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Title:
METHOD FOR PRODUCING NICKEL POWDER
Document Type and Number:
WIPO Patent Application WO/2019/123972
Kind Code:
A1
Abstract:
Provided is a production method whereby coarse particles of a so-called high-purity nickel powder, which contains a small amount of impurities and, in particular, has a low sulfur content, are formed from a nickel sulfate ammine complex solution with the use of a fine nickel powder. The method for producing a nickel powder is characterized by comprising the following treatment steps (1) to (6) in a process for forming a nickel powder from a nickel sulfate solution: (1) a hydroxylation step; (2) a complexation step; (3) a reduction step; (4) a solid/liquid separation step; (5) a nickel recovery step for returning the recovered nickel powder to step (2) and/or step (3) and sulfurating the recovered reduction end solution followed by solid/liquid separation to thereby give nickel sulfide and a post-nickel recovery solution; and (6) a nickel regeneration step for oxidatively leaching the nickel sulfide obtained in step (5) and returning the obtained nickel sulfate solution to step (1).

Inventors:
HEGURI SHIN-ICHI (JP)
TAKAISHI KAZUYUKI (JP)
Application Number:
JP2018/043216
Publication Date:
June 27, 2019
Filing Date:
November 22, 2018
Export Citation:
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Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
B22F9/26; B22F9/24; C22B3/14; C22B3/44; C22B23/00
Domestic Patent References:
WO2015125650A12015-08-27
Foreign References:
JP2015140480A2015-08-03
JPS48000022A
JP2017155319A2017-09-07
JP2005240164A2005-09-08
JP2010242143A2010-10-28
JP2005350766A2005-12-22
Other References:
POWDER METALLURGY, 1958, pages 40 - 52
Attorney, Agent or Firm:
OSHIDA Yoshitaka (JP)
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