Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1982-02-22
1986-04-15
Doll, John
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423139, 423DIG14, 75101BE, 75117, B01D 1100
Patent
active
045826897
ABSTRACT:
Improved solvent extraction processes for recovery of copper values from aqueous solutions which also contain dissolved iron values. In continuous, multiple stage, solvent extraction circuits, the overall copper/iron selectivity of reagents including hydroxy oxime extractants is enhanced by providing non-uniform residence times for aqueous feedstocks in extraction stages, i.e., longer effective residence times for the feedstocks in one or more initial extraction stages of contact with the reagent than in subsequent stages of contact with the reagent.
REFERENCES:
patent: 3479378 (1969-11-01), Orlandini
patent: 3927169 (1975-12-01), Goren
Chemistry and Industry, Sep. 3, 1977, pp. 706-718.
Ritcey, CIM Bulletin, Feb. 1974, pp. 87-92.
Doll John
Henkel Corporation
Stoll Robert L.
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