Obtaining Nitric Acid Solutions of Uranyl at Deficiency of NO3– Anions

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Аннотация

The dissolution of uranium oxides of various chemical compositions at different nitric acid solution concentrations and flow rates with obtaining uranyl nitrate solutions with a deficiency of NO3 – anions was studied. The dependences of the solubility of uranyl hydroxonitrates on the nitric acid deficiency relative to stoichiometry and temperature were determined. It was shown that the solubility of hydroxonitrates in these solutions is higher than the solubility of uranyl nitrates obtained with stoichiometric or excess nitric acid content. In addition, the solubility of hydroxonitrates increases with temperature. The kinetics of uranium oxide dissolution in various temperature regimes with the formation of solutions with nitric acid deficiency relative to stoichiometry were studied. The initial dissolution rate of U3O8 in uranyl nitrate solution was determined in the temperature range from 40 to 104°C.

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Авторлар туралы

V. Sofronov

Seversk Technological Institute, Branch of the National Research Nuclear University MEPhI

Хат алмасуға жауапты Автор.
Email: vlsofronov@mephi.ru
Ресей, Kommunisticheskii pr. 65, Seversk, Tomsk oblast, 636036

V. Lavrentyev

Siberian Chemical Plant

Email: vlsofronov@mephi.ru
Ресей, ul. Kurchatova 1 Seversk, Tomsk oblast, 636039

Әдебиет тізімі

  1. Лысенко Е.К., Марушкин Д.В., Миреев Т.А., Хмелевская И.В., Чумак Л.Г. Патент RU 2568729. Приоритет 15.10.2024. Опубл. 20.11.2015 // Б.И. 2015. № 32.
  2. Сиборг Г.Т., Кац Дж.Д. Химия актинидных элементов. М.: Атомиздат, 1960. С. 194–195.
  3. Виноградов А.П., Рябчиков Д.И., Сенявин М.М. Аналитическая химия урана / Под ред. А.П. Виноградова. М.: Изд-во АН СССР, 1962. С. 31–33.
  4. Вдовенко В.М. Современная радиохимия. М.: Атомиздат, 1969. С. 296.
  5. Липилина И.И. Уранил и его соединения. М.: Изд-во АН СССР, 1959. С. 53.
  6. Johannes B.W., Arend J., Marie E.H. US Patent 3838062. Priority of Jan. 15, 1971. Publ. Sept. 24, 1974.
  7. Johannes B.W., Arend J., Marie E.A. US Patent 4051060. Priority of Nov. 28, 1975. Publ. Sept. 27, 1977.
  8. Johannes B.W., Arend J., Marie E.A. US Patent 3838062. Priority of Jan. 15, 1971. Publ. Aug. 24, 1972.
  9. Винокуров С.Е., Куляко Ю.М., Маликов Д.А., Мясоедов Б.Ф., Перевалов С.А., Самсонов М.Д., Трофимов Т.И. Патент RU 2400846. Приоритет 02.07.2009. Опубл. 27.09.2010 // Б.И. 2010. № 27.
  10. ОИ 001.637-2007-2007: Методика комплексонометрического определения содержания урана в технологических растворах. Северск, срок действия продлен 26.12.2022. 15 с.
  11. ИА 70/25-6.7-2012: Потенциометрический метод измерений массовой концентрации азотной кислоты. Северск, введена 15.06.2021. 54 с.

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2. Fig. 1. Dependence of the composition of the obtained solution on the HNO3/U ratio at the dissolution of U3O8 in the solution with [HNO3] = 300 g/l.

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3. Fig. 2. Solubility isotherms of UO2(NO3) x(OH)2-x in nitric acid solutions.

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4. Fig. 3. Solubility isotherm of UO2(NO3) x(OH)2-x in nitric acid solutions and the existence region of uranyl nitrate solutions. 1-3 - numbers of solutions (see text).

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5. Fig. 4. Variation of [U] and [HNO3] during the dissolution of U3O8 in uranyl nitrate solution at different temperature.

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6. Fig. 5. Temperature dependence of the degree of dissolution of U3O8 in uranyl nitrate solution.

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7. Fig. 6. Dependence of U3O8 dissolution rate in uranyl nitrate solution on the solution temperature.

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