Published July 1992 | Version v1
Journal article Metadata-only

Oxidation of pentavalent neptunium by nitrous acid in TAU OCTYL(PHENYL)-N,N-DIISOBUTYLCARBAMOYLMETHYLPHOSPHINE OXI-TBP-n-dodecane organic solution

Creators

  • 1. Tokyo Univ. (Japan). Faculty of Engineering

Description

The oxidation of Np(V) by nitrous acid was investigated spectroscopically in 0.2 M CMPO-1.4 M TBP-n-dodecane and the oxidation rate constant of Np(V) was estimated assuming the first-order reaction. By using the obtained oxidation rate constant as well as taking account of the Np(V) oxidation in aqueous phase and the distribution ratios of Np(V) and Np(VI) cited from literature, extraction kinetics of Np from 4 M nitric acid solution was calculated, and was compared with the extraction kinetics measured experimentally. (author)

Additional details

Publishing Information

Journal Title
Journal of Nuclear Science and Technology (Tokyo)
Journal Volume
29
Journal Issue
7
Journal Page Range
p. 671-676.
ISSN
0022-3131
CODEN
JNSTAX

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
24035240
Subject category
S11: NUCLEAR FUEL CYCLE AND FUEL MATERIALS;
Descriptors DEI
ABSORPTION SPECTROSCOPY; AQUEOUS SOLUTIONS; CHEMICAL REACTION KINETICS; DISTRIBUTION FUNCTIONS; DODECANE; NEPTUNIUM COMPOUNDS; NITROUS ACID; ORGANIC SOLVENTS; OXIDATION; SOLVENT EXTRACTION; TBP
Descriptors DEC
ACTINIDE COMPOUNDS; ALKANES; BUTYL PHOSPHATES; CHEMICAL REACTIONS; DISPERSIONS; ESTERS; HOMOGENEOUS MIXTURES; HYDROCARBONS; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; KINETICS; MIXTURES; NITROGEN COMPOUNDS; NONAQUEOUS SOLVENTS; ORGANIC COMPOUNDS; ORGANIC PHOSPHORUS COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHORIC ACID ESTERS; REACTION KINETICS; SEPARATION PROCESSES; SOLUTIONS; SOLVENTS; SPECTROSCOPY; TRANSURANIUM COMPOUNDS