The influence of uranyl nitrate on exothermic processes in nitric acid solutions of reducing agents

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Abstract

The thermal stability of nitric acid solutions of acetohydroxamic acid, carbohydrazide, hydrazine nitrate, and their mixtures was studied. The onset temperature of the exothermic reaction was determined, and the thermal effects of the reactions were calculated. The influence of uranyl nitrate on the thermal stability of reducing agents and their mixtures was studied. Comparison of the characteristics of exothermic processes in solutions with and without uranyl nitrate showed that the introduction of uranyl nitrate reduced the intensity of exothermic processes in all the nitric acid solutions studied.

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About the authors

A. S. Ob”edkov

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences

Email: bl174@bk.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071

A. N. Grishaev

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences

Email: bl174@bk.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071

E. V. Belova

Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences

Author for correspondence.
Email: bl174@bk.ru
Russian Federation, Leninskii pr. 31, korp. 4, Moscow, 119071

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Supplementary files

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3. Fig. 1. Change in heat flow during heating of solutions in 3.2 mol/l HNO3: 1 – GN, 2 – GN with UN

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4. Fig. 2. Change in heat flow during heating of solutions in 3.2 mol/l HNO3: 1 – AGC, 2 – AGC with UN

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5. Fig. 3. Change in heat flow during heating of solutions in 3.2 mol/l HNO3: 1 – AGC with GN, 2 – AGC with GN and UN

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6. Fig. 4. Change in heat flow during heating of solutions in 3.2 mol/l HNO3: 1 – KG, 2 – KG with UN

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7. Fig. 5. Change in heat flow during heating of solutions in 3.2 mol/l HNO3: 1 – KG with GN, 2 – KG with GN and UN

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