Extraction of Am(III) from nitric acid by octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide-tri-n-butyl phosphate mixtures
The extraction behavior of Am(III) from nitric acid by octyl(phenyl)-N,N-diisobutylcarbamoylmethyphosphine oxides, O0D(IB)CMPO, in the presence of tributylphosphate, TBP, has been studied using diethylbenzene, decalin, and normal aliphatic hydrocarbon diluents. Relative to O0D(IB)CMPO alone, mixtures of TBP and O0D(IB)CMPO show a slight enhancement in the extraction of Am(III) from nitric acid solution above 2 M and a moderate decrease in extraction for lower acid concentrations. The net effect of TBP addition to O0D(IB)CMPO (as well as other selected carbamoylmethylphosphoryl extractants) is a relative insensitivity of the distribution ratio of Am(III) to HNO/sub 3/ concentration in the range of 0.5 M to 6 M and facilitated stripping of Am(III) with dilute acid. Since a continuous variation study of Am(III) extraction using mixtures of O0D(IB)CMPO and TBP at a fixed total concentration revealed no evidence of a mixed complex, the TBP appears to be behaving primarily as a phase modifier. The most significant benefit gained from addition of TBP to O0D(IB)CMPO is the increased metal ion loading capacity and extractant compatibility with alicyclic and aliphatic diluents. The use of TBP to overcome phase compatibility with other bifunctional extractants of the carbamoylmethylphosphoryl type and the use of other phase modifiers with O0D(IB)CMPO have also been investigated. 15 references, 7 figures, 2 tables.
- Research Organization:
- Argonne National Lab., IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 6877246
- Journal Information:
- Solvent Extr. Ion Exch.; (United States), Journal Name: Solvent Extr. Ion Exch.; (United States) Vol. 2:2; ISSN SEIED
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400105* -- Separation Procedures
ACTINIDES
ALKANES
AMERICIUM
AROMATICS
BUTYL PHOSPHATES
CARBONIC ACID DERIVATIVES
CYCLOALKANES
DATA
DECALIN
ELEMENTS
ESTERS
EXPERIMENTAL DATA
EXTRACTION
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
METALS
NITRIC ACID
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SOLVENTS
PHOSPHORIC ACID ESTERS
QUANTITY RATIO
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
TBP
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS