Production of aqueous metal hydroxide solutions of low metal hal

Details Production of aqueous metal hydroxide solutions of low metal hal Production of aqueous metal hydroxide solutions of low metal hal

1974-01-02

1976-01-27

Spear, Jr., Frank A.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

B01D 1300

Patent

active

039350967

ABSTRACT:
A cation-active permselective membrane of a hydrolyzed copolymer of a perfluorinated olefin and a fluorosulfonated perfluorovinyl ether, a modification thereof, or sulfostyrenated perfluorinated ethylene propylene copolymer is employed to dialytically pass metal hydroxide from an aqueous solution thereof containing metal halide halates, thereby purifying the metal hydroxide of the metal halide. The named cation-active permselective membrane materials resist deterioration by the halates, hydroxide and halide components of the solution being purified.
The invention also includes a dialysis cell for effecting the purification.

REFERENCES:
patent: 623918 (1899-04-01), Lang et al.
patent: 3041317 (1962-06-01), Gibbs et al.
patent: 3247133 (1966-04-01), Chen et al.
patent: 3257334 (1966-06-01), Chen et al.
patent: 3276996 (1966-10-01), Lazare
patent: 3297595 (1967-01-01), Mindick et al.
patent: 3423491 (1969-01-01), McLain et al.

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