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Title: 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 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. As a result, examples of the application of this novel technology for actinide and lanthanide separations are presented.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [2] ;  [3]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Univ. of Idaho, Moscow, ID (United States)
  3. Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Idaho, Moscow, ID (United States)
Publication Date:
OSTI Identifier:
1326222
Report Number(s):
INL/JOU--15-35727
Journal ID: ISSN 0236-5731; PII: 4576
Grant/Contract Number:
AC07-05ID14517
Type:
Accepted Manuscript
Journal Name:
Journal of Radioanalytical and Nuclear Chemistry
Additional Journal Information:
Journal Volume: 307; Journal Issue: 3; Journal ID: ISSN 0236-5731
Publisher:
Springer
Research Org:
Idaho National Laboratory, Idaho Falls, ID (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS actinides; carbon dioxide; fuel cycle; lanthanides; separations; supercritical fluid