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OwnerR. Brantley Sudderth, Stephen Olafson +2inventors
InventorsR. Brantley Sudderth, Stephen Olafson, Phillip Mattison, Michael Virnig
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A low viscosity water insoluble extraction reagent composition according to the invention is comprised of: (a) an extractant selected from the group consisting of an aldoxime, a ketoxime, or a combination thereof; (b) an equilibrium modifier having a Brookfield viscosity of equal to or less than about 5 centapoise at 25° C. and a flash point equal to or greater than about 141° F. wherein the molar ratio of modifier to extractant is from about 0.05 to about 2.0 so as to provide a net copper transfer greater than that achieved in the absence of modifier. Such low viscosity extractants afford higher recoveries of copper, permit reduced equipment size such as smaller mixers and settlers and the use of reduced amounts of less overall organic inventory.
A water insoluble extraction reagent composition comprising:
A process for recovery of copper from an aqueous solution containing copper values comprising (1) contacting the aqueous solution with an organic phase comprising a water insoluble and water immiscible solvent solution of an extraction reagent composition comprising:
A method of making a low viscosity extraction reagent comprising adding to an extractant selected from the group consisting of an aldoxime, a ketoxime or a modifier having a Brookfield viscosity of equal to or less than about 5 centapoise at 25° C. and a flash point equal to or greater than about 141° F. wherein the molar ratio of modifier to extractant is from about 0.05 to about 2.0 so as to provide a net copper transfer greater than that achieved in the absence of modifier.
Dependencies are inferred from the claim text.