Guaiacol demethoxylation catalyzed by Re2O7 in ethanol

Research output: Contribution to journalArticleScientificpeer-review


  • Fei Yan
  • Yushuai Sang
  • Yunfei Bai
  • Kai Wu
  • Kai Cui
  • Zhe Wen
  • Fuhang Mai
  • Zewei Ma
  • Linhao Yu
  • Hong Chen
  • Yongdan Li

Research units

  • Tianjin University
  • State Key Laboratory of Chemical Engineering (Tianjin University)


Re2O7 is used to convert guaiacol in alcohols at 280–320 °C. In ethanol, guaiacol is deoxygenated and alkylated, and the major products are phenol and alkylphenols (including ethylphenol, diethylphenol, diisopropylphenol, di-tert-butylphenol and 2,6-di-tert-butyl-4-ethylphenol), accounting for 97 mol% of all products after 6 hour reaction at 320 °C. Both catechol and phenol are the intermediates of guaiacol demethoxylation. Among the substituents, ethyl is directly provided by ethanol while isopropyl and tert-butyl are formed by the addition of methyl to ethyl step by step. In addition, Re2O7 has negligible activity for the saturation of benzene ring so it does not cause considerable over-consumption of reductant. The actual catalyst for guaiacol demethoxylation is likely a ReIV−VI species.


Original languageEnglish
JournalCatalysis Today
Publication statusPublished - 1 Jan 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Alkylation, Demethoxylation, Ethanol, Guaiacol, ReO

ID: 36172620