Dehydration of carbohydrates to 2-furaldehydes in ionic liquids by catalysis with ion exchange resins
The dehydration of several sugars, including pentoses, hexoses, di, tri, and polysaccharides, in ionic liquids with acidic ion-exchange resins as heterogeneous catalysts was investigated. Good 2‐furaldehydes recovery yields, reaching 92% in some cases, were achieved when Dowex® 50W ion‐exchange resins and 1‐n‐butyl‐3‐methylimidazolium chloride ([C4mim]Cl) were used. Our results show that this aproach could represent a promising route towards the cost-efficient production of 2-furaldehydes from carbohydrate-based feedstocks.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Sugar dehydration to 2-furaldehydes by heterogeneous catalysts in ionic liquids. ► Dowex® ion-exchange resins in [C4mim]Cl showed the highest dehydration yields. ► Variations of time, temperature, and catalyst were tested for process optimization. ► Mono, di, tri, and polysaccharides were assayed with good dehydration yields. ► Among pentoses, ribose showed the highest furfural yield.
Journal: Catalysis Communications - Volume 27, 5 October 2012, Pages 88–91