The isolation of lutetium from gadolinium contained in Purex process solutions
A chemical separation procedure has been devised to isolate Lu from Purex dissolver solutions containing the neutron poison, Gd. The isolation procedure involves the removal of U and >Pu from a dissolver solution using tributylphosphate solvent extraction. If required, solvent extraction using di-(2-ethylhexyl) phosphoric acid can be employed to further purify the sample be removing alkali and alkali earth elements. Finally, Lu is chromatographically separated from Gd and rare earth fission products on a Dowex 50W-X8 resin column using an alpha-hydroxyisobutyrate eluant. The success of the chemical separation procedure has been demonstrated in the quantitative recovery of as little as 1.4 ng Lu from solutions containing a 5000-fold excess of Gd. Additionally, Lu has been isolated from synthetic dissolver samples containing U, Ba, Cs, and Gd. Thermal emission MS data indicated that the Lu fraction of the synthetic sample was free of Gd interference.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 7103366
- Report Number(s):
- ORNL/TM-12000; ON: DE92040946
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
050800* -- Nuclear Fuels-- Spent Fuels Reprocessing
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
ACTINIDES
ALKALINE EARTH METALS
BARIUM
BUTYL PHOSPHATES
CHROMATOGRAPHY
DISPERSIONS
DISSOLVERS
ELEMENTS
ESTERS
EXTRACTION
FISSION PRODUCTS
GADOLINIUM
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ISOTOPES
LUTETIUM
MATERIALS
METALS
MIXTURES
NITRIC ACID
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
PROCESS SOLUTIONS
PUREX PROCESS
RADIOACTIVE MATERIALS
RARE EARTHS
REPROCESSING
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
TBP
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11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
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ACTINIDES
ALKALINE EARTH METALS
BARIUM
BUTYL PHOSPHATES
CHROMATOGRAPHY
DISPERSIONS
DISSOLVERS
ELEMENTS
ESTERS
EXTRACTION
FISSION PRODUCTS
GADOLINIUM
HYDROGEN COMPOUNDS
INORGANIC ACIDS
ISOTOPES
LUTETIUM
MATERIALS
METALS
MIXTURES
NITRIC ACID
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
PHOSPHORIC ACID ESTERS
PROCESS SOLUTIONS
PUREX PROCESS
RADIOACTIVE MATERIALS
RARE EARTHS
REPROCESSING
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
TBP
URANIUM