Chinese Journal of Catalysis ›› 2015, Vol. 36 ›› Issue (5): 721-727.DOI: 10.1016/S1872-2067(14)60314-4

• Articles • Previous Articles     Next Articles

Oxidation of styrene to benzaldehyde by p-toluenesulfonic acid using hydrogen peroxide in the presence of activated carbon

Nianzhe Li, Yuan Gao, Xinxin Zhang, Zhanjun Yu, Lei Shi, Qi Sun   

  1. Institute of Chemistry for Functionalized Materials, Faculty of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning, China
  • Received:2014-12-25 Revised:2015-01-30 Online:2015-04-17 Published:2015-04-17
  • Contact: Qi Sun
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21173110).

Abstract:

The selective oxidation of styrene to benzaldehyde catalyzed by p-toluenesulfonic acid (p-TsOH) in the presence of activated carbon (AC) was investigated with H2O2 as the oxidant. The reaction parameters of reaction time, temperature, catalyst mass, and styrene/H2O2 molar ratios were evaluated. A strong promoting effect of AC on the p-TsOH/H2O2 system was observed. The appropriate ratio and amounts of AC and p-TsOH were an important factor. The acidity of p-TsOH does not play a significant role. p-TsOH reacted with H2O2 by a non-radical process to oxidize styrene. The function of the AC was to activate H2O2 and to help the p-TsOH/H2O2 system in styrene oxidation. The reduction of oxygen containing groups (-OH, -COOH) on AC by a high temperature treatment or introduction of -SO3H groups onto AC affected the styrene conversion. The -SO3H groups were more effective than the oxygen-containing groups on the AC in promoting styrene oxidation.

Key words: Styrene, Hydrogen peroxide, p-Toluenesulfonic acid, Activated carbon, Oxidation