Chinese Journal of Catalysis

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Nickel(II) complex anchored on MCM-41 for the epoxidation of styrene by oxygen

YANG Gang, CHEN Xing, WANG Xiaoli, XING Weihong, XU Nanping   

  1. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China
  • Received:2013-01-23 Revised:2013-03-12 Online:2013-07-16 Published:2013-07-16
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (20576052).

Abstract: A heterogeneous catalyst, MCM-41-Ni, was synthesized by anchoring a nickel(II) Schiff base complex onto amino-modified MCM-41. The catalyst was characterized by small angle X-ray diffraction, nitrogen adsorption, infrared spectroscopy, thermal gravimetric analysis, inductively coupled plasma and C, H, N elemental analysis, and transmission electron microscopy. MCM-41-Ni showed excellent catalytic activity for the epoxidation of styrene with O2 as oxidant with high styrene conversion (95.2%) and epoxide selectivity (66.7%). The influence of reaction temperature, catalyst amount, solvent, and reaction time was studied. MCM-41-Ni showed good recyclability and can be reused four times.

Key words: Nickel Schiff base complex, MCM-41 molecular sieve, Styrene epoxidation, Molecular oxygen