Recovery of non-ferrous metals from acidic liquors with a chelat

Details Recovery of non-ferrous metals from acidic liquors with a chelat Recovery of non-ferrous metals from acidic liquors with a chelat

1975-08-04

1976-12-21

Vertiz, Oscar R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Radioactive metal

423 24, 423 63, 423100, 423139, 260 22R, C01G 900, C01G 4300, C01G 300, C01G 5300

Patent

active

039989240

ABSTRACT:
The recovery of non-ferrous transition metals such as copper and nickel from acidic hydrometallurgical leach liquors with a 2-picolylamine chelate exchange resin is improved by the in situ reduction of Fe.sup.+.sup.3 present in the leach liquor with a water soluble reducing agent during the resin loading cycle. The chelate resin functions not only as a selective sorbent for the desired metal values, but also as a catalyst for the in situ reduction of Fe.sup.+.sup.3 to Fe.sup.+.sup.2. A suitable reducing agent such as SO.sub.2 or HCHO is fed into the chelate resin column with the leach liquor. When the loading cycle is completed, regeneration with sulfuric acid gives an enriched eluent with a high non-ferrous metal:Fe ratio. For example, using SO.sub.2 with a copper leach liquor feed, subsequent regeneration at about 70.degree. C gives better than 90 percent recovery of the copper as a highly enriched copper sulfate solution with a Cu:Fe ratio of about 10,000.

REFERENCES:
patent: 2980607 (1961-04-01), Mock et al.
patent: 3109732 (1963-11-01), Goven
patent: 3214239 (1965-10-01), Hazen et al.
patent: 3475163 (1969-10-01), Watson et al.
patent: 3669651 (1972-06-01), Spedden et al.
patent: 3868439 (1975-02-01), Wadsworth
patent: 3873668 (1975-03-01), Melby
Chem Abstracts vol. 64, 1966 No. 93006.

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