C - Chemistry – Metallurgy – 08 – J
Patent
C - Chemistry, Metallurgy
08
J
18/14
C08J 9/28 (2006.01) B01D 67/00 (2006.01) B01D 71/58 (2006.01)
Patent
CA 1099462
ABSTRACT OF THE DISCLOSURE The water flux rate (i.e., rate of water flow) through an aromatic nitrogen-linked synthetic organic polymer membrane in separation processes, such as reverse osmosis, is improves by incorporating a selected non-ionic, anionic or ampholytic surfactant into the rinse medium used to quench and extract salts and solvent from the membrane during preparation. The surfactant can be, inter alia, a water-soluble polyethylene glycol ester. The surfactant is effective in improving water flux in amounts ranging from between about 50 p.p.m. to about 10,000 p.p.m. based on rinse medium.
288998
Applegate Lynn E.
Jensen James H.
E. I. Du Pont de Nemours And Company
Mccallum Brooks & Co.
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