Title:
MANUFACTURING METHOD OF HIGH PURITY SCANDIUM OXIDE
Document Type and Number:
Japanese Patent JP2020147809
Kind Code:
A
Abstract:
To provide a method of efficiently obtaining high purity scandium oxide from a solution containing scandium.SOLUTION: A manufacturing method of high purity scandium oxide according to present invention includes steps of: first firing S12 for applying an oxalation treatment with oxalic acid to a solution containing scandium and firing the obtained crystal of scandium oxalate at a temperature of 400°C or higher and 800°C or lower; dissolving S13 for obtaining a solution by dissolving a scandium compound obtained by firing in sulfuric acid; extracting S14 for extracting impurity elements by contacting the solution and an extraction agent; oxalation treatment S15 for generating scandium oxalate by applying oxalation treatment by adding oxalic acid to an extraction residue; and second firing S15 for obtaining scandium oxide by firing scandium oxalate.SELECTED DRAWING: Figure 1
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Inventors:
HIRAGORI SHINICHI
WATANABE HIROTO
HIGAKI TATSUYA
WATANABE HIROTO
HIGAKI TATSUYA
Application Number:
JP2019047577A
Publication Date:
September 17, 2020
Filing Date:
March 14, 2019
Export Citation:
Assignee:
SUMITOMO METAL MINING CO
International Classes:
C22B59/00; C01F17/00; C01F17/17; C22B1/02; C22B3/08; C22B3/28; C22B3/44
Domestic Patent References:
| JP2018040020A | 2018-03-15 | |||
| JP2016108664A | 2016-06-20 | |||
| JP2018035391A | 2018-03-08 | |||
| JP2018035440A | 2018-03-08 | |||
| JP2018111858A | 2018-07-19 |
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Ichiyoshi
Hayashi Ichiyoshi