The Reduction of Np(VI) by Acetohydroxamic Acid in Nitric Acid Solution
Creators
- 1. Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)
Description
Spent nuclear fuel is reprocessed commercially by the chemical process to recover U and Pu. Recently, new salt-free reagents to separate plutonium and neptunium from uranium suitable for use in a single cycle flowsheet have been developed. Acetohydroxamic acid (CH3CONHOH) has been taken much interest in as a complexing agent capable of selective stripping of tetravalent actinides from U(VI) when actinides are present in the solvent stream of the advanced PUREX process. Additionally acetohydroxamic acid will rapidly reduce Np(VI) to inextractable Np(V) thus allowing the separation of Np from U. In this study, the rate equation for the reduction of Np(VI) to Np(V) in nitric acid aqueous solution has been determined as:-[NpO22+]/dt = K[NpO22+][AHA] with k = 191.2 ± 11.2 M-1s-1 at 25 ± 0.5 .deg. C and [HNO3] = 1.0 M. Comparison with other reductants available in the literature, acetohydroxamic acid is a strong one for NpO22+
Additional details
Publishing Information
- Journal Title
- Bulletin of the Korean Chemical Society
- Journal Volume
- 26
- Journal Issue
- 11
- Series
- 15 refs, 2 figs, 1 tab
- Journal Page Range
- p. 1692-1694
- ISSN
- 0253-2964
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 48101894
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- AQUEOUS SOLUTIONS; NEPTUNIUM; NITRIC ACID; REDUCTION; SOLVENTS; SPENT FUELS
- Descriptors DEC
- ACTINIDES; CHEMICAL REACTIONS; DISPERSIONS; ELEMENTS; ENERGY SOURCES; FUELS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; INORGANIC ACIDS; INORGANIC COMPOUNDS; MATERIALS; METALS; MIXTURES; NITROGEN COMPOUNDS; NUCLEAR FUELS; OXYGEN COMPOUNDS; REACTOR MATERIALS; SOLUTIONS; TRANSURANIUM ELEMENTS