Title:
METHODS FOR IMPROVING THE RECOVERY OF METAL LEACHING AGENTS
Document Type and Number:
WIPO Patent Application WO2005012581
Kind Code:
A3
Abstract:
Processes for metal leaching/solvent extraction are described which comprise: (a) providing a first aqueous leach pulp which comprises a mixture of leached solids and an aqueous leach solution comprising a metal, a leaching agent and water; (b) subjecting the first aqueous leach pulp to a first solid-liquid separation to provide a first clarified aqueous leach solution and a second aqueous leach pulp, wherein the second aqueous leach pulp comprises the leached solids at a % solids level greater than the first pulp; (c) subjecting the first clarified aqueous leach solution to a first solvent extraction prior to any significant dilution, whereby a first aqueous raffinate is obtained; (d) subjecting the second aqueous leach pulp to a second solid-liquid separation with dilution via an aqueous stream to obtain a second clarified aqueous leach solution; and (e) subjecting the second clarified aqueous leach solution to a second solvent extraction whereby a second aqueous raffinate is obtained.
Inventors:
KORDOSKY GARY A (US)
NISBETT ANDREW (US)
NISBETT ANDREW (US)
Application Number:
PCT/US2004/024112
Publication Date:
July 07, 2005
Filing Date:
July 27, 2004
Export Citation:
Assignee:
COGNIS CORP (US)
KORDOSKY GARY A (US)
NISBETT ANDREW (US)
KORDOSKY GARY A (US)
NISBETT ANDREW (US)
International Classes:
B01D11/00; C22B3/26; C22B11/08; C22B15/00; C22B19/00; C22B23/00; C22B; (IPC1-7): B01D11/00; C22B15/00; C22B19/00; C22B23/00
Foreign References:
| US5895633A | 1999-04-20 | |||
| US5919674A | 1999-07-06 | |||
| US5316567A | 1994-05-31 | |||
| US6171564B1 | 2001-01-09 |
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