Solubility and Extraction of Metal Ions in Inorganic Acid–Potassium Bis(alkylpolyoxyethylene)phosphate–Water Systems

S. A. Denisova; Денисова С. А.; D. A. Svezhov; Свежов Д. А.; A. M. Elokhov; Елохов А. М.

doi:10.31857/S0044453723020048

Solubility and Extraction of Metal Ions in Inorganic Acid–Potassium Bis(alkylpolyoxyethylene)phosphate–Water Systems

Authors: Denisova S.A.¹, Svezhov D.A.¹, Elokhov A.M.¹
Affiliations:
1. Perm National Research University
Issue: Vol 97, No 2 (2023)
Pages: 241-246
Section: ФИЗИЧЕСКАЯ ХИМИЯ РАСТВОРОВ
Submitted: 27.02.2025
Published: 01.02.2023
URL: https://permmedjournal.ru/0044-4537/article/view/668836
DOI: https://doi.org/10.31857/S0044453723020048
EDN: https://elibrary.ru/DRHPBV
ID: 668836

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Abstract
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Abstract

The boundaries of the segregation region in sulfuric (nitric, chloric, hydrochloric) acid–potassium bis(alkylpolyoxyethylene) phosphate–water systems at 25°С have been determined by isothermal titration. The salting-out ability of the inorganic acid was found to increase with a decrease in the absolute value of the Gibbs energy of anion hydration. Based on the obtained diagrams, the optimum parameters of extraction were determined, and tendencies in the distribution of some metal ions in the sulfuric acid–potassium bis(alkylpolyoxyethylene) phosphate–water system were studied. Conditions for quantitative extraction of thallium(III) in the presence of alkali metal halides were found.

Keywords

anionic surfactants, liquid extraction, halide acid complexes, salting-out

References

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