Phosphate and Phosphate Analogue Complexes of Uranyl Nitrate

Autor:	Iain May, Leigh R. Martin, Jeremy J. Hastings, Madeleine Helliwell, I. S. Denniss, David Collison
Rok vydání:	2002
Předmět:	Nuclear and High Energy Physics Chemistry Extraction (chemistry) Inorganic chemistry chemistry.chemical_element Actinide PUREX Uranium Phosphate chemistry.chemical_compound Nuclear Energy and Engineering Uranyl nitrate Nitric acid Tributyl phosphate Nuclear chemistry
Zdroj:	Journal of Nuclear Science and Technology. 39:453-456
ISSN:	1881-1248 0022-3131
DOI:	10.1080/00223131.2002.10875505
Popis:	In the Purex process the selective uranium and plutonium extraction (and back extraction) from nitric acid into 30% tri butyl phosphate/ odourless kerosene is used to separate uranium and plutonium from each other and fission products in spent nuclear fuel recycle process. The presence of dibutyl phosphate (a tributyl phosphate degradation product) can inhibit the uranium (and plutonium) back extraction process by forming very stable solvent phase complexes with these actinides. However, the types of complexes that exist and prevent back extraction have not been fully characterised. A model compound approach has been adopted in which the co-ordination chemistry of UO22+ with a range of P=0 and P(0)OH ligands have been studied. These complexes have been characterised using spectroscopic techniques including IR, Raman, UV7 vis, 31NMR NMR, and by single crystal X-ray diffraction to assess their utility in identifying molecular species under extraction conditions. We report full structural characterisation of...
Databáze:	OpenAIRE
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