Method of producing manganese sulfate solutions of improved purity
AssigneeKerr-McGee Chemical Corporation
InventorsWilliam C. Laughlin, Virgil J. Barczak, Paul D. Bowerman, Theodore A. Rado
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Abstract
A process for the preparation of manganese sulfate solutions having reduced levels of potassium impurity comprising blending a reduced manganese ore, an added source of water soluble aluminum ions and an aqueous acid solution to form a digestion mixture, digesting said mixture, preferably in the presence of crystals of a complex potassium-aluminum salt to form a mixed reaction product containing a liquid phase of manganese sulfate solution and recovering the liquid phase of manganese sulfate solution from said mixed reaction product.
Claims10
A process for producing manganese sulfate solutions containing low levels of soluble potassium impurity from manganese ores containing potassium impurity, said solutions being suitable for use in the manufacture of electrolytic manganese dioxide comprising:
- A. blending a reduced manganese ore, an added source of water soluble aluminum ions and an aqueous acid solution selected from the group consisting of aqueous sulfuric acid and spent aqueous electrolyte containing sulfuric acid to form a digestion mixture having a pH of at least about 4.0,
- B. digesting said mixture at temperatures sufficient to form a mixed reaction product comprising a liquid phase of manganese sulfate solution and a solid phase of an admixture of digested ore residue and a particulate complex potassium-aluminum salt byproduct, and
- C. recovering said liquid phase of manganese sulfate solution from said mixed reaction product.
Dependencies are inferred from the claim text.