Investigation of Di-(2-Ethylhexyl)phosphoric Acid in Extraction System Used in Centrifugal Semicounterflow Extractors of Therapeutic Yttrium-90

— The method of distribution of di-(2-ethylhexyl)phosphoric acid between dodecane, isooctane, hexane, and five-molar hydrochloric acid is studied to remove the acid from the yttrium-90 back-extract to the fullest extent possible. The additional washing of the back-extract with these solvents was sug...

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Bibliographic Details
Published in:Theoretical foundations of chemical engineering 2019, Vol.53 (1), p.13-20
Main Authors: Tsivadze, A. Yu, Filyanin, A. T., Filyanin, O. A., Danilov, N. A.
Format: Article
Language:English
Subjects:
Chemical industry
Chemistry
Chemistry and Materials Science
Diethylhexylphosphoric acid
Dodecane
Extractors
Hydrochloric acid
Industrial Chemistry/Chemical Engineering
Isooctane
Low concentrations
Spectrophotometry
Yttrium
Yttrium isotopes
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Summary:— The method of distribution of di-(2-ethylhexyl)phosphoric acid between dodecane, isooctane, hexane, and five-molar hydrochloric acid is studied to remove the acid from the yttrium-90 back-extract to the fullest extent possible. The additional washing of the back-extract with these solvents was suggested, and, for this purpose, a special single-stage centrifugal extractor with a mobil light phase was developed. The amount of yttrium-90 in the final product was determined by the electrolytic method. The extraction-spectrophotometric method was used to evaluate low concentrations of di-(2-ethylhexyl)phosphoric acid in an aqueous phase.
ISSN:0040-5795
1608-3431
DOI:10.1134/S0040579519010160