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Patent Searching and Data


Title:
METHOD FOR RECOVERING PRECIOUS METALS AND COPPER FROM LEACH SOLUTIONS
Document Type and Number:
WIPO Patent Application WO/2012/174349
Kind Code:
A3
Abstract:
A process for recovering a precious metal from a pregnant leach solution using a resin extractant. The precious metal is eluted from the loaded resin using an eluant comprising trithionate. The barren resin is contacted with a sulfide, bisulfide, and/or polysulfide to convert sorted trithionate to thiosulfate. The desorbed thiosulfate is contacted with an oxidant and converted to trithionate for eluant recycle.

Inventors:
CHOI, Yeonuk (1353 Sagewood Crescent, Oakville Ontario, L6M 4A4, 4A4, CA)
WANG, Qiankun (11237 Tully Crescent, Pitt Meadows, BC V3Y 2V9, 2V9, CA)
LANGHANS, John, William (337 Ashburn Place, Spring Creek, NV, 89815, US)
Application Number:
US2012/042615
Publication Date:
December 20, 2012
Filing Date:
June 15, 2012
Export Citation:
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Assignee:
BARRICK GOLD CORPORATION (BCE Place, Canada Trust Tower161 Bay Street, Suite 3700,Toront, Ontario M5J 2S1, 2S1, CA)
CHOI, Yeonuk (1353 Sagewood Crescent, Oakville Ontario, L6M 4A4, 4A4, CA)
WANG, Qiankun (11237 Tully Crescent, Pitt Meadows, BC V3Y 2V9, 2V9, CA)
LANGHANS, John, William (337 Ashburn Place, Spring Creek, NV, 89815, US)
International Classes:
C22B3/24
Foreign References:
US6344068B12002-02-05
US20110132147A12011-06-09
US20110011216A12011-01-20
US5536297A1996-07-16
US5340380A1994-08-23
Other References:
See also references of EP 2721185A4
Attorney, Agent or Firm:
SWARTZ, Douglas, W. (Sheridan Ross P.C, 1560 Broadway Suite 120, Denver CO, 80202, US)
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