June 2014

Journal

Superbase-derived protic ionic liquid extractants for metal ion separation

By:
Bell, Jason R; Dai, Sheng ; Luo, Huimin
Journal Name:
Separation and Purification Technology
Page Number:
147-150
Volume:
130
Issue Number:
n/a
Publication Date:
June 2014
View DOI Listing:
https://doi.org/10.1016/j.seppur.2014.04.023

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 protic ILs 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 fod-based 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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