Extractant-surfactant post-treatments of permselective composite

Details Extractant-surfactant post-treatments of permselective composite Extractant-surfactant post-treatments of permselective composite

1986-04-23

1988-01-12

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

210490, 21050038, 264232, 264340, 264344, C08J 942, C08J 928

Patent

active

047190620

ABSTRACT:
A treatment process for treating an interfacially polymerized polyaramide on a microporous support reverse osmosis membrane. The treatment involves immersing the membrane in an aqueous solution containing 5 to 25 weight percent of an alcohol having 1-5 carbon atoms for 15 minutes to two hours at a pressure of 50 to 100 psi. Optionally, the membrane can be treated with a surfactant.

REFERENCES:
patent: 3808303 (1974-04-01), Ganci et al.
patent: 4262094 (1981-04-01), Johnson
patent: 4272467 (1981-06-01), Johnson
patent: 4277344 (1981-07-01), Cadotte
patent: 4471110 (1984-09-01), Christell
patent: 4481260 (1984-11-01), Nohmi
patent: 4520044 (1985-05-01), Sundet
patent: 4529646 (1985-07-01), Sundet

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