The synthesis of diphenyl carbonate from dimethyl carbonate and phenol over mesoporous MoO₃/SiMCM-41

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• 作者：Zhenhuan Li ; Bowen Cheng ; Kunmei Su ; Yu Gu ; Peng Xi ; Minglin Guo
• 关键词：Diphenyl carbonate ; Dimethyl carbonate ; Methyl phenyl carbonate ; Phenol ; MoO₃/SiMCM-41
• 刊名：Journal of Molecular Catalysis A ; Chemical
• 出版年：2008
• 期刊代码：57_13811169
• 类别：ch
• 出版时间：17 June 2008
• 卷：289
• 期：1-2
• 页码：100-105
• 文件大小：873 K

摘要

The mesoporous catalyst activities of supported molybdenum oxide for diphenyl carbonate (DPC) synthesis in liquid-phase transesterification of dimethyl carbonate (DMC) and phenol were investigated. The yields of DPC and methyl phenyl carbonate (MPC) were greatly improved when MoO₃ was supported on SiMCM-41 to act as catalyst. MoO₃/SiMCM-41 catalysts were characterized by X-ray diffraction (XRD), N₂ adsorption–desorption isotherms, and Fourier transform infrared (FT-IR) spectroscopy. Characterized results revealed that the high activity sites of MoO₃/SiMCM-41 were isolated MoO₄²⁻ tetrahedral species and polymerized octahedral molybdenum oxide species. MPC formation increased with reaction time up to 4 h and then decreased thereafter, and maximum MPC yield achieved 39.6%. The decrease of MPC yield after 4 h might be ascribed to MPC disproportionation into DPC and reversible transesterification reaction.