Depuration of an aqueous solution containing vanadium and cobalt salts as impurities
Abstract
Abstract ACIDIFIED AMMONIUM PERSULFATE SPENT AS ETCHANT FOR VICALLOY (AN ALLOY CONTAINING COBALT, VANADIUM, AND IRON AND WHICH MAY ALSO CONTAIN SILICON AND MANGANESE) IS TREATED WITH AN IRON REAGENT FOR REDUCING PENTAVALENT VANADIUM AND TRIVALENT COBALT. THE SOLUTION IS THEN NEUTRALIZED TO THROW DOWN SUBSTANTIALLY ALL OF THE VANADIUM FROM THE SOLUTION AS INSOLUBLE SALTS OF TRIVALENT AND TETRAVALENT VANADIUM, AND TO REMOVE THE IRON AS IRON HYDROXIDE. THESES INSOLUBLE MATERIALS, TOGETHER WITH ANY SILICON DIOXIDE, ARE THEN SEPARATED FROM THE LIQUID. THE PH OF THE RESULTING LIQUID IS HIGHLY ALKALINIZED TO THROW OUT THEREFROM SUBSTANTIALLY ALL OF THE COBALT AND THE REMAINING IRON AS INSOLUBLE MATERIALS OF BIVALENT COVALT AND IRON HYDROXIDE. THSES LAST INSOLUBLE MATERIALS ARE THEN SEPARATED FROM THE LIQUID, WHICH IS THEREAFTER NEUTRALIZED.
Inventors
- 👤 E Songco
- 👤 M Burg
- 👤 L Carbonaro
Bibliographic Details
Claims Analysis
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