Solvent Extraction and Ion Exchange · 1984 · 124 citations · 1 references
EngineeringChemical EngineeringChemistryInorganic ChemistrySeparation ProcessesSeparation ScienceExtraction TechniquesMetal RecoverySolvent ExtractionHydrolytic StabilityLow SolubilityMetal Ion ExtractionNickel ExtractionNickel RemovalNickel SolubilitySelective Solvent ExtractionSolvent Extraction Chemistry
Abstract The use of an organophosphinic acid to separate cobalt from nickel by solvent extraction is described. Comparative data indicate that the phosphinic acid is superior to analagous phosphoric and phosphonic acids in terms of cobalt-nickel selectivity and the ability to reject calcium. Important reagent properties, such as low aqueous solubility and hydrolytic stability, are discussed. The results of continuous, counter-current, mini-plant tests demonstrate the recovery of high purity cobalt from concentrated nickel sulphate solutions.
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