Title:
PROCESS FOR PRODUCING NICKEL POWDER
Document Type and Number:
WIPO Patent Application WO/2017/038589
Kind Code:
A1
Abstract:
Provided is a production process by which a so-called high-purity nickel powder made up of coarse particles and reduced in the content of impurities, in particular, in sulfur content, is produced from a nickel sulfate ammine complex solution using a fine nickel powder.
This process is for producing a nickel powder from a nickel sulfate solution, and is characterized by conducting the following treatment steps (1) to (4): (1) a hydroxylation step in which a sediment of nickel hydroxide is yielded; (2) a complexation step in which a mixed slurry comprising a nickel sulfate ammine complex solution, seed crystals, and the nickel hydroxide is formed; (3) a reduction step in which a reduction slurry containing a nickel powder formed by the deposition of nickel matter on the seed crystals is formed; and (4) a solid-liquid separation step in which the reduction slurry formed in the reduction step (3) is subjected to solid-liquid separation to recover the nickel powder and a reduction end liquid.
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Inventors:
OZAKI YOSHITOMO (JP)
HEGURI SHIN-ICHI (JP)
HEGURI SHIN-ICHI (JP)
Application Number:
PCT/JP2016/074694
Publication Date:
March 09, 2017
Filing Date:
August 24, 2016
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
B22F9/26; C22B1/16; C22B3/08; C22B3/44; C22B23/00
Foreign References:
| JP2015140480A | 2015-08-03 | |||
| JP2003147570A | 2003-05-21 | |||
| JP2005194156A | 2005-07-21 |
Other References:
See also references of EP 3345701A4
Attorney, Agent or Firm:
OSHIDA Yoshitaka (JP)
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