SEPARATION OF SCANDIUM AND THORIUM FROM RARE EARTH MINERALS
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21610%2F24%3A00389541" target="_blank" >RIV/68407700:21610/24:00389541 - isvavai.cz</a>
Result on the web
—
DOI - Digital Object Identifier
—
Alternative languages
Result language
angličtina
Original language name
SEPARATION OF SCANDIUM AND THORIUM FROM RARE EARTH MINERALS
Original language description
In addition to a significant amount of thorium, uranium ores and the phosphorus mineral monazite also contain industrially usable amounts of rare earth elements - lanthanides, including scandium and yttrium. Similar variations have been identified following the recent announcement of the discovery of new lanthanide deposits in the Kiruna region of Sweden. The processing of such raw materials for the extraction of rare earth elements and scandium primarily requires the removal or isolation of radioactive thorium. This can be achieved by carbide of the raw material followed by the conversion of hydrolyzable carbides into soluble compounds, suitable for ion exchange separation. The possibility of thorium carbide formation by reaction with carbon at a temperature of 2200 degrees C using Spark plasma sintering was verified on a raw material from the Czech uranium deposit Jachymov. The temperature was sufficient only for the formation of Sc2OC and Sc4C3 carbides. The reaction of thorium dioxide present in the raw material to carbide occurred only when heated above 2500 degrees C in an Acheson-type microfurnace. After hydrolysis with the release of allylene, scandium was transferred to a solution whose radioactivity did not exceed the values for further safe processing permitted by the Office for Nuclear Safety SUJB.
Czech name
—
Czech description
—
Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
20501 - Materials engineering
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 11th International Conference on Chemical Technology
ISBN
978-80-88307-21-1
ISSN
2336-811X
e-ISSN
—
Number of pages
5
Pages from-to
148-152
Publisher name
Česká společnost chemická
Place of publication
Praha
Event location
Mikulov
Event date
Apr 15, 2024
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
001678797800025