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. 27, 2006
Filed:
Oct. 25, 2002
Applicants:
Kenneth N. Han, Rapid City, SD (US);
Peter Nam-soo Kim, Rapid City, SD (US);
Inventors:
Kenneth N. Han, Rapid City, SD (US);
Peter Nam-soo Kim, Rapid City, SD (US);
Assignee:
South Dakota School of Mines and Technology, Rapid City, SD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention relates to the recovery of platinum group metals and, more particularly, to the recovery of platinum group metals from various sources by roasting the source material with one or more of sulfuric acid, a sulfate and/or a bi-sulfate and with one or more halogen salt. The roasted product is put in contact with a leaching solution to dissolve at least a portion of the platinum group metals, which then may be separated and recovered.