CAO Ping1,2, YANG Xiangui1,3, XIN Yang1,3, WANG Gongying1,3*
(1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China; 2. School of Chemical Engineering, Chongqing University of Technology, Chongqing 400054, China; 3. Changzhou Key Laboratory of Green Chemistry and Technology, Changzhou Institute of Chemistry, Changzhou 213164, Jiangsu, China)
Abstract: Molybdenum trioxide catalyst for the transesterification of phenyl acetate (PA) and dimethyl carbonate (DMC) to diphenyl carbonate (DPC) was prepared by a calcining method. The structure and catalytic properties of the catalyst synthesized at different temperatures were characterized by N2 absorption-desorption(BET), X-ray diffraction(XRD), scanning electron microscopy(SEM). The results showed that, the catalyst had an orthorhombic structure, with the increase of calcination temperature, the specific surface area of the catalyst was decreased, the diffraction intensity of the (110) and (021) faces decreased, and the diffraction intensity of the (020), (040), and (060) faces increased, and the face (021) and/or (110) are/is favorable to the transesterification of DMC and PA to DPC. And too high calcination temperature would deteriorate the structure and catalyst activity. Furthermore, a plausible mechanism for the transesterification of DMC and PA to DPC catalyzed by MoO3 was proposed by changing the feeding order of the materials and catalyst.
Key words: calcination temperature; molybdenum trioxide; dimethyl carbonate; phenyl acetate; diphenyl carbonate; mechanism
E-mail: gywang@cioc.ac.cn
Journal of Molecular Catalysis, Vol. 25, Issue 6, 2011, 520-526
