Method for recovering acids from an aqueous solution of the acid

Details Method for recovering acids from an aqueous solution of the acid Method for recovering acids from an aqueous solution of the acid

1986-11-07

1988-08-23

Spear, Frank

Liquid purification or separation

Processes

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

210644, 21050023, B01D 1300

Patent

active

047659050

ABSTRACT:
A method for recovering acids from an aqueous solution of a mixture of the acids and metal salts by dialysis, characterized in that a fluorinated anion exchange membrane made of a copolymer having repeating units of the formula: ##STR1## wherein X is F or CF.sub.3, l is an integer of from 0 to 5, m is 0 or 1, n is an integer of from 1 to 5, p/q is from 2 to 16, and Y is a quaternary ammonium group, is used as a dialysis membrane.

REFERENCES:
patent: 3272737 (1966-09-01), Hansen et al.
patent: 4132682 (1979-01-01), Seita et al.

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