Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1975-03-03
1977-01-25
Vertiz, Oscar R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423 32, 423 53, 423139, 423150, 75101BE, C01G 300, C01G 5100, C01G 5300
Patent
active
040051730
ABSTRACT:
Organic acids are added to ammoniacal leach liquors containing base metals such as copper, nickel and cobalt. Ammonia and carbon dioxide are then stripped from the leach liquor by heating the leach liquor sufficiently to drive off the ammonia and carbon dioxide. The resulting loss of ammonia and carbon dioxide causes the pH of the leach liquor to drop and enables the metal values to load onto the organic acid. Metal values are selectively stripped from the loaded organic acid.
REFERENCES:
patent: 3666446 (1972-05-01), Cook et al.
patent: 3718458 (1973-02-01), Ritcey et al.
Burger Organic Reagents in Metal Analysis Pergamon Press, Oxford, p. 69.
Fletcher et al. "Naphthenic Acid as a Liquid-Liquid Extraction Reagent for Metals" Inst. Mining & Metallurgy, England pp. 355-366 (1961).
Boldt et al., The Winning of Nickel, Longmans Canada Ltd. 1967 pp. 434, 435.
Litchfield John K.
Pemsler J. Paul
Hearn Brian E.
Kennecott Copper Corporation
Lorusso Anthony M.
McCarter Lowell H.
Sniado John L.
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