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:
May. 26, 2015
Filed:
May. 11, 2007
Applicants:
David B. Dreisinger, Delta, CA;
Chris A. Fleming, Lakefield, CA;
Inventors:
David B. Dreisinger, Delta, CA;
Chris A. Fleming, Lakefield, CA;
Assignee:
International PGM Technologies, Delta, British Columbia, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B 11/00 (2006.01); C22B 3/00 (2006.01); C22B 3/10 (2006.01); C22B 15/00 (2006.01);
U.S. Cl.
CPC ...
C22B 11/04 (2013.01); C22B 3/10 (2013.01); C22B 15/0067 (2013.01); C22B 23/0415 (2013.01);
Abstract
The invention provides a recycling step in an oxidative pressure leaching process for recovery of metals using halide ions, in which a portion of the leached solids are recycled back to the feed to the autoclave, to allow two or more passes through the high temperature leaching step.