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:
Nov. 26, 2019
Filed:
Mar. 28, 2014
Applicant:
Yava Technologies Inc., Toronto, CA;
Inventor:
Madhav Dahal, Toronto, CA;
Assignee:
Yava Technologies Inc., Toronto, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22B 3/14 (2006.01); C22B 3/00 (2006.01); C22B 15/00 (2006.01); C22C 5/02 (2006.01); C22C 5/06 (2006.01); C22C 9/00 (2006.01); C22C 11/00 (2006.01); C22C 18/00 (2006.01);
U.S. Cl.
CPC ...
C22B 3/14 (2013.01); C22B 11/04 (2013.01); C22B 11/044 (2013.01); C22B 11/046 (2013.01); C22B 13/04 (2013.01); C22B 13/045 (2013.01); C22B 15/0078 (2013.01); C22B 19/24 (2013.01); C22C 5/02 (2013.01); C22C 5/06 (2013.01); C22C 9/00 (2013.01); C22C 11/00 (2013.01); C22C 18/00 (2013.01); Y02P 10/234 (2015.11); Y02P 10/236 (2015.11);
Abstract
Described is a method of recovering a metal from a substrate having a metal sulphide, metal oxide, or combination thereof, by contacting the substrate with an aqueous oxidant to oxidize the metal sulphide to elemental sulphur and oxidized metal or convert the complex metal oxide to a metal salt, contacting the oxidized metal or simple metal oxide with ammonium hydroxide to form soluble a ammine complex of the metal to obtain a leachate and residual solids; separating the leachate from the residual solids; and recovering the metal.