# What types of chemicals/ionic liquid could perform this type of separation? [closed]

## closed as unclear what you're asking by Martin - マーチン♦, Ben Norris, M.A.R., Loong♦, ronApr 12 '15 at 21:28

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On the first page of the article, it is mentioned that a mixture of toluene and 1-butyl-2,3-dimethylimidazolinium tetrafluoroborate, $\ce{[bmmim][BF4]}$, was used for the extraction.