Formation of a third phase in the simultaneous extraction of actinide(IV) and uranyl nitrates by tributyl phosphate in dodecane
The loading of a 30 vol.% solution of tributyl phosphate in dodecane with large amounts of thorium(IV), uranium(IV) or plutonium(IV) nitrate in the presence of uranyl nitrate causes the formation of a second organic phase, which contains both the actinide(IV) and uranium(VI). The presence of uranium(VI) in the third phase is due to physical distribution of uranyl nitrate, solvated by tributyl phosphate, between the two organic phases. Equations are suggested which describe the distribution of some components between the organic phases, and the actinide(IV) to uranium(VI) ratio in the second organic phase. The maximum attainable concentration of actinides(IV) in the organic phase of a two-liquid-phase system, at which a third phase is not yet formed, was measured and described by an empirical equation as a function of the concentration of uranium(VI) in the organic phase and of ntiric acid in the aqueous phase. 4 figures, 3 tables.
- Research Organization:
- Nuclear Research Centre, Karlaruhe, Germany
- OSTI ID:
- 5597077
- Journal Information:
- Solvent Extr. Ion Exch.; (United States), Vol. 1:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
DODECANE
ABSORPTION SPECTRA
SOLVENT PROPERTIES
DTPA
CHEMICAL REACTIONS
SOLVENT EXTRACTION
NITRIC ACID
PICOLINIC ACID
PLUTONIUM
PLUTONIUM COMPLEXES
SOLVATION
PLUTONIUM NITRATES
TBP
THORIUM
THORIUM COMPLEXES
THORIUM NITRATES
URANIUM
URANIUM COMPLEXES
URANYL NITRATES
AQUEOUS SOLUTIONS
CHEMICAL REACTION YIELD
DATA ANALYSIS
EQUILIBRIUM
EXPERIMENTAL DATA
LEAST SQUARE FIT
PH VALUE
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
SODIUM HYDROXIDES
STRUCTURAL CHEMICAL ANALYSIS
TITRATION
ACTINIDE COMPLEXES
ACTINIDE COMPOUNDS
ACTINIDES
ALKALI METAL COMPOUNDS
ALKANES
AMINO ACIDS
AZINES
BUTYL PHOSPHATES
CARBOXYLIC ACIDS
CHELATING AGENTS
CHEMICAL ANALYSIS
COMPLEXES
DATA
DISPERSIONS
DRUGS
ELEMENTS
ESTERS
EXTRACTION
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
INORGANIC ACIDS
MAXIMUM-LIKELIHOOD FIT
METALS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
NUMERICAL SOLUTION
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHORIC ACID ESTERS
PICOLINES
PLUTONIUM COMPOUNDS
PYRIDINES
RADIOPROTECTIVE SUBSTANCES
SEPARATION PROCESSES
SODIUM COMPOUNDS
SOLUTIONS
SPECTRA
THORIUM COMPOUNDS
TRANSURANIUM COMPLEXES
TRANSURANIUM COMPOUNDS
TRANSURANIUM ELEMENTS
URANIUM COMPOUNDS
URANYL COMPOUNDS
YIELDS
400105* - Separation Procedures
050800 - Nuclear Fuels- Spent Fuels Reprocessing