Metallurgical extractant system
First Claim
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1. An extractant system useful for the selective extraction of cobalt, copper or nickel metal values present in an aqueous acidic ore leach liquor containing more than one metal value, said extractant system comprising:
- (a) an alkylaromatic sulfonic acid having a molecular weight of at least about 400,(b) a chelating amine having a pKa in the range from about 3 to about 9 selected from the group consisting of picolylamines, oxazoles, benzoxazoles, pyridyl imidazoles and picolinic acid amides and esters, anda water-immiscible diluent for (a) and (b).
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Abstract
An extractant system comprising (a) a high molecular weight alkylaromatic sulfonic acid and (b) a chelating amine having a pKa of from about 3 to about 9 in a solvent which is essentially immiscible with water, said system being useful for the selective extraction of desired metals, e.g., cobalt, nickel or copper ions from aqueous acidic ore leach liquors.
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Citations
9 Claims
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1. An extractant system useful for the selective extraction of cobalt, copper or nickel metal values present in an aqueous acidic ore leach liquor containing more than one metal value, said extractant system comprising:
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(a) an alkylaromatic sulfonic acid having a molecular weight of at least about 400, (b) a chelating amine having a pKa in the range from about 3 to about 9 selected from the group consisting of picolylamines, oxazoles, benzoxazoles, pyridyl imidazoles and picolinic acid amides and esters, and a water-immiscible diluent for (a) and (b). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification