Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1975-07-21
1977-03-15
Vertiz, Oscar R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423139, C01G 300, C01G 5100, C01G 5300
Patent
active
040124827
ABSTRACT:
A process for scrubbing extracted ammonia from oximes. The process is particularly adaptable as a secondary scrub, prior to acid stripping, in a process in which metals are recovered from ammoniacal leach liquors by solvent extraction. The present process eliminates the pH rise of the aqueous scrub liquor associated with acid scrubbing of ammonia from oximes into which ammonia has been extracted. Extractable metal sulfates are utilized in an aqueous scrub solution at a pH <7. The net result is an exchange of ammonia on the oxime for copper or nickel in the scrub solution with resulting loading of copper or nickel by the oxime and the formation of ammonium sulfate in the aqueous scrub solution with no change in the pH of the aqueous scrub solution.
REFERENCES:
patent: 3761249 (1973-09-01), Ritcey et al.
patent: 3794719 (1974-02-01), Lowenhaupt et al.
patent: 3853725 (1974-12-01), Skarbo
patent: 3855090 (1974-12-01), Skarbo
Natwig David L.
Skarbo Roald R.
Hearn Brian E.
Kennecott Copper Corporation
Lorusso Anthony M.
McCarter Lowell H.
Sniado John L.
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