Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia

PP-63CONVERSION OF SACCHARIDES INTO FURANIC ALDEHYDESUSING 1-ETHYL-3-METHYLIMIDAZOLIUM HYDROGEN SULFATEAnabela A. Valente 1 , Sérgio Lima 1 , Margarida M. Antunes 1 , Patrícia Neves 1 ,Martyn Pillinger 1 , Nikolai Ignatyev 21 CICECO, Department of Chemistry, University of Aveiro, Campus de Santiago,3810-106, Aveiro. E-mail: atav@ua.pt2 PC-RL, Ionic Liquids Research Laboratory, Merck KGaA, Frankfurter Str. 250,D 64293, Darmstadt, GermanyCarbohydrates are among the most abundant organic compounds on earth andrepresent the major portion of the world's annually renewable biomass. Sources ofcarbohydrates include conventional forestry, wood processing by-products,agricultural crops and surpluses, and plants grown on degraded soils, etc. The bulkof the carbohydrate-biomass comprises di/oligo/polysaccharides (e.g.hemicelluloses, cellulose, starch, inulin, sucrose), which by hydrolysis form sugars,such as xylose, arabinose, glucose and fructose. The partial dehydration ofmonosaccharides can form furfural (FUR) from pentoses (e.g. xylose) and 5-hydroxymethyl-2-furaldehyde (HMF) from hexoses (e.g. fructose, glucose). Thesereactions may be accelerated by the use of Brönsted or Lewis acid catalysts.The one-pot hydrolysis/dehydration of mono/di/polysaccharides into FUR or HMFin the presence of an acidic ionic liquid, 1-ethyl-3-methylimidazolium hydrogensulfate ([EMIM][HSO 4 ]), at 100 °C, was investigated [1]. [EMIM][HSO 4 ] is promisingfor FUR and HMF production from xylose, fructose or related polysaccharides (e.g.84% FUR yield at 6 h from xylose; 88% HMF yield at 30 min from fructose). Betterresults were achieved with [EMIM][HSO 4 ] than with aqueous H 2 SO 4 , under similarconditions. In the case of the xylose to FUR conversion, reaction/solvent extractionand reaction/evaporation systems were investigated for simultaneous reaction andproduct separation and for both the acidic medium could be reused.References:[1]. Lima, S.; Neves, P.; Antunes, M. M.; Pillinger, M.; Ignatyev, N.; Valente, A. A., Appl. Cat. A. 2009,363, 93-99.Acknowledgements:We are grateful to the FCT, POCI 2010, OE and FEDER for funding (ProjectsPOCI/QUI/56112/2004 and PTDC/QUI/71198/2006). S.L. is grateful to the FCT for a postdoctoralgrant and P.N. for a grant from CICECO (FCT funding).155