Chlorine-resistant semipermeable membranes

Details Chlorine-resistant semipermeable membranes Chlorine-resistant semipermeable membranes

1985-05-23

1987-04-28

Spear, Frank

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

21050038, 21050039, B01D 1300

Patent

active

046612548

ABSTRACT:
Chlorine-resistant semipermeable membranes which comprise an interfacial polymerization reaction product composited on a porous backing support material may be prepared by contacting a porous support material such as polysulfone with an aqueous solution of triaryl triamine. The coated support material is then contacted with an organic solvent solution of an aromatic polycarboxylic acid chloride for a period of time sufficient to form an interfacial polymerized reaction product on the surface of the support material. The resultant membrane composite may be used in separation processes such as desalination of brackish or sea water, the membrane resistant to attack by chlorine which is present in the water.

REFERENCES:
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patent: 3600350 (1971-08-01), Kwolek
patent: 3710945 (1973-01-01), Dismore
patent: 3878109 (1975-04-01), Ikeda et al.
patent: 3904519 (1975-09-01), McKinney, Jr. et al.
patent: 3920612 (1975-11-01), Stephens
patent: 3951815 (1976-04-01), Wrasidlo
patent: 3993625 (1976-11-01), Kurihara et al.
patent: 4048144 (1977-09-01), Stephens
patent: 4277344 (1981-07-01), Cadotte
patent: 4302336 (1981-11-01), Kawaguchi et al.

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