title: One-pot conversion of disaccharide into 5-hydroxymethylfurfural catalyzed by imidazole ionic liquid.
abstract: Conversion of carbohydrate into 5-hydroxymethylfurfural (5- HMF), a versatile, key renewable platform compound is regarded as an important transformation in biomass-derived carbohydrate chemistry. A variety of ILs, not only acidic but also alkaline ILs, were synthesized and used as catalyst in the production of 5-HMF from disaccharide. Several factors including reaction temperature, IL dosage, solvent and reaction time,were found to influence the yield of 5-HMF from cellobiose. Of the ILs tested, hydroxy-functionalized ionic liquid (IL), 1-hydroxyethyl-3-methylimidazolium tetrafluoroborate ([AEMIM]BF4) showed the highest catalytic activity and selectivity. 5-HMF yield of 68.71% from sucrose was obtained after 6 hrs at 160 °C. At the same condition with cellobiose as substrate, 5-HMF yield was 24.73%. In addition, 5-HMF also exhibited good stablity in this reaction system. Moreover, a kinetic analysis was carried out in both acidic and alkaline IL-catalyzed system, suggesting main side reaction in the conversion of fructose catalyzed by acidic and alkaline IL was polymerization of fructose and 5-HMF degradation, respectively.
authors.affiliation: State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Yongshui
authors.initials: Y
authors.lastname: Qu
authors.affiliation: State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.|Beijing University of Chemical Technology, Beijing, 100029, China.
authors.forename: Li
authors.initials: L
authors.lastname: Li
authors.affiliation: Beijing Municipal Research Academy of Environmental Protection, Beijing, 100037, China.
authors.forename: Quanyuan
authors.initials: Q
authors.lastname: Wei
authors.affiliation: Beijing University of Chemical Technology, Beijing, 100029, China.
authors.forename: Chongpin
authors.initials: C
authors.lastname: Huang
authors.affiliation: Institute of Environmental Engineering, Faculty of Civil and Environmental Engineering, Poznan University of Technology, Berdychowo 4, 60-965, Poznan, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Oleskowicz-Popiel
authors.affiliation: State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Xu