Temperature effect on the extraction of Np(V) by n-octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide
- Univ. of Tokyo (Japan)
The temperature effect on the solvent extraction of Np(V) by n-octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) from nitric acid solutions was studied. A slight decline of distribution ratio was observed at increasing temperature in the CMPO and CMPO-TBP systems. It was found that HNO[sub 3] is extracted by CMPO with the following extraction stoichiometry: H[sup +] + NO[sub 3][sup [minus]] + CMPO = (CMPO)[center dot]HNO[sub 3] [HNO[sub 3]] [le] 1M, 2H[sup +] + 2NO[sub 3][sup [minus]] + CMPO = (CMPO)[center dot]2HNO[sub 3] [HNO[sub 3]] [ge] 4M. Thermodynamic parameters of extraction of Np from 0.5M and 4.0M HNO[sub 3] were determined. At [le]2M HNO[sub 3], addition of TBP suppresses the distribution ratio of Np. However, at 4M HNO[sub 3], relative to the CMPO alone, a mixture of 0.2M CMPO and 1.4M TBP shows a slight increase in distribution ratio of Np. 6 refs., 6 figs., 2 tabs.
- OSTI ID:
- 6487401
- Journal Information:
- Solvent Extraction and Ion Exchange; (United States), Journal Name: Solvent Extraction and Ion Exchange; (United States) Vol. 11; ISSN 0736-6299; ISSN SEIEDB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Solvent extraction of neptunium by n-octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide from nitric acid solution containing hydrogen peroxide
Extraction of Am(III) from nitric acid by octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide-tri-n-butyl phosphate mixtures
Related Subjects
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ACTINIDE COMPOUNDS
ELECTROMAGNETIC RADIATION
EXTRACTION
GAMMA RADIATION
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IONIZING RADIATIONS
MANAGEMENT
NEPTUNIUM COMPOUNDS
NITRIC ACID
PROCESSING
RADIATIONS
RADIOACTIVE WASTE MANAGEMENT
RADIOACTIVE WASTE PROCESSING
SEPARATION PROCESSES
SOLVENT EXTRACTION
TEMPERATURE DEPENDENCE
THERMODYNAMICS
TRANSURANIUM COMPOUNDS
WASTE MANAGEMENT
WASTE PROCESSING