Journal
MOLECULES
Volume 25, Issue 18, Pages -Publisher
MDPI
DOI: 10.3390/molecules25184047
Keywords
ionic liquid; solvent extraction; sustainability; secondary resources; recycling; NMR spectroscopy; UV-Vis spectrophotometry
Funding
- University of Edinburgh
- Natural Environment Research Council E3-DTP [NE/L002558/1]
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The separation of gallium from iron by solvent extraction from chloride media is challenging because the anionic chloridometalates, FeCl(4)(-)and GaCl4-, 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(3+)to Fe(2+)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.
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