Research on Chemical Intermediates

, Volume 40, Issue 3, pp 1303–1311 | Cite as

Liquid-phase oxidation of 2-methoxy-p-cresol to vanillin with oxygen catalyzed by a combination of CoCl2 and N-hydroxyphthalimide

  • Yuecheng Zhang
  • Xiujuan Li
  • Xiaohui Cao
  • Jiquan Zhao


Liquid-phase oxidation of 2-methoxy-p-cresol to vanillin (4-hydroxy-3-methoxybenzaldehyde), in methanol, with molecular oxygen at atmospheric pressure as oxidant and a combination of cobaltous chloride and N-hydroxyphthalimide (NHPI) as catalyst, has been investigated. The effect of reaction conditions on conversion and selectivity for vanillin was studied systematically. Selectivity for vanillin could be enhanced by optimizing the molar ratio of 2-methoxy-p-cresol to NHPI, the amount of sodium hydroxide, reaction time, reaction temperature, and the volume of methanol, which determined the concentration of the reactants. Under the optimized conditions the yield of vanillin was 90.1 %.


2-Methoxy-p-cresol Vanillin Oxidation Molecular oxygen Cobaltous chloride N-hydroxyphthalimide 






The authors are grateful for financial support from the National Natural Science Foundation of China (no. 21276061).


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Yuecheng Zhang
    • 1
  • Xiujuan Li
    • 1
  • Xiaohui Cao
    • 1
  • Jiquan Zhao
    • 1
  1. 1.School of Chemical Engineering and Technology, Hebei University of TechnologyTianjinPeople’s Republic of China

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