Reducing the Competition: A Dual-Purpose Ionic Liquid for the Extraction of Gallium from Iron Chloride Solutions.

Authors :: M M Kinsman L
A Morrison C
T Ngwenya B
B Love J
Source :: Molecules (Basel, Switzerland) [Molecules] 2020 Sep 04; Vol. 25 (18). Date of Electronic Publication: 2020 Sep 04.
Publication Year :: 2020
Abstract: The separation of gallium from iron by solvent extraction from chloride media is challenging because the anionic chloridometalates, FeCl <subscript>4</subscript> <superscript>-</superscript> and GaCl <subscript>4</subscript> <superscript>-</superscript> , display similar chemical properties. However, we report here that the selective separation of gallium from iron in HCl solution can be achieved using the dual-purpose ionic liquid methyltrioctylammonium iodide in a solvent extraction process. In this case, the reduction of Fe <superscript>3+</superscript> to Fe <superscript>2+</superscript> by the iodide counterion was found to inhibit Fe transport, facilitating quantitative Ga extraction by the ionic liquid with minimal Fe extraction from 2 M HCl.

Subjects :: Iron chemistry
Magnetic Resonance Spectroscopy
Solutions
Spectrophotometry, Ultraviolet
Chlorides chemistry
Ferric Compounds chemistry
Gallium chemistry
Ionic Liquids chemistry

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