Process for selective extraction of contaminant elements from mi

Details Process for selective extraction of contaminant elements from mi Process for selective extraction of contaminant elements from mi

1989-10-27

1991-08-13

Morris, Theodore

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 87, 75722, C22B 1500

Patent

active

050394967

ABSTRACT:
Prior art processes for removal of one or more contaminant elements, including at least one of antimony, bismuth, and arsenic and optionally including iron, from electrolyte solutions of primary metals by solvent extraction with an organic phase including a hydroxamic acid, then precipitating at least part of the contaminant elements from the organic phase as sulfides, are improved by an additional step of re-extracting the organic phase with water before precipitating the sulfides from it. At least part of any arsenic present and, if desired, part of any antimony as well, may be re-extracted in this manner and subsequently recovered if desired, so that the overall process is made more economical.

REFERENCES:
patent: 3464784 (1969-09-01), Swanson
patent: 3900551 (1975-08-01), Bardoncelli et al.
patent: 4061564 (1977-12-01), De Schepper et al.
patent: 4102976 (1978-07-01), Heimeleers et al.
patent: 4115512 (1978-09-01), Kerfoot
patent: 4503015 (1985-03-01), Marr et al.
patent: 4547346 (1985-10-01), Guerriero et al.
patent: 4834951 (1989-05-01), Schwab et al.
J. Chem. Research (S), 1982), 90 ff, Solvent Extraction of Metals by Versatohydroxamic Acid, Frederick Vernon, Natalino A. Banja and Mohmed O. B. Karrier.

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