Production of aqueous metal hydroxide solutions of low metal...

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

B - Operations, Transporting

01

D

182/13

B01D 23/00 (1980.01)

Patent

CA 1056735

PRODUCTION OF AQUEOUS METAL HYDROXIDE SOLUTIONS OF LOW METAL HALIDE CONCENTRATION ABSTRACT OF THE DISCLOSURE 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. - 1 -

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