Interfacial Separation of Organic Phase Components in Systems Containing Aqueous Colloidal Solutions of Sodium Di-(2-Ethylhexyl)Phosphate

Interfacial separation of components of extractants based on di-(2-ethylhexyl)phosphoric acid (di-2EHPA) in toluene and a mixture of di-2EHPA with trioctylamine in toluene has been studied in the course of treatment with aqueous sodium hydroxide solutions yielding an organic phase and an aqueous col...

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Bibliographic Details
Published in:Colloid journal of the Russian Academy of Sciences 2021, Vol.83 (1), p.88-96
Main Authors: Kuzmin, V. I., Leskiv, M. N., Peterson, I. V., Kuzmin, D. V., Gudkova, N. V., Bulavchenko, A. I.
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Colloids
Diethylhexylphosphoric acid
Hydrometallurgy
NMR spectroscopy
Photon correlation spectroscopy
Polymer Sciences
Separation
Sodium hydroxide
Sodium salts
Surfaces and Interfaces
Thin Films
Toluene
Trioctylamine
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Summary:Interfacial separation of components of extractants based on di-(2-ethylhexyl)phosphoric acid (di-2EHPA) in toluene and a mixture of di-2EHPA with trioctylamine in toluene has been studied in the course of treatment with aqueous sodium hydroxide solutions yielding an organic phase and an aqueous colloidal solution of di-2EHPA sodium salt. Conditions have been found for the isolation of almost pure di-2EHPA and toluene, as well as di-2EHPA and a trioctylamine solution in toluene. The aqueous colloidal solutions have been studied by conductometry, dynamic light scattering, and 1 H-NMR spectroscopy. The considered systems are promising to be used in hydrometallurgy for improving parameters of extraction of metals and their concentrating in re-extracts.
ISSN:1061-933X
1608-3067
DOI:10.1134/S1061933X21010075