NICKEL POWDER PRODUCTION METHOD - KOCHI UNIVERSITY NAT UNIVERSITY CORP

Title:

NICKEL POWDER PRODUCTION METHOD

Document Type and Number:

WIPO Patent Application WO/2015/122535

Kind Code:

A1

Abstract:

Provided is a method for producing fine nickel powder suitable for use as a seed crystal in the production of nickel powder from a solution containing a nickel sulfate ammine complex. The production method for nickel powder is characterized by producing nickel powder by performing, in order: a mixing step in which a solution containing the nickel sulfate ammine complex has added thereto an insoluble solid that is insoluble in the solution, and a mixed slurry is formed; a reduction/precipitation step in which after the mixed slurry is introduced into a reaction tank, hydrogen gas is blown into the mixed slurry inside the reaction tank, nickel complex ions contained in the mixed slurry are reduced, and a nickel precipitate is formed on the surface of the insoluble solid; and a separation step in which the nickel precipitate on the surface of the insoluble solid is separated from the surface of the insoluble solid and nickel powder is formed.

Inventors:

YANAGISAWA KAZUMICHI (JP)
ZHANG JUNHAO (JP)
HEGURI SHIN-ICHI (JP)
OZAKI YOSHITOMO (JP)
TAKAISHI KAZUYUKI (JP)
OHARA HIDEKI (JP)
YONEYAMA TOMOAKI (JP)
IKEDA OSAMU (JP)
KUDO YOHEI (JP)

Application Number:

PCT/JP2015/054281

Publication Date:

August 20, 2015

Filing Date:

February 17, 2015

Export Citation:

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Assignee:

KOCHI UNIVERSITY NAT UNIVERSITY CORP (JP)
SUMITOMO METAL MINING CO (JP)

International Classes:

B22F9/26

Domestic Patent References:

WO2007004664A1

2007-01-11

Foreign References:

JP2005510625A	2005-04-21
JPH10219363A	1998-08-18

Other References: