Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1989-06-07
1990-07-03
Spear, Frank
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
21050038, 210654, B01D 1300
Patent
active
049388720
ABSTRACT:
A process for increasing the salt passage of polyamide reverse osmosis membranes and the resulting membrane is disclosed. The process involves treating the membrane with a dilute aqueous solution of an alkali metal permanganate followed by a stabilization treatment with a dilute aqueous solution of sodium bisulfite or hydrogen peroxide.
REFERENCES:
patent: 3911080 (1975-10-01), Mehl et al.
Brehm Warren J.
Strantz, Jr. John W.
E. I. Du Pont de Nemours and Company
Spear Frank
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