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:
Dec. 31, 2019
Filed:
May. 30, 2017
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Kazuyuki Takaishi, Niihama, JP;
Shin-ichi Heguri, Niihama, JP;
Ryo-ma Yamaguma, Niihama, JP;
Yoshitomo Ozaki, Niihama, JP;
Yasuo Doi, Niihama, JP;
SUMITOMO METAL MINING CO., LTD., Tokyo, JP;
Abstract
A nickel sulfate amine complex liquid and nickel powder having a particle diameter of 0.1 μm to 300 μm are supplied to a reaction container, hydrogen gas is continuously supplied while the inside of the reaction container is maintained at 150° C. to 250° C., and the pressure is set to 2.5 MPa to 3.5 MPa, whereby nickel ions in the nickel sulfate amine complex liquid are reduced to nickel and deposited on the surfaces of the nickel powder supplied to the reaction container, a reacted slurry including the nickel sulfate amine complex liquid and the nickel powder is then transferred to a pressurized storage container at the same or slightly lower pressure than the internal pressure of the reaction container, and the pressure of the pressurized storage container to which the reacted slurry is transferred is then reduced, after which the reacted slurry is extracted from the pressurized storage container.