Title:
METHOD FOR PRODUCING SCANDIUM OXIDE
Document Type and Number:
WIPO Patent Application WO/2016/208489
Kind Code:
A1
Abstract:
Provided is a method for producing scandium oxide that makes it possible to produce scandium oxide having a suppressed sulfur content when obtaining scandium oxide from scandium oxalate containing sulfur compounds as impurities. The method for producing scandium oxide according to the present invention includes a first heating step for heating scandium oxalate containing sulfur-containing compounds as impurities in an oxygen-free atmosphere and a second heating step for further heating the heated product obtained by the first heating step in an atmosphere in which oxygen is present. The scandium oxalate used in this production method is, for example, a precipitate obtained by adding oxalic acid to a sulfuric acid acidic solution containing scandium. Additionally, a solution obtained by adding a neutralizing agent to a leachate obtained by leaching nickel oxide ore by sulfuric acid can be used as the sulfuric acid acidic solution.
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Inventors:
HIGAKI TATSUYA (JP)
KOBAYASHI HIROSHI (JP)
NAGAI HIDEMASA (JP)
MATSUMOTO SHIN-YA (JP)
KOBAYASHI HIROSHI (JP)
NAGAI HIDEMASA (JP)
MATSUMOTO SHIN-YA (JP)
Application Number:
PCT/JP2016/067981
Publication Date:
December 29, 2016
Filing Date:
June 16, 2016
Export Citation:
Assignee:
SUMITOMO METAL MINING CO (JP)
International Classes:
C01F17/212; C22B3/08; C22B3/20; C22B59/00
Foreign References:
| JP2005082462A | 2005-03-31 | |||
| JP2005219938A | 2005-08-18 | |||
| JP2014012901A | 2014-01-23 | |||
| JP2014001430A | 2014-01-09 | |||
| JP2014177391A | 2014-09-25 |
Other References:
See also references of EP 3312144A4
Attorney, Agent or Firm:
SHOBAYASHI, Masayuki et al. (JP)
Right wood Masayuki (JP)
Right wood Masayuki (JP)
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