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. 24, 2015
Filed:
Jun. 17, 2011
Alain Roy, Kingston, CA;
Boyd R. Davis, Kingston, CA;
Leslie James Bryson, Benoni, ZA;
Lloyd Robert Nelson, Johannesburg, ZA;
Stephen Farring Woollam, Johannesburg, ZA;
Victor Loyiso Vusumzi Mtotywa, Midrand, ZA;
Alain Roy, Kingston, CA;
Boyd R. Davis, Kingston, CA;
Leslie James Bryson, Benoni, ZA;
Lloyd Robert Nelson, Johannesburg, ZA;
Stephen Farring Woollam, Johannesburg, ZA;
Victor Loyiso Vusumzi Mtotywa, Midrand, ZA;
Rustenburg Platinum Mines Limited, Johannesburg, ZA;
Abstract
A process for upgrading a precious metals-containing concentrate or residue results in near-quantitave removal of base metals and several impurity elements at elevated temperatures. The precious metals-containing concentrate or residue is exposed to oxygen or an oxygen-containing environment in an oxidative pre-treatment step followed by treatment with a hydrochlorinating agent in a hydrochlorination step to form an upgraded concentrate or residue.