Chinese Journal of Catalysis ›› 2019, Vol. 40 ›› Issue (11): 1810-1819.DOI: 10.1016/S1872-2067(19)63368-1

• Articles • Previous Articles    

Oxidative esterification of acetol with methanol to methyl pyruvate over hydroxyapatite supported gold catalyst: Essential roles of acid-base properties

Yan Wana, Congcong Zhenga, Xianchi Leia, Mengqi Zhuanga, Jinhan Lina, Wenda Hua, Jingdong Lina,c, Shaolong Wana,b,c, Yong Wangd   

  1. a College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China;
    b Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, Fujian, China;
    c National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters, Xiamen University, Xiamen 361005, Fujian, China;
    d Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99164, United States
  • Received:2019-03-27 Revised:2019-03-29 Online:2019-11-18 Published:2019-09-06
  • Contact: Shaolong Wan
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (91545114, 91545203, and 21576227), and the 985 Program of the Chemistry and Chemical Engineering disciplines of Xiamen University.

Abstract: Acetol is a major light oxygenate and readily produced from staged or fast pyrolysis of lignocellulose biomass. Herein we report that acetol can be selectively converted to methyl pyruvate, an important fine chemical, through oxidative esterification over Au-based catalysts. Detailed experimental studies showed that Au on amphoteric supports with appropriate strength and balanced ratio of acid and base sites can facilitate the desired oxidative-esterification pathway without accelerating undesired aldol-condensation or Cannizzaro reactions. In particular, hydroxyapatite (with a Ca/P ratio of 1.62) supported Au achieved 87% selectivity to methyl pyruvate at an acetol conversion of 62%.

Key words: Acetol, Acid-base properties, Gold, Hydroxyapatite, Methyl pyruvate