Extraction of lanthanides from acidic solution using tributyl phosphate modified supercritical carbon dioxide
- Japan Atomic Energy Research Inst., Ibaraki-Ken (Japan)
The feasibility of using supercritical carbon dioxide as a substitute extraction solvent in nuclear reprocessing was tested by the extraction of lanthanide ions from acidic solution. Lanthanides were extracted from 6 M HNO[sub 3]-3 M LiNO[sub 3] solutions using tributyl phosphate- (TBP-) modified CO[sub 2]. Synergistic effects were also investigated using a combination of thenoyltrifluoroacetone (TTA) and TBP-modified CO[sub 2] as the extractant. It was found that near-quantitative extraction of Sm[sup 3+], Eu[sup 3+], Gd[sup 3+], and Dy[sup 3+] was achieved while the extraction efficiencies for La[sup 3+], Ce[sup 3+], Yb[sup 3+], and Lu[sup 3+] were much lower. The light lanthanides extracted as Ln(NO[sub 3])[sub 3][center dot]3TBP and the heavy lanthanides extracted as Ln(NO[sub 3])[sub 3][center dot]2TBP when TBP-modified CO[sub 2] was used as the extractant, while Ln(TTA)[sub 3][center dot] 3TBP and Ln(TTA)[sub 3][center dot]2TBP adducts were extracted when TTA was added to TBP-modified CO[sub 2]. 17 refs., 1 fig., 3 tabs.
- OSTI ID:
- 7110959
- Journal Information:
- Analytical Chemistry (Washington); (United States), Vol. 66:13; ISSN 0003-2700
- Country of Publication:
- United States
- Language:
- English
Similar Records
Features of gadolinium and ytterbium extraction by tributyl phosphate from concentrated nitric acid solutions. II. IR spectra of lanthanide extracts
Enhancement effect of tris(8-quinolinolato)cobalt(III) on the extraction of lanthanide(III) with 2-thenoyltrifluoroacetone
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
RARE EARTH COMPOUNDS
SUPERCRITICAL GAS EXTRACTION
CARBON DIOXIDE
CERIUM IONS
COMPILED DATA
DYSPROSIUM IONS
EUROPIUM IONS
GADOLINIUM IONS
IONS
LANTHANUM IONS
LIGANDS
LITHIUM NITRATES
LUTETIUM IONS
NITRIC ACID
REPROCESSING
SAMARIUM IONS
SYNERGISM
TBP
TTA
YTTERBIUM IONS
ALKALI METAL COMPOUNDS
BUTYL PHOSPHATES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHARGED PARTICLES
DATA
ESTERS
EXTRACTION
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
KETONES
LITHIUM COMPOUNDS
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORIC ACID ESTERS
SEPARATION PROCESSES
SOLVENT EXTRACTION
050800* - Nuclear Fuels- Spent Fuels Reprocessing
400105 - Separation Procedures
400702 - Radiochemistry & Nuclear Chemistry- Properties of Radioactive Materials