Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (11): 1259-1267.DOI: 10.11944/j.issn.1000-0518.2015.11.150144

• Full Papers • Previous Articles     Next Articles

One-step Oxidation of Benzene to Phenol Catalyzed by Sodium Metavanadate-Multinitrogen Heterocyclic Schiff Base Complex Immobilized on Mesoporous Molecular Sieve MCM-41

FU Yahonga,SHI Honglia,ZHOU Guangpenga,HUI Yonghaia*(),XIE Zhengfengb*()   

  1. aKey Laboratory of Oil & Gas Fine Chemicals,Ministry of Education, Xinjiang University,Urumqi 830046,China
    bCollege of Chemistry and Chemical Engineering, Southwest Petroleum University,Chengdu 610500,China
  • Received:2015-04-22 Accepted:2015-08-20 Published:2015-11-02 Online:2015-11-02
  • Contact: HUI Yonghai,XIE Zhengfeng
  • Supported by:
    Supported by the Doctoral Fund of Xinjiang University(No.BS110111), Key Laboratory of Oil & Gas Fine Chemicals, Ministry of Education & Xinjiang Uyghur Autonomous Region, Xinjiang University(No.XJDX0908-2012-3), National College Students Innovation Experiment Program(No.201310755007)

Abstract:

2-Phenyl-1,2,3-triazoledehyde and quinoxalin-2-carboxaldehyde immobilized on mesoporous MCM-41 by imine bond respectively. Six multinitrogen heterocyclic Schiff bases(L1~L6) modified MCM-41 were synthesized. These catalysts were characterized by Fourier transform infrared spectroscopy(FT-IR), X-ray diffraction(XRD), thermogravimetric analysis(TG) and scanning electron microscopy(SEM). NaVO3 and Schiff Base complex immobilized on MCM-41 was used for catalytic oxidation of benzene to phenol. The yield of phenol was determined by gas chromatography. Reaction conditions, such as ligand, metal salt, temperature, solvent, the catalyst amount, reaction time and oxidants were systematically investigated. Under optimized conditions, the yield of phenol is up to 23.9%(more than 90% selectivity). Scaled-up(5 times) reaction test using the current catalyst system gives a good yield(23%) and selectivity(up to 90%), while catalyst shows no significant decrease of catalytic activity after 3 times recycles.

Key words: Schiff base, immobilization, mesoporous molecular sieve MCM-41, benzene, phenol, oxidation, sodium metavanadate