Extraction Behavior of Rare Earths in Ion Liquid Extraction System Using 1-Butyl-3-Methyl-Imidazolium Hexafluorophosphate and Benzoyl Acetone

Abstract:

The extraction behavior of five rare earth ions (RE³⁺) was investigated in ionic liquid (IL) extraction system using 1-butyl-3-methyl-imidazolium hexafluorophosphate ionic liquid ([Bmim]PF₆) as extraction solvent and benzoyl acetone (HA) as extractant. The extraction percentage of RE³⁺ using [Bmim]PF₆ was less than 8% without HA. When sufficient HA was included in IL phase, the extraction percentage of RE³⁺ could be higher than 98%. The extracted species in the RE³⁺-[Bmim]PF₆-HA system was neutral REA₃ and the recovery of RE³⁺ extracted into [Bmim]PF6 can be achieved using the mixture of hydrazine hydrate and ethylenediamine tetraacetic acid (EDTA) as stripping agent. [Bmim]PF₆ can be recycled in the experiment.

• Periodical: Advanced Materials Research (Volumes 335-336)
• Pages: 1428-1432
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.335-336.1428
• Online since: September 2011
• Authors: Zhong Wei Pan, Chang Ma, Ying Wu Zhang, Yu Xia Huang, Xing Lin Chen, Xue Ping Zhang
• Keywords: Benzoyl Acetone, Extraction, Ionic Liquid (IL), Re³⁺

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