Hydrophobic phosphonium-based ionic liquids as novel extractants for palladium(II) recovery from alkaline cyanide solutions
Journal of Molecular Liquids（2021）
Abstract
•Three novel phosphonium ionic liquids were synthesized and characterized.•Phosphonium ionic liquids were used to extract Pd(II) from alkaline cyanide solution.•Pd(II) was separated from the mixture metal cyanide using a two-step elution process.•The extraction mechanism was confirmed by NMR, MS, Karl Fischer titration, and DFT.
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Key words
Ionic liquids,Alkaline cyanide solutions,Palladium extraction,Ion-exchange mechanism
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