Title: Task-specific ionic liquid for solubilizing metal oxides
Authors: Nockemann, Peter
Thijs, Ben
Pittois, Stijn
Thoen, Jan
Glorieux, Christ
Van Hecke, Kristof
Van Meervelt, Luc
Kirchner, Barbara
Binnemans, Koen # ×
Issue Date: 2006
Publisher: Amer chemical soc
Series Title: Journal of physical chemistry b vol:110 issue:42 pages:20978-20992
Abstract: Protonated betaine bis(trifluoromethylsulfonyl) imide is an ionic liquid with the ability to dissolve large quantities of metal oxides. This metal-solubilizing power is selective. Soluble are oxides of the trivalent rare earths, uranium(VI) oxide, zinc(II) oxide, cadmium(II) oxide, mercury(II) oxide, nickel( II) oxide, copper(II) oxide, palladium(II) oxide, lead(II) oxide, manganese(II) oxide, and silver(I) oxide. Insoluble or very poorly soluble are iron(III), manganese(IV), and cobalt oxides, as well as aluminum oxide and silicon dioxide. The metals can be stripped from the ionic liquid by treatment of the ionic liquid with an acidic aqueous solution. After transfer of the metal ions to the aqueous phase, the ionic liquid can be recycled for reuse. Betainium bis( trifluoromethylsulfonyl) imide forms one phase with water at high temperatures, whereas phase separation occurs below 55.5 degrees C ( temperature switch behavior). The mixtures of the ionic liquid with water also show a pH-dependent phase behavior: two phases occur at low pH, whereas one phase is present under neutral or alkaline conditions. The structures, the energetics, and the charge distribution of the betaine cation and the bis( trifluoromethylsulfonyl) imide anion, as well as the cation-anion pairs, were studied by density functional theory calculations.
ISSN: 1520-6106
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Design and Synthesis
Soft Matter and Biophysics
Molecular Imaging and Photonics
Biochemistry, Molecular and Structural Biology Section
× corresponding author
# (joint) last author

Files in This Item:
File Status SizeFormat
162betaineJPCB.pdf Published 772KbAdobe PDFView/Open


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science