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Efficient conversion of fructose to 5-hydroxymethylfurfural catalyzed by sulfated zirconia in ionic liquids / Xinhua Qi in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7985-7989 Titre : Efficient conversion of fructose to 5-hydroxymethylfurfural catalyzed by sulfated zirconia in ionic liquids Type de document : texte imprimé Auteurs : Xinhua Qi, Auteur ; Haixin Guo, Auteur ; Luyang Li, Auteur Année de publication : 2011 Article en page(s) : pp. 7985-7989 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ionic  liquid  Catalytic  reaction Résumé : An efficient process was developed for the dehydration of fructose to 5-hydroxymethylfurfural (5-HMF) in the ionic liquid (IL) 1-butyl-3-methyl imidazolium chloride ([BMIM][Cl]) by using sulfated zirconia as catalyst. A fructose conversion of 95.8% with a 5-HMF yield of 88.4% was achieved in 30 min reaction time at 100 °C. The IL and sulfated zirconia could be recycled and exhibited constant activity for 6 successive trials, and 5-HMF yields of above 60% could be kept up to 10 trials. The proposed process of using an IL with sulfated zirconia solid catalyst greatly reduces the reaction temperature required over previous works for converting fructose to 5-HMF. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332122 [article] Efficient conversion of fructose to 5-hydroxymethylfurfural catalyzed by sulfated zirconia in ionic liquids [texte imprimé] / Xinhua Qi, Auteur ; Haixin Guo, Auteur ; Luyang Li, Auteur . - 2011 . - pp. 7985-7989. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7985-7989 Mots-clés : Ionic  liquid  Catalytic  reaction Résumé : An efficient process was developed for the dehydration of fructose to 5-hydroxymethylfurfural (5-HMF) in the ionic liquid (IL) 1-butyl-3-methyl imidazolium chloride ([BMIM][Cl]) by using sulfated zirconia as catalyst. A fructose conversion of 95.8% with a 5-HMF yield of 88.4% was achieved in 30 min reaction time at 100 °C. The IL and sulfated zirconia could be recycled and exhibited constant activity for 6 successive trials, and 5-HMF yields of above 60% could be kept up to 10 trials. The proposed process of using an IL with sulfated zirconia solid catalyst greatly reduces the reaction temperature required over previous works for converting fructose to 5-HMF. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332122

Selective conversion of D-fructose to 5-hydroxymethylfurfural by ion-exchange resin in acetone/dimethyl sulfoxide solvent mixtures / Xinhua Qi in Industrial & engineering chemistry research, Vol. 47 N° 23 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9234–9239 Titre : Selective conversion of D-fructose to 5-hydroxymethylfurfural by ion-exchange resin in acetone/dimethyl sulfoxide solvent mixtures Type de document : texte imprimé Auteurs : Xinhua Qi, Auteur ; Masaru Watanabe, Auteur ; Taku M. Aida, Auteur Année de publication : 2009 Article en page(s) : p. 9234–9239 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : Selective  Conversion  D-Fructose  to  5  Hydroxymethylfurfural  Dimethyl  sulfoxide Résumé : Catalytic dehydration of D-fructose to 5-Hydroxymethylfurfural (5-HMF) in acetone/dimethyl sulfoxide solvent mixtures was studied in the presence of a strong acidic cation-exchange resin catalyst (DOWEX 50WX8−100) by microwave heating. The addition of acetone to the dimethyl sulfoxide (DMSO) solvent promoted the formation of 5-HMF from D-fructose. For a D-fructose conversion of 97.9%, the 5-HMF selectivity was 91.7% for a 20-min reaction time in 70:30 (w/w) acetone/DMSO solvent mixtures. Concentrations as high as 10 wt % D-fructose were studied, for which it was found that 5-HMF yields of 82.1% for a reaction time of 10 min could be obtained. The stability of the ion-exchange resin used as the catalyst was confirmed. Compared to pure DMSO solvent, the combination of low-boiling-point acetone with DMSO used as the reaction medium not only gives highly selective 5-HMF formation, but also improves the separation efficiency and reduces environmental risk. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801016s [article] Selective conversion of D-fructose to 5-hydroxymethylfurfural by ion-exchange resin in acetone/dimethyl sulfoxide solvent mixtures [texte imprimé] / Xinhua Qi, Auteur ; Masaru Watanabe, Auteur ; Taku M. Aida, Auteur . - 2009 . - p. 9234–9239. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9234–9239 Mots-clés : Selective  Conversion  D-Fructose  to  5  Hydroxymethylfurfural  Dimethyl  sulfoxide Résumé : Catalytic dehydration of D-fructose to 5-Hydroxymethylfurfural (5-HMF) in acetone/dimethyl sulfoxide solvent mixtures was studied in the presence of a strong acidic cation-exchange resin catalyst (DOWEX 50WX8−100) by microwave heating. The addition of acetone to the dimethyl sulfoxide (DMSO) solvent promoted the formation of 5-HMF from D-fructose. For a D-fructose conversion of 97.9%, the 5-HMF selectivity was 91.7% for a 20-min reaction time in 70:30 (w/w) acetone/DMSO solvent mixtures. Concentrations as high as 10 wt % D-fructose were studied, for which it was found that 5-HMF yields of 82.1% for a reaction time of 10 min could be obtained. The stability of the ion-exchange resin used as the catalyst was confirmed. Compared to pure DMSO solvent, the combination of low-boiling-point acetone with DMSO used as the reaction medium not only gives highly selective 5-HMF formation, but also improves the separation efficiency and reduces environmental risk. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801016s