Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1979-05-31
1981-06-09
Hearn, Brian E.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
204106, 204107, 156642, 156666, C01G 310
Patent
active
042724929
ABSTRACT:
A process for selectively extracting and ultimately recovering copper from acidic chloride solutions containing the same wherein an acidic chloride solution containing copper is initially contacted with an extractant to selectively extract copper, as copper chloride, therefrom. The loaded extractant is contacted with a suitable aqueous stripping solution to strip copper therefrom. Thereafter, the pregnant aqueous stripping solution is contacted with an active hydrogen ion exchange extractant, such as hydroxy oxime, a beta diketone or mixture thereof dissolved in an inert organic carrier solvent. The active hydrogen ion exchange extractant selectively extracts copper from the pregnant aqueous stripping solution with hydrochloric acid being formed. An aqueous acidic stripping solution is utilized to strip copper from the loaded hydrogen ion exchange extractant, the copper being recoverable from the pregnant aqueous acidic stripping solution as cathode copper by electrowinning and/or copper sulfate by crystallization. The hydrochloric acid formed during extraction of copper by the hydrogen ion exchange extractant is preferably neutralized to provide predetermined pH by the addition of a suitable base to efficiently and effectively utilize the hydrogen ion exchange extractant without any localized precipitation of copper.
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