Title:
METHOD FOR PREPARING ULTRAMICRO SCANDIUM OXIDE
Document Type and Number:
WIPO Patent Application WO/2020/062953
Kind Code:
A1
Abstract:
Disclosed is a method for preparing ultramicro scandium oxide, comprising: subjecting a solution containing scandium ions to an extraction treatment using a carboxylic acid extraction agent-organic solvent mixed solution to obtain a scandium-loaded organic phase, wherein the carboxylic acid extraction agent in the carboxylic acid extraction agent-organic solvent mixed solution is added excessively relative to the scandium ions in the solution containing scandium ions; mixing the scandium-loaded organic phase and an aqueous ammonia and subjecting same to a saponification reaction so as to form a water-oil emulsion; heating and drying the water-oil emulsion and subjecting same to a thermal hydrolysis reaction so as to obtain a scandium precipitate; and calcining the scandium precipitate to obtain the ultramicro scandium oxide. In the method, the extraction with the carboxylic acid extraction agent, the control for the shape and size of the scandium precipitate by a microreactor formed at the water-oil interface, combined with the acid-base regulation ability of the aqueous ammonia and the coating ability of the carboxylic acid extraction agent during a thermal hydrolysis reaction are used to effectively prepare a scandium oxide product which is ultramicro-scaled in size. The preparation method also has the characteristics of being simple and efficient, and is more conducive to industrial production.
Inventors:
WANG WEIWEI (CN)
DU SHANGCHAO (CN)
FU GUOYAN (CN)
LIU ZHAOBO (CN)
LI MINGCHUAN (CN)
DU SHANGCHAO (CN)
FU GUOYAN (CN)
LIU ZHAOBO (CN)
LI MINGCHUAN (CN)
Application Number:
PCT/CN2019/091718
Publication Date:
April 02, 2020
Filing Date:
June 18, 2019
Export Citation:
Assignee:
CHINA ENFI ENG CORP (CN)
International Classes:
C01F17/00; B82Y40/00
Foreign References:
| CN109133142A | 2019-01-04 | |||
| CN105793447A | 2016-07-20 | |||
| CN101602519A | 2009-12-16 | |||
| CN101781706A | 2010-07-21 | |||
| CN101289216A | 2008-10-22 | |||
| CN101289217A | 2008-10-22 |
Other References:
HUANG, GUIWEN ET AL.: "Technology in Extracting High Purity Sc203from Waste Slag from Refining Sc Metal", CHINESE RARE EARTHS, vol. 20, no. 3, 30 June 1999 (1999-06-30)
Attorney, Agent or Firm:
KANGXIN PARTNERS, P.C. (CN)
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