THE EXTRACTION OF NITRATES BY PHOSPHORYLATED REAGENTS. I. THE RELATIVE EXTRACTION RATES AND SOLVATING MECHANISMS FOR URANYL NITRATE

Journal Article · Wed Apr 01 04:00:00 EST 1959 · J. Inorg. & Nuclear Chem.

DOI:https://doi.org/10.1016/0022-1902(59)80195-0· OSTI ID:4253163

Healy, T V; Kennedy, J

The partitioning of uranyl nitrate between a number of non-ionic phosphorylated reagents and dilute nitric acid was measured. Experiments at varying concentrations of the extractants (S) in an inert diluent such as benzene indicate that in most cases the disolvates aining the diphosphoryl group =P(O) -Y- (0)P=,(where Y is oxygen, methylene, or ethylene) also give disolvates when the latter are in large excess of the uranium, but when saturated with uranyl nitrate the solvates STAUO/sub 2/ The implications of these results are discussed. Electronegative or base weakening substituents on the phosphoryl group decrease the partition coefficient, and that obtained with triphenyl phosphate is almost six orders of magnitude lower than the partition obtained with tributyl phosphine oxide. Preliminary experiments with di-n-butyl phosphoric acids indicate that this reagent extracts uranium by a chelating mechanism accompanied by hydrogen ion liberation from solutions low in nitric acid (<3.0 M), and by a solvating mechanism similar to that with non-ionic reagents at higher aqueous acid concentrations. The structure of the uranyl dibutyl phosphate complex is discussed. (auth)

• Research Organization: Atomic Energy Research Establishment, Harwell, Berks, Eng.
• NSA Number: NSA-13-015105
• OSTI ID: 4253163
• Journal Information: J. Inorg. & Nuclear Chem., Journal Name: J. Inorg. & Nuclear Chem. Vol. Vol: 10
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ACIDITY
ATOMIC MODELS
BENZENE
BUTYL RADICALS
CHELATES
CHEMICAL REACTIONS
CHEMICALS
CHEMISTRY
COMPLEXES
CONFIGURATION
DECONTAMINATION
DISTRIBUTION
EFFICIENCY
ETHYL RADICALS
ETHYLENE
HYDROGEN
IONS
MEASURED VALUES
METHYL RADICALS
NITRIC ACID
OXYGEN
PERFORMANCE
PHASE DIAGRAMS
PHENYL RADICALS
PHOSPHATES
PHOSPHORIC ACID
PHOSPHORUS COMPOUNDS
QUANTITY RATIO
SOLUTIONS
SOLVENT EXTRACTION
SOLVENTS
TABLES
TBPO
URANYL COMPOUNDS
URANYL NITRATES
USES
WATER