Treatment of composite polyamide membranes with compatible oxida

Details Treatment of composite polyamide membranes with compatible oxida Treatment of composite polyamide membranes with compatible oxida

1989-12-13

1990-10-02

Sever, Frank

Liquid purification or separation

Processes

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

210651, 210652, 21050038, B01D 6102

Patent

active

049605186

ABSTRACT:
A reverse osmosis membrane having improved rejection of sulfuric acid and/or isopropanol is described. The membrane is prepared by treating a crosslinked, polyamide discriminating layer with a compatible oxidizing reagent, such as peracetic acid, periodic acid or chloramine, whereby the passage through the treated membrane of sulfuric acid in a 2 percent aqueous solution at a transmembrane pressure of 400 psi is reduced by at least 30 percent.

REFERENCES:
patent: 4814399 (1989-03-01), Sansune et al.

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