METHOD FOR PRODUCING NICKEL POWDER HAVING LOW CARBON CONCENTRATION AND LOW SULFUR CONCENTRATION

Title:

METHOD FOR PRODUCING NICKEL POWDER HAVING LOW CARBON CONCENTRATION AND LOW SULFUR CONCENTRATION

Document Type and Number:

WIPO Patent Application WO/2015/159846

Kind Code:

A1

Abstract:

Provided is a production method for reducing the content grades of sulfur and carbon, which are impurities contaminating a nickel powder, for the purpose of improving the quality of a nickel powder produced employing a complexing reduction process. A method for producing a nickel powder having a low carbon concentration and a low sulfur concentration, said method being characterized by comprising: carrying out a complexing treatment, wherein the complexing treatment comprises adding a complexing agent to an aqueous nickel sulfate solution to produce a solution containing nickel complex ions; blowing a hydrogen gas into the solution containing nickel complex ions while maintaining the solution at a liquid temperature of 150 to 250ºC in a pressure container to achieve hydrogen reduction, thereby producing a nickel powder; washing the nickel powder with water; and roasting the washed product under a nitrogen/hydrogen mixed gas atmosphere.

Inventors:

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

Application Number:

PCT/JP2015/061358

Publication Date:

October 22, 2015

Filing Date:

April 13, 2015

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)

International Classes:

B22F9/26; B22F1/00; C22B23/06; C22C19/03

Domestic Patent References:

WO2008001741A1

2008-01-03

Foreign References:

JPS4974160A	1974-07-17
JP2003514111A	2003-04-15
JPH10509213A	1998-09-08

Other References: