Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
Method for producing high-purity scandium oxide
Document Type and Number:
Japanese Patent JP6358299
Kind Code:
B2
Abstract:
Provided is a method for efficiently obtaining high-purity scandium oxide from a solution containing scandium. This method for producing high-purity scandium oxide comprises: a first firing step S12 in which an oxalate conversion process is carried out using oxalic acid in a solution containing scandium, and scandium oxalate crystals thereby obtained are fired at a temperature of 400°C to 600°C; a dissolution step S13 in which sulfuric acid is added to the scandium compound obtained by firing to obtain a solution; a reprecipitation step S14 in which an oxalate conversion process is carried out using oxalic acid in the solution, and a reprecipitation product of scandium oxalate is generated; and a second firing step S15 in which the reprecipitation product of scandium oxalate that was obtained is fired to obtain scandium oxide.

Inventors:
Tatsuya Higaki
Kobayashi Sora
Application Number:
JP2016172697A
Publication Date:
July 18, 2018
Filing Date:
September 05, 2016
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
Sumitomo Metal Mining Co., Ltd.
International Classes:
C22B59/00; C22B1/02; C22B3/08; C22B3/44
Domestic Patent References:
JP2016153534A
JP9176756A
JP2010222613A
Foreign References:
WO2016125386A1
Attorney, Agent or Firm:
Masayuki Masabayashi
Hayashi Ichiyoshi