Method for producing cobaltic hexammine compounds and cobalt metal powder
AssigneeGTE Products Corporation
InventorsRichard G. W. Gingerich, Robert P. McClintic
Life of this patent
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Abstract
Cobalt is recovered by treating aqueous solutions containing ammonia and cobalt ions with a sufficient amount of an acid in the presence of a catalyst to convert the cobalt ions to a cobalt hexammine ion which is precipitated and separated from the resulting solution. According to another aspect of the invention, a cobalt compound is precipitated from an aqueous solution of cobaltic hexammine halide by treating the solution with a metallic hydroxide and the precipitate is subsequently reduced to form fine cobalt powder.
Claims14
A method for recovering a cobaltic hexammine halide from an aqueous solution containing cobalt ions and ion impurities comprising complexing said cobalt ions with ammonia in the presence of a catalyst to form cobaltic hexammine ions, treating said solution with an acid in the presence of halide ions to form a cobaltic hexammine halide precipitate, and removing said precipitate from said solution and ion impurities.
A method for producing fine particle size cobalt metal powder comprising complexing cobalt ions present in an aqueous solution with ammonia in the presence of a catalyst to form a cobaltic hexammine ion, treating said solution with an acid in the presence of halide ions to form a cobaltic hexammine halide precipitate, removing said precipitate from said solution and impurities, dissolving said precipitate in an aqueous solution to form a relatively pure solution thereof, treating said relatively pure solution with a sufficient amount of a metallic hydroxide to form a cobalt containing precipitate, and reducing said cobalt containing precipitate to form fine particles of cobalt.
Dependencies are inferred from the claim text.