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Molecules 2012, 17(4), 3690-3707; doi:10.3390/molecules17043690

Coupling of Nanoporous Chromium, Aluminium-Containing Silicates with an Ionic Liquid for the Transformation of Glucose into 5-(Hydroxymethyl)-2-furaldehyde

Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
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Received: 17 February 2012 / Revised: 6 March 2012 / Accepted: 20 March 2012 / Published: 26 March 2012
(This article belongs to the Special Issue Ionic Liquids)
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Abstract

Micro/mesoporous chromium, aluminium-containing silicates of the type TUD-1 (Al-TUD-1, Cr-TUD-1, CrAl-TUD-1) and zeolite BEA, Cr-BEA, and related composites BEA/TUD-1 and Cr-BEA/TUD-1, were prepared, characterised, and tested as solid acids coupled with the ionic liquid (IL) 1-butyl-3-methylimidazolium chloride ([bmim]Cl) as solvent, in the transformation of d-glucose into 5-(hydroxymethyl)-2-furaldehyde (Hmf), at 120 °C. The chromium-containing catalytic systems lead to considerably higher Hmf yields in comparison to the related systems without chromium. The IL is a favourable solvent for this target reaction (in terms of Hmf yields reached) compared to water or dimethylsulfoxide. A detailed study on the stabilities of the nanoporous solid acids in the IL medium is presented.
Keywords: glucose; 5-(hydroxymethyl)-2-furaldehyde; ionic liquid; solid acids glucose; 5-(hydroxymethyl)-2-furaldehyde; ionic liquid; solid acids
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Antunes, M.M.; Lima, S.; Pillinger, M.; Valente, A.A. Coupling of Nanoporous Chromium, Aluminium-Containing Silicates with an Ionic Liquid for the Transformation of Glucose into 5-(Hydroxymethyl)-2-furaldehyde. Molecules 2012, 17, 3690-3707.

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