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:
Aug. 23, 1977
Filed:
Jun. 28, 1972
Applicant:
Inventors:
Roald R Skarbo, Lexington, MA (US);
Hal D Peterson, Boulder, CO (US);
Edmond A Morin, Aurora, CO (US);
Assignee:
Kennecott Copper Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C72B / ; C72B / ;
U.S. Cl.
CPC ...
204106 ; 204112 ; 7510 / ; 423 24 ; 423139 ;
Abstract
The present invention relates to a solvent extraction process for selectively recovering copper from an aqueous solution containing copper and nickel and having a pH above about 9. By employing only limited amounts of oxime, sufficient to provide about equivalent exchangeable hydrogen ion therein to latent copper ion of the aqueous stream, copper ion can be extracted in a multistage countercurrent process preferentially to nickel or cobalt. Hydrogen ion of the oxime molecule exchanges with copper ion in the aqueous solution in accordance with the equation: