The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 2015
Filed:
Jun. 15, 2012
Applicants:
Yeonuk Choi, Oakville, CA;
Qiankun Wang, Pitt Meadows, CA;
John William Langhans, Jr., Spring Creek, NV (US);
Inventors:
Yeonuk Choi, Oakville, CA;
Qiankun Wang, Pitt Meadows, CA;
John William Langhans, Jr., Spring Creek, NV (US);
Assignee:
BARRICK GOLD CORPORATION, Toronto, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B 11/00 (2006.01); C22B 3/42 (2006.01); C22B 3/00 (2006.01);
U.S. Cl.
CPC ...
C22B 11/04 (2013.01); C22B 3/42 (2013.01);
Abstract
The present disclosure is directed to 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 sorbed trithionate to thiosulfate. The desorbed thiosulfate is contacted with an oxidant and converted to trithionate for eluant recycle.