Solvent extraction process

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal

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C01G 4300

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active

050248219

ABSTRACT:
A metal extraction process in which an aqueous leach solution containing metal values is contacted with a solution, in a water-immiscible organic solvent, of an extracting agent where the aqueous leach solution contains a wetting agent in a concentration of not more than 0.1% by weight. Wetting agents which may be used include alkoxylated alcohols or phenols, especially alcohols condensed with both ethylene oxide and propylene oxide, and ethylene oxide/propylene oxide/ethylene oxide block copolymers. The wetting agent can be present at a concentration of 0.00001% w/v or less. The presence of the wetting agent may reduce the build up of solid as crud and/or may reduce entrainment of one phase in the other.

REFERENCES:
patent: 3224873 (1965-12-01), Swanson
patent: 4032332 (1977-06-01), Gerlach
patent: 4427640 (1984-01-01), Bowerman
C. J. King, Separation Processes, 2d edition, pp. 633-634 (McGraw-Hill 1980).

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