Extraction of lanthanide(III) and uranyl(VI) from nitric acid solution by malonamides
Book
·
OSTI ID:382912
- Osaka Univ., Suita, Osaka (Japan). Dept. of Nuclear Engineering
The extractive properties of two malonamide extractants, DMDBO{sub 3}NPDA and DMDBMA were investigated for the extraction of lanthanide(III) and uranyl(VI) ions in benzene-nitric acid systems. It was found that DMDBO{sub 3}NPDA has a higher extractive capacity than DMDBMA. The difference in their extracting capacities is discussed, based on the enthalpy changes for the extraction reactions and IR data for complexes of metal nitrates with malonamides. In addition, the applicability of a mixed solvent of n-dodecane and some aliphatic alcohols as a diluent for DMDBO{sub 3}NPDA was examined. the longer the carbon chain and the higher the concentration of the aliphatic alcohol, the more the phase compatibility improves. The distribution ratios of neodymium(III) ion increase with an increase in the carbon chain length of linear aliphatic alcohol and with a decrease in its concentration.
- OSTI ID:
- 382912
- Report Number(s):
- CONF-941075--; ISBN 1-55899-253-7
- Country of Publication:
- United States
- Language:
- English
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