Extraction of Am(III) and Fe(III) by selected dihexyl N,N-dialkylcarbamoylmethyl-phosphonates, -phosphinates and -phospine oxides from nitrate media
A series of neutral bifunctional extractants related to dihexyl N,N,-diethylcarbamoylmethylphosphonate (DHDECMP) have been prepared and studied for the liquid-liquid extraction of Am(III) and Fe(III) from nitrate solutions. Changes in the steric bulk of the substitutent alkyl chains and in the electronegativity of the groups attached to the phosphoryl center in these compounds have brought about large changes in distribution ratios and selectivities for the extraction of these metals. Comparisons of these extractants to related monofunctional phosphorus-based compounds have revealed that these bifunctional species behave as monodentate, rather than chelating, extractants. The presence of the carbamoyl portion of the extractant molecules is important not for coordination to the metal, but for the ability to buffer the extractant against the effects of HNO/sub 3/. 9 figures, 2 tables.
- Research Organization:
- Argonne National Lab., IL
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 5619865
- Report Number(s):
- CONF-810520-; TRN: 82-006664
- Journal Information:
- Sep. Sci. Technol.; (United States), Vol. 16:9; Conference: Symposium on separation science and technology for energy applications, Gatlinburg, TN, USA, 5 May 1981
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMERICIUM
SOLVENT EXTRACTION
IRON
ADDUCTS
ALKANES
AMERICIUM COMPLEXES
AQUEOUS SOLUTIONS
COMPARATIVE EVALUATIONS
DHDECMP
EFFICIENCY
ELECTRONEGATIVITY
EXPERIMENTAL DATA
IRON COMPLEXES
LITHIUM NITRATES
NITRIC ACID
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SOLVENTS
OXIDES
PHOSPHINIC ACID ESTERS
SPECIFICITY
ACTINIDE COMPLEXES
ACTINIDES
ALKALI METAL COMPOUNDS
CHALCOGENIDES
COMPLEXES
DATA
DISPERSIONS
ELEMENTS
ESTERS
EXTRACTION
HYDROCARBONS
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
LITHIUM COMPOUNDS
METALS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHOSPHONIC ACID ESTERS
SEPARATION PROCESSES
SOLUTIONS
SOLVENTS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM COMPLEXES
TRANSURANIUM ELEMENTS
400105* - Separation Procedures