Citation:
CAO Ping, YANG Xian-Gui, XIN Yang, WANG Gong-Ying. Mo-Ti Composite Oxide Catalyst for Transesterification of Dimethyl Carbonate and Phenyl Acetate to Diphenyl Carbonate[J]. Chinese Journal of Inorganic Chemistry,
;2013, 29(4): 747-752.
doi:
10.3969/j.issn.1001-4861.2013.00.047
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The Mo-Ti composite oxide catalyst was prepared by sol-gel method and used for the transesterification of dimethyl carbonate (DMC) and phenyl acetate (PA) to diphenyl carbonate (DPC). The effect of the molar ratio of Mo/Ti and reaction conditions on the catalytic performance was investigated. The catalyst with a Mo/Ti molar ratio of 2.5 shows the highest activity. When the reaction is carried out at 180℃, with a molar ratio of PA to DMC of 2:1, the reaction time of 4 h, a catalyst amount of 0.08 (weight ratio to PA), the conversion of DMC is 74.0%, and the selectivity of DPC and MPC is 45.5% and 51.0%, respectively. According to the surface and X-ray diffraction results, lager specific areas result in improved catalytic performance by the addition of TiO2. The Mo-Ti composite oxide is composed of α-MoO3 and highly dispersed amorphous titania and/or new crystal phase of Mo-Ti composite oxide.
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