Chinese Journal of Catalysis ›› 2011, Vol. 32 ›› Issue (12): 1812-1821.DOI: 10.1016/S1872-2067(10)60272-0

• Research papers • Previous Articles     Next Articles

Preparation of Immobilized Chromium Schiff Base Complexes and Their Catalytic Performance for Cyclohexene Epoxidation

WANG Xiaoli1, WU Gongde1,*, WANG Fang2, WEI Wei3, SUN Yuhan3   

  1. 1Department of Environment and Technology, Nanjing Institute of Technology, Nanjing 211167, Jiangsu, China; 2College of Sciences, Nanjing University of Technology, Nanjing 210009, Jiangsu, China; 3State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China
  • Received:2011-07-19 Revised:2011-08-24 Online:2011-12-21 Published:2015-04-23

Abstract: Three typical amino acid Schiff base chromium(III) complexes immobilized on MCM-41 were prepared and characterized by various physico-chemical methods such as Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, X-ray powder diffraction, N2 sorption, and elemental analysis. The obtained immobilized complexes were effective catalysts for the epoxidation of cyclohexene with 30% hydrogen peroxide and they exhibited significantly enhanced catalytic performance compared with their corresponding homogeneous analogues. Under optimal reaction conditions the highest conversion of cyclohexene was 52.6% with 73.5% epoxide selectivity. In addition, the catalytic activity was retained after recycling 6 times.

Key words: immobilized, amino acid, Schiff base complex, cyclohexene, epoxidation