The efficient liquid-phase oxidation of aromatic hydrocarbons by molecular oxygen in the presence of MnCO3

✍ Scribed by Jin Gao; Xinli Tong; Xiaoqiang Li; Hong Miao; Jie Xu

• Publisher: Wiley (John Wiley & Sons)
• Year: 2007
• Tongue: English
• Weight: 168 KB
• Volume: 82
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/jctb.1717

✦ Synopsis

Abstract

BACKGROUND: The liquid‐phase catalytic oxidation of aromatic hydrocarbons by molecular oxygen is a commercially important process. We consider the MnCO~3~‐promoted oxidation of toluene to produce benzaldehyde and benzoic acid. In this investigation, toluene was oxidized with 25.0% conversion and 80.8% selectivity with respect to benzoic acid in the presence of MnCO~3~ under 1.0 MPa of oxygen at 190 °C for 2 h.

RESULTS: Moreover, the oxidation of other aromatic hydrocarbons, such as ethylbenzene, p‐xylene, m‐xylene, o‐xylene, and p‐chlorotoluene, were also efficiently promoted by MnCO~3~.

CONCLUSION: It is concluded that an efficient oxidation of aromatic hydrocarbons can be achieved in the presence of MnCO~3~ under solvent‐free conditions. The catalytically active species are high‐valence Mn generated via the action of MnCO~3~ with oxygen. Copyright © 2007 Society of Chemical Industry