B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
117/88.5
B01D 67/00 (2006.01) B01D 69/08 (2006.01) B01D 69/10 (2006.01) B01D 69/12 (2006.01) B01D 69/14 (2006.01) B01D 71/40 (2006.01) B01D 71/44 (2006.01) B01D 71/46 (2006.01) B01D 71/52 (2006.01) B01D 71/68 (2006.01) B01D 71/72 (2006.01) B01D 71/80 (2006.01) B01D 71/82 (2006.01) C08J 5/22 (2006.01)
Patent
CA 1298739
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. C-28,369C
521001
Davis Thomas E.
Fibiger Richard F.
Kau Jee I.
Pickelman Dale M.
Schmidt Donald L.
Smart & Biggar
The Dow Chemical Company
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