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Chemistry and Industry of Forest Products ›› 2018, Vol. 38 ›› Issue (1): 53-58.doi: 10.3969/j.issn.0253-2417.2018.01.008

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Improving Conversion of Glucose Dehydration to 5-Hydroxymethylfurfural Catalyzed by Solid Acid in γ-Valerolactone/Water with NaCl as Promoter

ZHANG Qilin1, WANG Chao1, ZHANG Xueming1, YANG Guihua2, XU Feng1,2   

  1. 1. College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China;
    2. Shandong Provincial Key Laboratory of Pulp and Paper Science and Technology, Jinan 250353, China
  • Received:2017-08-05 Online:2018-02-25 Published:2018-02-28

Abstract: The degradation of glucose to produce 5-hydroxymethylfurfural (HMF),which was catalyzed by solid Brønsted acid (Amberlyst 36) with the alkali metal salts as promoters,was studied in the γ-valerolactone (GVL)/water solvent system.In particular,the effects of several elements such as different kinds and concentrations of salts,residence time,temperature,dosage of catalyst and solvent ratio of system on the conversion of glucose to HMF were investigated emphatically.The maximum yield of HMF (47.5%) was obtained under the conditions of 140 ℃,the NaCl concentration 0.3 mol/L,the solvent ratio of GVL and H2O (V(GVL):V(H2O))5:1 and 60 min.Adding alkaline metal salts resulted in a great enhancement in glucose conversion generally whereas the existence of nitrate was detrimental to HMF generation.However,the extremely high temperature,excessive catalyst dosage and residence time would lead to a negative effect on the yield of HMF.Biomass such as xylose residues in this system could be converted directly to HMF with reasonable yield of 32.5 %,which suggests that this system is potential to be industrialized.

Key words: 5-hydroxymethylfurfural, γ-valerolactone, sold acid Amberlyst 36

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