Тип публикации: статья из журнала
Год издания: 2023
Идентификатор DOI: 10.1080/01496395.2023.2189053
Ключевые слова: Aliquat 336, extraction, hydration, NMR 1H study of amine salts, salts of quaternary ammonium bases, separation of halide ions, solvation
Аннотация: The analysis of the influence of dehydration and solvation (by proton-donor reagents) of halide anions in the organic phase on the processes of their solvent extraction separation with salts of quaternary ammonium bases has been carried out. The possibility of a significant increase in the separation factors of anions in the F-Cl-BПоказать полностьюr-I series due to endothermic dehydration of amine salts (Aliquat 336) in systems with “weak” proton-donor reagents, such as chloroform has been shown. In particular, the separation factors of the Cl/F pair increase by almost 15 times when going from Aliquat 336 solutions in toluene to extractant solutions in chloroform, for the Br/Cl pair, this increase is up to 5 times, and for I/Cl, about 3 times. In similar systems with additions of alcohols and phenols to the extractant (exothermic dehydration), there is a significant deterioration in the separation parameters of halides. The conclusions are confirmed by the data of 1H NMR studies, which also made it possible to establish some details of the processes of dehydration of amine salts in the studied systems.
Журнал: Separation Science and Technology
Выпуск журнала: Т. 58, № 7
Номера страниц: 1283-1294
ISSN журнала: 01496395
Издатель: Marcel Dekker Inc.