Extraction of REE(III), U(VI), and Th(IV) from HNO3 and HClO4 solutions with (α-pyridyl)tetraphenylmethylenediphosphine N,P,P'-trioxide
- Authors: Turanov A.N.1, Kadandashev V.K.2,3, Matveeva A.G.4, Bodrin G.V.4, Matveev S.V.4
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Affiliations:
- Institute of Solid State Physics
- Institute of Microelectronics Technology and High Purity Materials
- Moscow Institute of Steel and Alloys
- Nesmeyanov Institute of Organoelement Compounds
- Issue: Vol 59, No 5 (2017)
- Pages: 490-494
- Section: Article
- URL: https://journals.rcsi.science/1066-3622/article/view/224154
- DOI: https://doi.org/10.1134/S1066362217050083
- ID: 224154
Cite item
Abstract
Extraction of microamounts of U(VI), Th(IV), and REE(III) from HNO3 and HClO4 solutions with solutions of (α-pyridyl)tetraphenylmethylenediphosphine N,P,P'-trioxide in dichloroethane was studied. The stoichiometry of the extractable complexes was determined, and the influence of the extraction structure and aqueous phase composition on the efficiency and selectivity of the extraction of U(VI), Th(IV), and REE(III) into the organic phase was studied. Introduction of the pyridine N-oxide fragment into the methylene bridge of the tetraphenylmethylenediphosphine dioxide molecule to obtain (α-pyridyl)tetraphenylmethylenediphosphine N,P,P'-trioxide leads to a decrease in its ability to extract U(VI), Th(IV), and REE(III) from nitric acid solutions, whereas the U/REE separation factors increase. The REE(III) extraction efficiency considerably increases in going from nitric acid to perchloric acid solutions.
About the authors
A. N. Turanov
Institute of Solid State Physics
Author for correspondence.
Email: turanov@issp.ac.ru
Russian Federation, ul. Akad. Osip’yana 2, Chernogolovka, Moscow oblast, 142432
V. K. Kadandashev
Institute of Microelectronics Technology and High Purity Materials; Moscow Institute of Steel and Alloys
Email: turanov@issp.ac.ru
Russian Federation, ul. Akad. Osip’yana 6, Chernogolovka, Moscow oblast, 142432; Leninskii pr. 4, Moscow, 119991
A. G. Matveeva
Nesmeyanov Institute of Organoelement Compounds
Email: turanov@issp.ac.ru
Russian Federation, ul. Vavilova 28, Moscow, 119991
G. V. Bodrin
Nesmeyanov Institute of Organoelement Compounds
Email: turanov@issp.ac.ru
Russian Federation, ul. Vavilova 28, Moscow, 119991
S. V. Matveev
Nesmeyanov Institute of Organoelement Compounds
Email: turanov@issp.ac.ru
Russian Federation, ul. Vavilova 28, Moscow, 119991