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

✍ Scribed by Zhenhuan Li; Bowen Cheng; Kunmei Su; Yu Gu; Peng Xi; Minglin Guo

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 874 KB
• Volume: 289
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/j.molcata.2008.04.018

✦ Synopsis

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 MoO 3 was supported on SiMCM-41 to act as catalyst. MoO 3 /SiMCM-41 catalysts were characterized by X-ray diffraction (XRD), N 2 adsorption-desorption isotherms, and Fourier transform infrared (FT-IR) spectroscopy. Characterized results revealed that the high activity sites of MoO 3 /SiMCM-41 were isolated MoO 4 2-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.