Membranes prepared via reaction of diazonium compounds or precur

Details Membranes prepared via reaction of diazonium compounds or precur Membranes prepared via reaction of diazonium compounds or precur

1987-08-10

1989-03-14

Spitzer, Robert

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210655, 2105003, 21050037, 21050038, B01D 1300

Patent

active

048122386

ABSTRACT:
An improved reverse osmosis membrane and process for making the same is described. The membrane is prepared by treating a polymer bearing primary amine groups with nitrous acid or a diazonium compound so as to react the resulting diazonium groups with other groups present. The resulting membrane possesses improved chlorine resistance. When the nitrous acid treatment is employed, the water flux of a polyamide membrane is frequently increased with little or no effect on the salt rejection of the membrane.

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The Condensed Chemical Dictionary, Tenth Edition, p. 476, Van Nostrand Reinhold Company (1981).
Chemical Abstract: 91:58115m.
Chemical Abstract: 93:27284c.
Chemical Abstract: 93:27283b.
Chemical Abstract: 99:124275g.
Chemical Abstract: 96:7408e.
Chemical Abstract: 92:182726w.
Chemical Abstract: 87:202397s.
Chemical Abstract: 91:153551j.
Chemical Abstract: 102:132956a.
Chemical Abstract: 86:51761g.
Chemical Abstract: 81:78952d.
Chemical Abstract: 77:102761f.
Chemical Abstract: 82:58953x.

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