Thermolysis of Urea Complexes of Uranyl Nitrate |
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| Authors: | N N Kostyuk |
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| Affiliation: | (1) Sevchenko Institute of Applied Physical Problems, Belarussian State University, Minsk, Belarus |
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| Abstract: | Quantitative parameters of thermolysis of uranyl nitrate urea complexes, UO2(NO3)2{(NH2)2·CO}2], UO2(H2O){(NH2)2CO}4](NO3)2, and UO2(H2O){(NH2)2CO}5](NO3)2 at 175, 200, and 225°C were measured. Thermolysis of UO2(NO3)2{(NH2)2CO}2] at 200°C affords the biuret complex of uranyl nitrate in a 90% yield. The urea ligands in the hydrated complexes completely transform into biuret at 175°C. Thermolysis of UO2(H2O){(NH2)2CO}5](NO3)2 yields the biuret-cyanurate complexes of uranyl nitrate. The features of thermolysis of the uranyl nitrate complexes originate from the chemical transformations of urea at elevated temperatures. |
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