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Extraction of Lanthanide(III) and Uranyl(VI) from Nitric Acid Solution by Malonamides

Published online by Cambridge University Press:  15 February 2011

Takashi Nakamura ,
Yuki Matsuda  and
Chie Miyake
Takashi Nakamura
Affiliation:
Department of Nuclear Engineering, Faculty of Engineering, Osaka university, Yamadaoka, Suita-shi, Osaka 565, Japan
Yuki Matsuda
Affiliation:
Department of Nuclear Engineering, Faculty of Engineering, Osaka university, Yamadaoka, Suita-shi, Osaka 565, Japan
Chie Miyake
Affiliation:
Department of Nuclear Engineering, Faculty of Engineering, Osaka university, Yamadaoka, Suita-shi, Osaka 565, Japan
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Abstract

The extractive properties of two malonamide extractants, DMDBO3NPDA and DMDBMA were investigated for the extraction of lanthanide(III) and uranyl(VI) ions in benzene-nitric acid systems. It was found that DMDBO3NPDA 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 DMDBO3NPDA 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.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 353: Symposium – Scientific Basis for Nuclear Waste Management XVIII , 1994 , 1293
Copyright
Copyright © Materials Research Society 1995

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References

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