Process for opening reverse osmosis membranes

Details Process for opening reverse osmosis membranes Process for opening reverse osmosis membranes

1992-12-30

1993-11-16

Spear, Frank

Liquid purification or separation

Processes

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

210654, 21050038, B01D 6110

Patent

active

052620549

ABSTRACT:
The salt passage of a reverse osmosis membrane is increased by: (a) contacting the membrane with ions to form a membrane-ion complex; (b) treating the membrane-ion complex with an aqueous solution of an alkali metal permanganate to form manganese dioxide crystals in the membrane; and (c) dissolving the manganese dioxide crystals. The process can be repeated any number of times to further open the membrane.

REFERENCES:
patent: 4259183 (1981-03-01), Cadotte
patent: 4277344 (1981-07-01), Cadotte
patent: 4769148 (1988-09-01), Fibiger et al.
patent: 4828700 (1989-05-01), Fibiger et al.
patent: 4938872 (1990-07-01), Strantz et al.

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