(694g) the Development of Hydrophobic Deep Eutectic Solvents As New Extracting Agents for Furfural and 5-Hydroxymethylfurfural from Aqueous Solutions

furfural and 5-hydroxymethylfurfural

from aqueous solutions

Carin H.J.T. Dietz^a, Maaike C. Kroon^b, Martin van Sint Annaland^a, Fausto Gallucci^a

^a Chemical Process Intensification, Dept. Chemical Engineering and Chemistry, Eindhoven University of Technology, PO Box 513, Eindhoven, Netherlands

^b The Petroleum Institute, Chemical Engineering Department, P.O. Box 2533, Abu Dhabi, United Arab Emirates

A deep eutectic solvent (DES) is a mixture of at least one hydrogen bond donor (HBD) and at least one hydrogen bond acceptor (HBA) with a much lower melting point than its constituents.^[1] It is often reported that DESs provide the same advantages as ionic liquids (ILs), with the advantage that the DESs are easier and cheaper to prepare (mixing at moderate temperatures).^[2] As DESs are formed because of hydrogen bonding interactions, almost all DESs are hydrophilic (fully miscible with water).^[1] The first hydrophobic (water-immiscible) DESs were discovered in 2015, which were a combination of decanoic acid and quaternary ammonium salts.^[3]

In this study, new hydrophobic DESs were produced, characterized and screened for the extraction capability of furfural (FF) and hydroxymethylfurfural (HMF) from aqueous solutions.. First, the thermophysical properties (density, viscosity, glass transition temperature, decomposition temperature) of these DESs were measured. Thereafter, the solubilities of various sugar-derived molecules were experimentally assessed. Finally, the extraction performance for FF and HMF from aqueous solutions was determined and compared to commonly used organic extractants. Detailed results will be presented and discussed at the conference.

[1] A. P. Abbot, G. Capper, D. L. Davies, R. K Rasheed, V. Tambyrajah “Novel solvent properties of choline chloride/urea mixtures” Chemical Communication, 2003, 70-71.

[2] M. Francisco, A. van den Bruinhorst, M.C. Kroon, Low-Transition-Temperature Mixtures (LTTMs): A New Generation of Designer Solvents, Angewandte Chemie International Edition, 2012, 52, 3074-3085.

[3] D. J. G. P. van Osch, L. F. Zubeir, A. van den Bruinhorst, M. A. A. Rocha, M. C. Kroon, Hydrophobic deep eutectic solvents as water-immiscible extractants, Green Chemistry, 2015, 17, 4518-4521.

Acknowledgements

This work was performed under the framework of InSciTe-Horizontal project and with contributions from the European Regional Development Fund (ERDF) within the framework of OP-Zuid and with contributions from the province of Brabant and Limburg and the Dutch ministry of economy.