Ionic liquid with metal complexes: An efficient catalyst for selective dehydration of fructose to 5-hydroxymethylfurfural

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2014-02, Vol.237, p.95-100
• Main Authors: Chinnappan, Amutha, Jadhav, Arvind H., Kim, Hern, Chung, Wook-Jin
• Format: Article
• Language: English
• Subjects: Biomass; Carbohydrates; Catalysis; Ionic liquids with metal complexes
• ISSN: 1385-8947; 1873-3212
• DOI: 10.1016/j.cej.2013.09.106

[Display omitted] •95.5% Yield of HMF was obtained in mild condition by the dehydration of fructose.•Ionic liquid containing transition metal complexes used as catalysts.•Transition metal complexes have a remarkable effect on the dehydration of fructose.•First example of IL with metal complexes in fructose dehydration. The dehydration of D-fructose has been studied with different kinds of pyridinium based dicationic ionic liquids as catalyst. The results showed that 1,1′-hexane-1,6-diylbis (3-methylpyridinium) tetrachloronickelate (II) [C6(Mpy)2][NiCl4]2− in DMSO and 1,1′-decane-1,10-diylbis (3-ethylpyridinium) dibromide [C10(Epy)2]2Br− without DMSO have high catalytic activity. Highly efficient and selective dehydration of D-fructose to 5-hydroxymethylfurfural (HMF) was achieved in dimethyl sulfoxide (DMSO) under mild conditions with a fructose conversion of 95.6% and 95.5% HMF yield was achieved in 60min reaction time at 110°C and 87.1% yield obtained from [C10(Epy)2]2Br− without DMSO at 100°C in 90min reaction time. The ionic liquids used in this study will benefit many biofuel-related applications.