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:
Apr. 11, 1978
Filed:
Nov. 20, 1975
Applicant:
Inventors:
Gale L Hubred, Lexington, MA (US);
Roger N Kust, Acton, MA (US);
David L Natwig, Brighton, MA (US);
J Paul Pemsler, Lexington, MA (US);
Assignee:
Kennecott Copper Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G / ; C01G / ; C01G / ;
U.S. Cl.
CPC ...
423 24 ; 423 32 ; 423 49 ; 423139 ; 423150 ; 423D / ;
Abstract
After the non-cobalt values are stripped from the co-loaded organic, the cobalt ions on the organic are reduced to the divalent state. The organic loaded with divalent cobalt ions is easily stripped with a dilute acid to render the organic recyclable. In another embodiment of the invention simultaneous reduction and 'crowding' is utilized to strip cobalt from the organic. In this embodiment, a convenient source of both reductant Cu.sup.+ and of copper and/or nickel such as pregnant leach liquor is used to crowd the reduced cobalt from the organic.