The Actinide-Lanthanide Separation Process
Journal Article
·
· Solvent Extraction and Ion Exchange, 32(4):333-347
The Actinide-Lanthanide SEParation (ALSEP) process is described. The process uses an extractant phase consisting of either N,N,N',N'-tetraoctyldiglycolamide (TODGA) or N,N,N',N'-tetra(2 ethylhexyl)diglycolamide (T2EHDGA) combined with 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (HEH[EHP]). The neutral TODGA or T2EHDGA serves to co-extract the trivalent actinide and lanthanide ions from nitric acid media. Switching the aqueous phase chemistry to a citrate buffered diethylenetriaminepentaacetic acid (DTPA) solution at pH 2.5 to 4 results in selective transfer of the actinides to the aqueous phase, thus resulting in separation of these two groups of elements.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1132670
- Report Number(s):
- PNNL-SA-97475; AF5805010
- Journal Information:
- Solvent Extraction and Ion Exchange, 32(4):333-347, Journal Name: Solvent Extraction and Ion Exchange, 32(4):333-347
- Country of Publication:
- United States
- Language:
- English
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