Purified nickel solutions using successive solvent extractions

Abstract

Methods of recovering a nickel salt are disclosed. The method includes removing one or more impurities from an aqueous leach solution including cobalt, manganese, and nickel salts to produce a first purified aqueous solution including the cobalt, manganese, and nickel salts. The method includes extracting the cobalt and manganese salts from the first purified aqueous solution in a first liquid-liquid extraction step using a first organic extractant to produce an aqueous raffinate solution including the nickel salt and a first loaded organic solution including the cobalt and manganese salts. The method further includes extracting the nickel salt from the aqueous raffinate solution in a second liquid-liquid extraction step using a second organic extractant to produce a second loaded organic solution including the nickel salt. Systems for recovering a nickel salt are also disclosed.

Dependencies are inferred from the claim text.