Uranium stripping from tri-n-butyl phosphate by hydrofluoric acid solutions with hydrazine addition / Skripchenko S. Yu.,Smirnov A. L.,Pastukhov A. M.,Chernyshov M. V. // HYDROMETALLURGY. - 2015. - V. 157, l. . - P. 179-183.

ISSN/EISSN:
0304-386X / 1879-1158
Type:
Article
Abstract:
The process of uranium stripping from tri-n-butyl phosphate by hydrofluoric acid solutions with the addition of hydrazine was investigated in the temperature range of 20 to 60 degrees C. Uranium was selectively precipitated in the form of a hydrazine uranyl fluoride complex when stripped from TBP by HF solutions with the addition of hydrazine. The uranium precipitation increased with increasing N2H4/U molar ratio in the range of 1 to 3 and with increasing holding time. Uranium tetrafluoride was obtained by the thermal decomposition of the hydrazine uranyl fluoride complex in a hydrogen stream. The uranium content in UF4 is 76\%. The obtained uranium tetrafluoride is a high-purity product and meets all requirements imposed on UF4 at conversion plants. Thus, the stripping method provides a reduction of uranium processing operations to uranium tetrafluoride. (C) 2015 Elsevier B.V. All rights reserved.
Author keywords:
Solvent extraction; Uranium stripping; Tri-n-butyl phosphate; Hydrazine hydrate; Uranium tetrafluoride; Hydrofluoric acid URANYL FLUORIDE COMPLEXES; SPECTRA
DOI:
10.1016/j.hydromet.2015.08.015
Web of Science ID:
ISI:000364252700024
Соавторы в МНС:
Другие поля
Поле Значение
Month OCT
Publisher ELSEVIER SCIENCE BV
Address PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Language English
EISSN 1879-1158
Keywords-Plus URANYL FLUORIDE COMPLEXES; SPECTRA
Research-Areas Metallurgy \& Metallurgical Engineering
Web-of-Science-Categories Metallurgy \& Metallurgical Engineering
Author-Email uran233@mail.ru
ResearcherID-Numbers Skripchenko, Sergey/B-3615-2016 Chernyshov, Mikhail/J-9951-2012
ORCID-Numbers Skripchenko, Sergey/0000-0002-7564-886X Chernyshov, Mikhail/0000-0002-6982-0600
Funding-Acknowledgement UrFU
Funding-Text This research project has been supported by UrFU under the Framework Programme of the development of UrFU through the ``Young Scientists UrFU{''} competition.
Number-of-Cited-References 23
Usage-Count-Last-180-days 3
Usage-Count-Since-2013 20
Journal-ISO Hydrometallurgy
Doc-Delivery-Number CV4QX