Chinese Journal of Applied Chemistry

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Direct Oxidative Carboxylation of Styrene to Styrene Carbonate over Cobalt-containing Mesoporous Molecular Sieves(Co-MCM-41) and Tetrabutylammonium Bromide Co-catalysts

WANG Fangxiao2, ZHU Qiancheng2, XIANG Dan3, LIANG Lin4, SUN Jianmin1,2*   

  1. (1.State Key Laboratory of Urban Water Resource and Environment;
    2.Natural Science Research Center,The Academy of Fundamental and Interdisciplinary Science;
    4.School of Life Science and Technology,Harbin Institute of Technology,Harbin 150080,China;
    3.School of Science,Xi′an Jiaotong University,Xi′an 710049,China)
  • Received:2013-05-24 Revised:2013-06-15 Published:2014-03-10 Online:2014-03-10
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21073049, 21373069), New Century Excellent Talents in University(NCET-10-0064), State Key Lab of Urban Water Resource and Environment of Harbin Institute of Technology(HIT2013TS01)

Abstract: Synthesis of cyclic carbonate from styrene and CO2 gives a simple route that avoids the preliminary synthesis and isolation of epoxides. This direct synthesis route for cyclic carbonate from olefin is not only energy saving but also simple and economical. Herein, we synthesized various metal-dopped MCM-41 such as M-MCM-41(M=Co, Fe, Ni, Cu, Ti), and Co-MCM-41 catalyst showed the highest selectivity and yield to styrene epoxide among the various catalysts in the epoxidation of styrene. Then Co-MCM-41 was chosen to combine with tetrabutylammonium bromide(TBAB) to catalyze direct oxidative carboxylation in one-pot. It was found the Co-MCM-41/TBAB catalysts efficiently catalyzed the direct oxidative carboxylation of styrene to styrene carbonate. An improved styrene carbonate yield of 46.1% was obtained under mild reaction conditions of 80 ℃, 7 h, and 4 MPa CO2 pressure. It was found that Co-MCM-41 catalyzed the first epoxidation reaction and TBAB catalyzed the second cycloaddition reaction of CO2.

Key words: Co-MCM-41/tetrabutylammonium bromide, styrene, carbon dioxide, oxidative carboxylation, styrene carbonate

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