Superbase-derived protic ionic liquid extractants for metal ion separation

Jason R. Bell; Huimin Luo; Sheng Dai

doi:10.1016/j.seppur.2014.04.023

Superbase-derived protic ionic liquid extractants for metal ion separation

Jason R. Bell, Huimin Luo, Sheng Dai

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

Solvent extraction of La³⁺ and Ba²⁺ by an ionic liquid extractant in an imidazolium-based ionic liquid diluent was investigated. Seven protic ionic liquid extractants were examined and these PILs are based on five organic superbases and either 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5- octadione (Hfod) or 1,1,1,5,5,5-hexafluoroacetylacetone (Hhfac) β-diketones as anion. For these PIL extractants, the extraction efficiencies and separation factors were found to be concentration dependent. The effects of aqueous phase acidity, extractant structure, and extractant concentration on separation properties of La³⁺ and Ba²⁺ are discussed in this paper.

Original language	English
Pages (from-to)	147-150
Number of pages	4
Journal	Separation and Purification Technology
Volume	130
DOIs	https://doi.org/10.1016/j.seppur.2014.04.023
State	Published - Jun 10 2014

Funding

This research was supported by the US-DOE Office of Science, Division of Chemical Sciences, Geosciences and Biosciences under Contract DE-AC05-0096OR22725 with Oak Ridge National Laboratory, managed by UT-Battelle, LLC. HML was partially supported by the U.S. DOE, the Office of Nuclear Physics. JRB acknowledges Oak Ridge Associated Universities (ORAU) for postdoctoral fellowships.

Keywords

Ionic liquids
Solvent extraction
β-Diketone

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10.1016/j.seppur.2014.04.023

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abstract = "Solvent extraction of La3+ and Ba2+ by an ionic liquid extractant in an imidazolium-based ionic liquid diluent was investigated. Seven protic ionic liquid extractants were examined and these PILs are based on five organic superbases and either 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5- octadione (Hfod) or 1,1,1,5,5,5-hexafluoroacetylacetone (Hhfac) β-diketones as anion. For these PIL extractants, the extraction efficiencies and separation factors were found to be concentration dependent. The effects of aqueous phase acidity, extractant structure, and extractant concentration on separation properties of La3+ and Ba2+ are discussed in this paper.",

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AU - Dai, Sheng

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AB - Solvent extraction of La3+ and Ba2+ by an ionic liquid extractant in an imidazolium-based ionic liquid diluent was investigated. Seven protic ionic liquid extractants were examined and these PILs are based on five organic superbases and either 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5- octadione (Hfod) or 1,1,1,5,5,5-hexafluoroacetylacetone (Hhfac) β-diketones as anion. For these PIL extractants, the extraction efficiencies and separation factors were found to be concentration dependent. The effects of aqueous phase acidity, extractant structure, and extractant concentration on separation properties of La3+ and Ba2+ are discussed in this paper.

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Superbase-derived protic ionic liquid extractants for metal ion separation

Abstract

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Keywords

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