Chinese Journal of Applied Chemistry

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Ordered Mesoporous Carbon CMK-3 Immobilized with Ionic Liquids as Efficient Catalysts for the Synthesis of Cyclic Carbonates from CO2 and Epoxides

LIU Chunyan*, XIAO Benneng   

  1. (School of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian 116029,China)
  • Received:2013-06-20 Revised:2013-07-13 Published:2014-04-10 Online:2014-04-10

Abstract: CMK-3-IL heterogeneous catalysts were synthesized using ordered mesoporous carbons CMK-3 as the support to immobilize imidazoles ionic liquids and applied to the synthesis of cyclic carbonate. The catalyst samples were characterized by X-ray powder diffraction(XRD), nitrogen adsorption-desorption, transmission electron microscopy(TEM), thermogravimetric analysis(TGA) and elemental analysis. The results show that the ionic liquids are grafted on the surface of the CMK-3 and the resultant hybrid materials retains mesoporous structure after immobilization. The nitrogen adsorption results indicate that pore volume, pore diameter and surface area of CMK-3-IL are slightly reduced. CMK-3-IL shows much higher catalytic activity. A 64% conversion of propylene oxide and a 99% selectivity of propylene carbonate can be achieved when the catalytic reaction is carried out at 120 ℃ under 2 MPa for 6 h.

Key words: heterogeneous catalysis, CMK-3-IL, immobilization, carbon dioxide, cyclic carbonate

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