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Solubility of tributyl phosphate and its degradation products in concentrated uranyl nitrate solutions and of uranyl nitrate in tributyl phosphate at elevated temperatures

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Abstract

Solubility of UO2(NO3)2, TBP, and its degradation products in the organic and aqueous phases of the system TPB-H2O-HNO3-UO2(NO3)2 at 25–128°C over the uranyl nitrate concentration range 200–1200 g 1−1 is studied. The solubility of TBP and its degradation products in uranyl nitrate hexahydrate melt decreases in the order H2MBP > HDBP > TBP > H3PO4. At the boiling point of the melt, their solubility ranges from 100 to 0.5 g l−1. The solubility of uranyl nitrate in the TBP phase under the same conditions is caused by formation of complexes with a composition close to that of the monosolvate UO2(NO3) 2⋅ TBP.

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Authors and Affiliations

  1. Khlopin Radium Institute, Research and Production Association, St. Petersburg, Russia

    V. N. Usachev & G. S. Markov

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  1. V. N. Usachev
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  2. G. S. Markov
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Translated from Radiokhimiya, Vol. 46, No. 5, 2004, pp. 436–439.

Original Russian Text Copyright © 2004 by Usachev, Markov.

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Usachev, V.N., Markov, G.S. Solubility of tributyl phosphate and its degradation products in concentrated uranyl nitrate solutions and of uranyl nitrate in tributyl phosphate at elevated temperatures. Radiochemistry 46, 471–474 (2004). https://doi.org/10.1007/s11137-005-0012-y

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  • DOI: https://doi.org/10.1007/s11137-005-0012-y

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