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Title:
METHOD FOR PRODUCING SEED CRYSTAL OF COBALT POWDER
Document Type and Number:
WIPO Patent Application WO/2017/073392
Kind Code:
A1
Abstract:
Provided is a production method for efficiently obtaining a cobalt powder by means of a process which increases the reduction reaction efficiency during the production of the cobalt powder from a solution that contains a sulfuric acid cobalt ammine complex. A method for producing a seed crystal of a cobalt powder, which is characterized by sequentially performing: a complexing step for obtaining a solution containing a sulfuric acid cobalt ammine complex by adding ammonia and/or a solution of an ammonia compound into a cobalt sulfate solution; a mixing step for obtaining mixed slurry by adding a solid material into the solution containing a sulfuric acid cobalt ammine complex obtained in the complexing step; a reduction/deposition step for obtaining a cobalt powder slurry containing a cobalt deposit, in which the cobalt component is deposited, as a cobalt powder, on the solid material surface, by introducing the mixed slurry obtained in the mixing step into a reactor and reducing cobalt contained in the mixed slurry by blowing a hydrogen gas into the reactor; and a solid-liquid separation step for obtaining the cobalt deposit and the liquid after the reduction by subjecting the cobalt powder slurry obtained in the reduction/deposition step to solid-liquid separation.

Inventors:
IKEDA Osamu (SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
YAMAGUMA Ryo-ma (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)
HEGURI Shin-ichi (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)
DOI Yasuo (SUMITOMO METAL MINING CO. LTD., 17-5, Isoura-cho, Niihama-sh, Ehime 02, 〒7920002, JP)
Application Number:
JP2016/080690
Publication Date:
May 04, 2017
Filing Date:
October 17, 2016
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
Foreign References:
JPS329051B1
JPH08503999A1996-04-30
US4761177A1988-08-02
US3775098A1973-11-27
Other References:
W.KUNDA ET AL.: "THE REDUCTION OF COBALT FROM ITS AQUEOUS AMMINE AMMONIUM SULPHATE SYSTEM USING HYDROGEN UNDER PRESSURE", HYDROMETALLURGY, vol. 4, no. 4, 1979, pages 347 - 375, XP055380158
See also references of EP 3369499A4
Attorney, Agent or Firm:
OSHIDA Yoshitaka (Ginza bldg, 3-12 Ginza 3-chome, Chuo-k, Tokyo 61, 〒1040061, JP)
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