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. 28, 2015
Filed:
Nov. 19, 2012
Applicant:
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C01G 53/10 (2006.01); C22B 3/04 (2006.01); C22B 3/26 (2006.01); C22B 3/00 (2006.01); H01M 10/30 (2006.01);
U.S. Cl.
CPC ...
C22B 23/0469 (2013.01); C01G 53/10 (2013.01); C22B 3/0005 (2013.01); C22B 23/0453 (2013.01); H01M 10/30 (2013.01);
Abstract
Provided is a production method for obtaining high purity nickel sulfate having low levels of impurities, particularly low levels of magnesium and chloride, by adjusting the concentration of an extractant and the pH concentration at the time of treatment in a process of obtaining a nickel sulfate solution having a high nickel concentration by solvent extraction using an acidic organic extractant.