Modification of copper/iron selectivity in copper solvent extraction systems
AssigneeCytec Technology Corp.
InventorsOwen Tinkler, Keith Cramer, Peter Tetlow, John Campbell, Charles Maes
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Abstract
A solvent extraction composition comprising one or more orthohydroxyarylaldoximes and/or one or more orthohydroxyarylketoximes, and one or more selectivity modifiers consisting of phosphinic and/or phosphonic acids, and salts and esters therefore and optionally one or more equilibrium modifiers is provided.
Claims21
A solvent extraction composition comprising one or more orthohydroxyarylaldoximes and/or one or more orthohydroxyarylketoximes, and one or more selectivity modifiers consisting of phosphinic and/or phosphonic acids, and salts and esters therefore and optionally one or more equilibrium modifiers.
A process for the extraction of a metal from solution in which an acidic solution containing a dissolved metal is contacted with a solvent extraction composition, whereby at least a fraction of the metal is extracted into the organic solution, characterised in that the solvent extraction composition comprises a water immiscible organic solvent, one or more orthohydroxyarylaldoximes and/or one or more orthohydroxyarylketoximes, and one or more selectivity modifiers selected from phosphinic and/or phosphonic acids, and salts and esters therefore and optionally one or more equilibrium modifiers.
Dependencies are inferred from the claim text.