

Patent

active

047971878

ABSTRACT:
A novel composite membrane and methods of making the membrane are described. The discriminating layer of the membrane is prepared by reaction of a reactive cationic compound group with a compound bearing a nucleophilic moiety. At least one of the reactants bears an average of two or more reactive groups. The reaction product contains covalent bonds formed via charge eliminating reactions.
In a preferred embodiment of the invention, the nucleophilic group is anionic and a coacervate is formed initially on a microporous substrate. The resulting membrane may be useful for reverse osmosis, gas or ultrafiltration separations.

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