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:
Oct. 09, 2018
Filed:
Feb. 17, 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;
Yoshitomo Ozaki, Niihama, JP;
Kazuyuki Takaishi, Niihama, JP;
Hideki Ohara, Niihama, JP;
Tomoaki Yoneyama, Niihama, JP;
Osamu Ikeda, Niihama, JP;
Yohei Kudo, Niihama, JP;
Abstract
Provided is a method for producing fine nickel powder used as suitable seed crystals for producing nickel powder from a solution containing a nickel ammine sulfate complex. The method for producing nickel powder sequentially includes: a mixing step of adding, to a solution containing a nickel ammine sulfate complex, a dispersant containing a sulfonate and an insoluble solid which is insoluble in the solution to form a mixed slurry; a reduction and precipitation step of charging a reaction vessel with the mixed slurry and then blowing hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions contained in the mixed slurry to form nickel precipitate on a surface of the insoluble solid; and a separation step of separating the nickel precipitate on the surface of the insoluble solid from the surface of the insoluble solid to form nickel powder.