Title:
SCANDIUM OXIDE MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2017/038205
Kind Code:
A1
Abstract:
Provided is a scandium oxide manufacturing method, which is capable of manufacturing scandium oxide with limited sulfur component content when obtaining scandium oxide from scandium oxalate that comprises sulfur-containing compounds as impurities. This scandium oxide manufacturing method heats scandium oxalate that comprises sulfur-containing compounds as impurities in the presence of a carbon source. The amount of oxygen present when performing the heat treatment is preferably less than the amount necessary for oxidation of all of the carbon atoms contained in the carbon source to carbon dioxide. For the scandium oxalate, a precipitate obtained by adding oxalic acid to a sulfuric acid-acidified solution containing scandium is preferred. Said sulfuric acid-acidified solution is preferably a solution obtained by adding a neutralizing agent to a leachate obtained by leaching nickel oxide ore with sulfuric acid.
Inventors:
MATSUMOTO SHIN-YA (JP)
KOBAYASHI HIROSHI (JP)
NAGAI HIDEMASA (JP)
HIGAKI TATSUYA (JP)
KOBAYASHI HIROSHI (JP)
NAGAI HIDEMASA (JP)
HIGAKI TATSUYA (JP)
Application Number:
PCT/JP2016/067983
Publication Date:
March 09, 2017
Filing Date:
June 16, 2016
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C22B59/00; C01F17/212; C22B1/04; C22B3/08; C22B3/44
Domestic Patent References:
| WO2015115269A1 | 2015-08-06 |
Foreign References:
| JP2014218719A | 2014-11-20 | |||
| US20120204680A1 | 2012-08-16 |
Other References:
See also references of EP 3342887A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
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