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:
Nov. 12, 2013
Filed:
Feb. 02, 2010
Hiroshi Kobayashi, Niihama, JP;
Hirofumi Shoji, Niihama, JP;
Norihisa Toki, Niihama, JP;
Keiji Kudo, Niihama, JP;
Tatsuya Higaki, Niihama, JP;
Hiroshi Kobayashi, Niihama, JP;
Hirofumi Shoji, Niihama, JP;
Norihisa Toki, Niihama, JP;
Keiji Kudo, Niihama, JP;
Tatsuya Higaki, Niihama, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Abstract
A method for recovering nickel from sulfuric acid aqueous solution, for recovering nickel in an effectively utilizable form as a raw material of nickel industry material, by separating efficiently impurity elements of iron, aluminum, manganese, etc., from the sulfuric acid aqueous solution containing nickel and cobalt, and the impurity elements, iron, aluminum, manganese, etc. The method comprises the following steps: subject the sulfuric acid aqueous solution to oxidation neutralization treatment; then subject the solution to neutralization treatment, and separate and recover mixed hydroxides containing nickel and cobalt; subject the mixed hydroxides to dissolution treatment in a sulfuric acid solution having a concentration of equal to or higher than 50% by mass; subject the concentrated solution to solvent extraction treatment, using a phosphate ester-based acidic extraction agent; add a neutralizing agent to the resultant extraction residual liquid; subject the solution to the neutralization treatment, and separate and recover nickel hydroxide generated.