Catalytic Dehydration of Carbohydrates on In Situ Exfoliatable Layered Niobic Acid in an Aqueous System under Microwave Irradiation. Issue 5 (18th April 2013)

• Record Type: Journal Article
• Authors: Wu, Qingbin; Yan, Yani; Zhang, Qian; Lu, Jinhua; Yang, Zhijian; Zhang, Yahong; Tang, Yi
• Is Part Of: ChemSusChem. Volume 6:Issue 5(2013:May)
• Page Start: 820
• Page End: 825
• Publication Date: 2013-04-18
• Subjects: Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201300004
• Languages: English
• ISSNs: 1864-5631

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A simple and efficient microwave‐assisted HNb₃O₈ catalytic process is proposed for the dehydration of carbohydrates in the aqueous phase. A 5‐hydroxymethylfurfural (HMF) yield of 55.9 % was achieved at a high substrate/catalyst weight ratio of 50 from a 10 wt % fructose solution, which is close to the yield achieved by homogeneous aqueous systems. The critical factor for this performance is the fast in situ exfoliation of layered HNb₃O₈ with the aid of microwave irradiation, which leads to quasi‐homogeneous catalytic behavior. Importantly, the catalytic system is also applicable for the one‐pot production of HMF from di‐ and polysaccharides, such as inulin, through a consecutive hydrolysis–dehydration reaction. Additionally, the unique restacking feature of the exfoliated HNb₃O₈ ensures the good reusability of the catalyst.</p> </abstract>