Abstract
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 1H-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.
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Funding
This work was performed within the framework of the state order of to the Institute of Chemistry and Chemical Technologies, Siberian Branch, Russian Academy of Sciences (project no. АААА-А17-117021310220-0) using the equipment of the Krasnoyarsk Regional Center for Collective Use, Federal Research Center, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences.
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Kuzmin, V.I., Leskiv, M.N., Peterson, I.V. et al. Interfacial Separation of Organic Phase Components in Systems Containing Aqueous Colloidal Solutions of Sodium Di-(2-Ethylhexyl)Phosphate. Colloid J 83, 88–96 (2021). https://doi.org/10.1134/S1061933X21010075
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DOI: https://doi.org/10.1134/S1061933X21010075