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. 06, 2018
Filed:
Jan. 27, 2015
Kochi University, National University Corporation, Kochi-shi, Kochi, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Kazumichi Yanagisawa, Kochi, JP;
Junhao Zhang, Kochi, JP;
Shin-ichi Heguri, Niihama, JP;
Hideki Ohara, Niihama, JP;
Osamu Ikeda, Niihama, JP;
Tomoaki Yoneyama, Niihama, JP;
Yohei Kudo, Niihama, JP;
Yoshitomo Ozaki, Niihama, JP;
KOCHI UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, Kochi-Shi, Kochi, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
Provided is a method for producing nickel powder from a nickel ammine sulfate complex solution, comprising treatment steps of: (1) a seed crystal production step of producing nickel powder having an average particle size of 0.1 to 5 μm; (2) a seed crystal addition step of adding the nickel powder obtained in the step (1) as seed crystals to form a mixed slurry; (3) a reduction step of forming a reduced slurry containing nickel powder formed by precipitation of a nickel component in the mixed slurry on the seed crystals; and (4) a growth step of performing solid-liquid separation to separate and recover the nickel powder as a solid phase component and then blowing hydrogen gas into a solution prepared by adding the nickel ammine sulfate complex solution to the recovered nickel powder to grow the nickel powder to form high purity nickel powder.