Exothermic processes in mixtures of TBP with nitric acid

被引：9
|
作者：
Nazin E.R. [1 ]
Zachinyaev G.M. [1 ]
Belova E.V. [2 ]
Tkhorzhnitskii G.P. [2 ]
Myasoedov B.F. [2 ]
机构：
[1] Scientific and Technical Center for Nuclear and Radiation Safety, ul. Malaya Krasnosel’skaya 2/8, korp. 5, Moscow
[2] Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, korp. 4, Moscow
来源：
Radiochemistry | 2017年 / 59卷 / 5期
基金：
俄罗斯科学基金会;
关键词：
exothermic reactions; nitric acid; radiolysis; self-accelerating processes; tributyl phosphate;
D O I：
10.1134/S1066362217050125
中图分类号：
学科分类号：
摘要：
Causes of initiation of exothermic self-accelerating oxidation processes in mixtures of TBP with HNO3 are analyzed. The main condition is heating of the mixtures to temperatures (Тst) above which the heat release in the chemical reaction starts to exceed the heat removal from the system. After the initiation of selfaccelerating exothermic reactions, their development and intensity depend on whether the vessels are sealed, on the HNO3 concentration, and on the heating time. Heat treatment and radiolysis of the extractant slightly decrease Тst of its mixtures with HNO3 compared to the values for the “fresh” extractant. © 2017, Pleiades Publishing, Inc.
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页码：512 / 519
页数：7
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