Title:
ION EXCHANGING RESINS FOR GOLD CYANIDE EXTRACTION
Document Type and Number:
WIPO Patent Application WO2002028529
Kind Code:
A3
Abstract:
Ion exchange resins composed of a polymeric matrix functionalized with a piperazine group are suitable for separating gold cyanide from aqueous medium containing gold cyanide complex and other metal cyanide complexes in a process wherein the gold cyanide complex is preferentially retained on the piperazine-functionalized ion exchange resin and can be eluted with thiourea or a mixture of NaOH in ethanol. The polymeric matrix is preferably based on a polystyrene copolymer or on a polymethacrylate copolymer and the piperazine group is preferably the 4-(2'-hydroxyethyl)piperazin-1-yl group.
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Inventors:
WARSHAWSKY ABRAHAM (IL)
CORTINA JOSE-LUIS PALLAS (ES)
KAUTZMANN RUBENS MULLER (BR)
CORTINA JOSE-LUIS PALLAS (ES)
KAUTZMANN RUBENS MULLER (BR)
Application Number:
PCT/IL2001/000914
Publication Date:
July 04, 2002
Filing Date:
September 30, 2001
Export Citation:
Assignee:
YEDA RES & DEV (IL)
UNIV CATALUNYA POLITECNICA (ES)
WARSHAWSKY ABRAHAM (IL)
CORTINA JOSE-LUIS PALLAS (ES)
KAUTZMANN RUBENS MULLER (BR)
UNIV CATALUNYA POLITECNICA (ES)
WARSHAWSKY ABRAHAM (IL)
CORTINA JOSE-LUIS PALLAS (ES)
KAUTZMANN RUBENS MULLER (BR)
International Classes:
B01J39/00; B01J41/04; B01J41/14; C01G5/00; C01G7/00; C22B11/08; (IPC1-7): B01J41/04; C01G7/00; C22B3/00; B01J41/14
Domestic Patent References:
| WO1987002273A1 | 1987-04-23 | |||
| WO1995018159A1 | 1995-07-06 |
Foreign References:
| DE4128837A1 | 1993-03-04 | |||
| DD245368A1 | 1987-05-06 | |||
| DD245592A1 | 1987-05-13 | |||
| US4758413A | 1988-07-19 | |||
| GB670975A | 1952-04-30 | |||
| US5134169A | 1992-07-28 |
Other References:
DATABASE COMPENDEX [online] ENGINEERING INFORMATION, INC., NEW YORK, NY, US; YI-YONG CHEN ET AL: "Synthesis and properties of 1-(2-aminoethyl)piperazine resin used in the sorption of the platinum group and gold ions", XP002196317, Database accession no. EIX95102507511
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