Dan Jian, Xiaodong Guo
Solvent extraction of indium from hydrochloric acid solution using N,N-di(1-methylheptyl)acetamide (N503), di(l-methylheptyl)methyl phosphate (P350), and tributyl phosphate (TBP) diluted in sulfonated kerosene was investigated. Extraction was studied as a function of hydrochloric acid and chloride ion concentrations, organic-phase composition, initial indium concentration, phase contact time, and aqueous/organic (A/O) volumetric ratio. The extraction stoichiometry was determined by slope analysis and confirmed by Fourier-transform infrared spectroscopy. It was found that indium extraction efficiency decreased in the order: N503 > P350 > TBP. The extracted complexes with N503 and P350 were determined to be [InCl4]−[2S·H]+; the complex formed with TBP was [InCl4]−[3S·H]+, where S represents the neutral extractant species. N503 was found to be the best extractant of the three with respect to extracting indium from solutions containing a high concentration of hydrochloric acid. Almost quantitative (99%) indium extraction was obtained using 0.5 mol·L−1 N503 in three extraction stages at an A/O ratio of 2/1; 100% of the indium on the loaded organic phase was stripped by water in two stages at an A/O ratio of 1/3. Indium can therefore be extracted from hydrochloric acid and enriched in a low-acidity strip solution.
@article{a83bfa4b-5338-4613-a351-98dc2bd8635e,
title={Extraction of indium with N,N-di(1-methylheptyl)acetamide, di(l-methylheptyl)methyl phosphate, and tributylphosphate by solvent extraction in hydrochloric acid solution},
author={Dan Jian and Xiaodong Guo},
year={2020},
language={en}
}TY - JOUR TI - Extraction of indium with N,N-di(1-methylheptyl)acetamide, di(l-methylheptyl)methyl phosphate, and tributylphosphate by solvent extraction in hydrochloric acid solution AU - Dan Jian AU - Xiaodong Guo PY - 2020 LA - en ER -
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