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US 2015/0175438 A1Published application
Method for producing aqueous solutions of cobalt sulphate
AssigneeBASF SE
InventorsSimon Schroedle, Oliver Wagner
Life of this patent
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Abstract
Process for preparing an aqueous cobalt sulfate solution having a pH of at least 4, wherein (a) metallic cobalt is dissolved in aqueous sulfuric acid in an atmosphere of low-oxygen air, of hydrogen or of inert gas and (b) the resulting acidic cobalt sulfate solution is treated with oxygen, oxygen-comprising gas or with a substance which can release oxygen in an aqueous medium.
Claims14
A process for preparing an aqueous cobalt sulfate solution having a pH of at least 4, the process comprising:
- (a) dissolving metallic cobalt in aqueous sulfuric acid in an atmosphere of hydrogen, of inert gas or of a nitrogen/oxygen mixture which comprises nitrogen and oxygen in a volume ratio of from 6:1 to 100:1, thereby obtaining an acidic cobalt sulfate solution, and
- (b) treating the acidic cobalt sulfate solution with oxygen, oxygen-comprising gas or a substance releasing oxygen in an aqueous medium.
Dependencies are inferred from the claim text.