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Patent Searching and Data


Title:
MEMBRANE SOLVENT EXTRACTION PROCESS
Document Type and Number:
WIPO Patent Application WO/2012/156894
Kind Code:
A3
Abstract:
The invention discloses a metal extraction process and arrangement therefore which includes a microfiltration plant for removing suspended solids from a pregnant leach solution including a metal to form a first retentate including the solids and a first permeate including the metal; a nanofiltration plant for recovering acid from the first permeate to form a second retentate including the metal and a second permeate; a membrane solvent extraction unit for extracting the metal from the second permeate to form a third retentate being an organic phase including the metal and third permeate being an aqueous phase; a membrane acid strip unit for stripping the third retentate to form a fourth retentate and a fourth permeate including the metal; an acid recovering unit for recovering acid from the fourth permeate to form a fifth permeate and a fifth retentate including the metal which is treated in a metal recovering unit.

Inventors:
VAN DER WESTHUYSEN, Johannes, Petrus, Willem (The Vineyard Center Suite 100,cnr Adam Tas and Devon Valley Roads, Pty7600 Stellenbosch, ZA)
Application Number:
IB2012/052391
Publication Date:
November 22, 2012
Filing Date:
May 14, 2012
Export Citation:
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Assignee:
SYNEXUS (PTY) LTD (The Vineyard Center, Suite 100cnr Adam Tas and Devon Valley Roads, 7600 Stellenbosch, ZA)
VAN DER WESTHUYSEN, Johannes, Petrus, Willem (The Vineyard Center Suite 100,cnr Adam Tas and Devon Valley Roads, Pty7600 Stellenbosch, ZA)
International Classes:
B01D61/58; B01D11/04; B01D61/14; C22B3/20; C22B60/02
Foreign References:
US20100028226A12010-02-04
US6156186A2000-12-05
Attorney, Agent or Firm:
GERNTHOLTZ, Richard, Otto, Paul et al. (Dr Gerntholtz Inc, P.O. Box 8, 8000 Cape Town, ZA)
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