Published December 1987
| Version v1
Journal article
Solvent extraction of thorium from mixed organic-aqueous nitric acid media by tri-n-octylphosphine oxide
- 1. University of Garyounis, Benghazi (Libya). Dept. of Chemistry and Physics
Description
The extraction equilibria of Th in tri-n-octylphosphine oxide (TOPO)-HNO3-H2O systems were investigated in the absence and presence of water-miscible alcohols and acetone. The influence of TOPO concentration in an inert diluent (toluene) and the concentration of nitric acid and the water-miscible additives were systematically examined. The slopes of the log-log plots of DTh vs. the TOPO concentration (up to 0.02M) are found to be close to 3 over a wide range of polar phase compositions leading to a coordination number of 11 for Th. The results show that at TOPO concentrations above about 2.5x10-3M (about 1 %) in toluene, polymerization of the solvent occurs. (author) 23 refs
Additional details
Publishing Information
- Journal Title
- J. Radioanal. Nucl. Chem.
- Journal Volume
- 116
- Journal Issue
- 2
- Series
- J. Radioanal. Nucl. Chem. ;Articles.
- Journal Page Range
- 271-284
- ISSN
- 0236-5731
- CODEN
- JRNCD
INIS
- Country of Publication
- Hungary
- Country of Input or Organization
- Hungary
- INIS RN
- 19065890
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ACETONE; ALCOHOLS; AQUEOUS SOLUTIONS; MIXED SOLVENTS; NITRIC ACID; NUMERICAL DATA; SOLVENT EXTRACTION; THORIUM COMPLEXES; THORIUM 234; TIME DEPENDENCE; TOPO; TRACER TECHNIQUES; URANYL NITRATES
- Descriptors DEC
- ACTINIDE COMPLEXES; ACTINIDE COMPOUNDS; ACTINIDE NUCLEI; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; COMPLEXES; DATA; DAYS LIVING RADIOISOTOPES; DISPERSIONS; EVEN-EVEN NUCLEI; HEAVY NUCLEI; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; HYDROXY COMPOUNDS; INFORMATION; INORGANIC ACIDS; INORGANIC COMPOUNDS; INTERNAL CONVERSION RADIOISOTO; ISOTOPE APPLICATIONS; ISOTOPES; KETONES; MIXTURES; NITRATES; NITROGEN COMPOUNDS; NUCLEI; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXYGEN COMPOUNDS; RADIOISOTOPES; SEPARATION PROCESSES; SOLUTIONS; SOLVENTS; THORIUM ISOTOPES; URANIUM COMPOUNDS; URANYL COMPOUNDS