Chinese Journal of Catalysis ›› 2014, Vol. 35 ›› Issue (5): 741-747.DOI: 10.1016/S1872-2067(14)60031-0

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An efficient process for dehydration of xylose to furfural catalyzed by inorganic salts in water/dimethyl sulfoxide system

Wenju Wanga, Huiling Lia, Junli Rena, Runcang Suna,b, Jie Zhengc, Guangwei Sunc, Shijie Liua   

  1. a State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China;
    b Institute of Biomass Chemistry and Technology, Beijing Forestry University, Beijing 100083, China;
    c Liaoning Key Laboratory of Pulp and Paper Engineering, Dalian Polytechnic University, Dalian 116034, Liaoning, China
  • Received:2014-01-07 Revised:2014-01-13 Online:2014-04-18 Published:2014-04-24
  • Supported by:

    This work was supported by Guangdong Natural Science Funds for Distinguished Young Scholar (S20120011250), Program for New Century Excellent Talents in University (NCET-12-0194), Foundation for the Author of National Excellent Doctoral Dissertation of China (201169), Science and Technology Project of Guangdong Province (2011B050400015), and the Fundamental Research Funds for the Central Universities (2014ZG0003), South China University of Technology.

Abstract:

An efficient homogeneous catalytic process was developed for the dehydration of xylose to furfural using inorganic salts as catalysts in a water/dimethyl sulfoxide (DMSO) system under mild condition. The effects of the types of inorganic salts were compared. The results showed that chlorides had higher catalytic performance than other salts, and SnCl4 was the most effective chloride. The catalytic activity of paired SnCl4/LiCl catalysts was much higher than that of the single salt, and when the distribution coefficient (χSnCl4) was 0.8, the maximum furfural yield was 56.9%. The effects of the reaction conditions on the furfural yield were also investigated. The highest furfural yield, 63.0%, was achieved at 130 ℃ for 6 h under the optimized reaction conditions.

Key words: Xylose, Furfural, Inorganic salt, Stannic chloride, Lithium chloride, Dimethyl sulfoxide