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:
Dec. 04, 2018
Filed:
Mar. 17, 2016
Applicant:
Outotec (Finland) Oy, Espoo, FI;
Inventor:
Mika Haapalainen, Pori, FI;
Assignee:
OUTOTEC (FINLAND) OY, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B 11/00 (2006.01); C22B 3/00 (2006.01); C01G 7/00 (2006.01); C22B 3/26 (2006.01); C22B 3/44 (2006.01); C22B 5/00 (2006.01);
U.S. Cl.
CPC ...
C22B 11/042 (2013.01); C01G 7/003 (2013.01); C22B 3/0009 (2013.01); C22B 3/44 (2013.01); C22B 5/00 (2013.01); C22B 11/00 (2013.01); C22B 11/04 (2013.01);
Abstract
A method is disclosed for recovering gold from a gold-containing organic solution containing soluble gold. The method comprises contacting the gold-containing organic solution with an aqueous stripping solution in order to extract gold from the gold-containing organic solution into the aqueous stripping solution. The aqueous stripping solution containing gold is separated from the organic solution. The separated aqueous stripping solution containing gold is contacted with a reducing agent containing sodium metabisulphite, in order to reduce gold from the aqueous stripping solution.