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Title:
METHOD FOR PRODUCING NICKEL POWDER
Document Type and Number:
WIPO Patent Application WO/2016/117138
Kind Code:
A1
Abstract:
Provided is a method for producing a nickel powder, whereby it becomes possible to produce a fine nickel powder, which can serve as seed crystals needed for the production of a nickel powder, in an amount needed for the production of the desired nickel powder from a solution containing a nickel sulfate-ammine complex. A method for producing a nickel powder through: a mixing step of adding insoluble solids that serve as seed crystal and a polyacrylic acid salt or a ligninsulfonic acid salt that serves as a dispersing agent to a nickel sulfate-ammine complex solution to form a mixed slurry; and a subsequent reduction/precipitation step of charging the mixed slurry in a reaction vessel, and then blowing a hydrogen gas into the mixed slurry in the reaction vessel to reduce nickel complex ions in the slurry, thereby forming nickel precipitates on the surfaces of the insoluble solids. The method is characterized in that the amount of the dispersing agent to be added in the mixing step is controlled to control the number of nickel granules produced by the production of the nickel precipitates in the reduction/precipitation step.

Inventors:
HEGURI Shin-ichi (SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
OZAKI Yoshitomo (SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
TAKAISHI Kazuyuki (SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
YONEYAMA Tomoaki (SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
OHARA Hideki (SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
IKEDA Osamu (SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
KUDO Yohei (SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
Application Number:
JP2015/059451
Publication Date:
July 28, 2016
Filing Date:
March 26, 2015
Export Citation:
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Assignee:
SUMITOMO METAL MINING CO., LTD. (11-3, Shimbashi 5-chome Minato-k, Tokyo 16, 〒1058716, JP)
International Classes:
B22F9/26; B22F3/10; B22F9/24
Foreign References:
JPH10509213A1998-09-08
JP2010053409A2010-03-11
JP2006152344A2006-06-15
Attorney, Agent or Firm:
OSHIDA Yoshitaka (Ginza bldg, 3-12 Ginza 3-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
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