Fructose dehydration to 5-hydroxymethylfurfural over solid acid catalysts in a biphasic system.

Abstract

Different acidic heterogeneous catalysts like alumina, aluminosilicate, zirconium phosphate, niobic acid, ion-exchange resin Amberlyst-15, and zeolite MOR have been studied in fructose dehydration to 5-hydroxymethylfurfural (HMF). The acidity of these materials was characterized using temperature-programmed desorption of NH₃ and IR spectroscopy of adsorbed pyridine. The nature and strength of acid sites was shown to play a crucial role in the selectivity towards HMF. Brønsted acid sites in the case of zeolites and ion-exchange resin led to high selectivities in the dehydration of fructose with an increase in selectivity with the addition of an organic phase. Lewis acidity in the case of phosphate and oxides resulted in the intensive production of humins from fructose at the initial stages of the process, whereas organic phase addition did not affect selectivity.

• Authors: Vitaly V Ordomsky, John van der Schaaf, Jaap C Schouten, T Alexander Nijhuis
• Journal: ChemSusChem (ChemSusChem) Vol. 5 Issue 9 Pg. 1812-9 (Sep 2012) ISSN: 1864-564X [Electronic] Germany
• PMID: 22777706 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Chemical References

• Solvents
• Water
• Fructose
• 5-hydroxymethylfurfural
• Furaldehyde

Topics

• Catalysis
• Chemical Phenomena
• Fructose (chemistry)
• Furaldehyde (analogs & derivatives, chemistry)
• Hydrogen-Ion Concentration
• Solvents (chemistry)
• Water (chemistry)