Process of preparing a permselective membrane

Details Process of preparing a permselective membrane Process of preparing a permselective membrane

1976-10-21

1978-05-02

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

210500M, 260 25N, 264 41, 264 49, C08J 926

Patent

active

040873889

ABSTRACT:
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 improved 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.

REFERENCES:
patent: 3483283 (1969-12-01), Fukushima et al.
patent: 3772072 (1973-11-01), Brown et al.
patent: 3816575 (1974-06-01), Susuki et al.

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