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Extraction of TcO/sub 4//sup -/ and Pd(II) by dihexyl-N,N-diethylcarbamoylmethylphosphonate from nitric acid

Journal Article · · Sep. Sci. Technol.; (United States)
The extraction behavior of TcO/sub 4//sup -/ and Pd(II) from aqueous HNO/sub 3/ was studied using dihexyl-N,N-diethylcarbamoylmethylphosphonate. Distribution ratios were studied as a function of contact time; concentration of solute, acid, and extractant; and extraction temperature. Extraction measurements of TcO/sub 4//sup -/ were also made using H/sub 2/SO/sub 4/ in the aqueous phase. It was found that the extractant dependency for TcO/sub 4//sup -/ is third power. Distribution measurements for TcO/sub 4//sup -/ as a function of temperature in the range of 0 to 50/sup 0/C led to a calculation of the thermodynamic quantity ..delta.. H. A third power extractant dependency for Pd(II) is suggested but is not strongly corroborated. Interpretation of Pd(II) data was hindered by slow kinetics (approximately 1 h to reach equilibrium and variations in distribution ratios with aqueous Pd(II) concentration. 11 figures, 3 tables.
Research Organization:
EG and G Idaho, Inc., Idaho Falls
OSTI ID:
5257873
Journal Information:
Sep. Sci. Technol.; (United States), Journal Name: Sep. Sci. Technol.; (United States) Vol. 17:2; ISSN SSTED
Country of Publication:
United States
Language:
English

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ANIONS
AROMATICS
CHARGED PARTICLES
CHROMIUM COMPLEXES
COMPLEXES
DATA
DHDECMP
DISSOLUTION
ELEMENTS
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EXPERIMENTAL DATA
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INORGANIC ACIDS
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NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC PHOSPHORUS COMPOUNDS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PALLADIUM
PALLADIUM COMPLEXES
PERTECHNETATES
PHOSPHONIC ACID ESTERS
PLATINUM METALS
QUANTITY RATIO
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
SPECTRA
SULFURIC ACID
TECHNETIUM
TECHNETIUM COMPLEXES
TECHNETIUM COMPOUNDS
TEMPERATURE DEPENDENCE
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TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS