The separation of lanthanides and actinides in supercritical fluid carbon dioxide

Supercritical fluid carbon dioxide presents an attractive alternative to conventional solvents for recovery of the actinides and lanthanides. Carbon dioxide is a good solvent for fluorine and phosphate-containing ligands, including the traditional tributylphosphate ligand used in process-scale urani...

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Bibliographic Details
Published in:Journal of radioanalytical and nuclear chemistry 2016-03, Vol.307 (3), p.2543-2547
Main Authors: Mincher, Bruce J., Wai, Chien M., Fox, Robert V., Baek, Donna L., Yen, Clive, Case, Mary E.
Format: Article
Language:English
Subjects:
Carbon dioxide
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Fluorides
Hadrons
Heavy Ions
Inorganic Chemistry
Nuclear Chemistry
Nuclear industry
Nuclear Physics
Physical Chemistry
Uranium
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Summary:Supercritical fluid carbon dioxide presents an attractive alternative to conventional solvents for recovery of the actinides and lanthanides. Carbon dioxide is a good solvent for fluorine and phosphate-containing ligands, including the traditional tributylphosphate ligand used in process-scale uranium separations. Actinide and lanthanide oxides may even be directly dissolved in carbon dioxide containing the complexes formed between these ligands and mineral acids, obviating the need for large volumes of acids for leaching and dissolution, and the corresponding organic liquid–liquid solvent extraction solutions. Examples of the application of this novel technology for actinide and lanthanide separations are presented.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-015-4576-5