CAO Ping1,2, YANG Xiangui1,3, XIN Yang1,3, WANG Gongying1,3
(1.Chengdu Institute of Organic Chemistry, the 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 & Technology, Changzhou Institute of Chemistry, Changzhou 213164, Jiangsu, China)
Abstract: α-MoO3 catalyst used for the synthesis of diphenyl carbonate (DPC) by transesterification of dimethyl carbonate (DMC) with phenyl acetate, was prepared by direct calcination of (NH4)6MoO7O24•4H2O at 400˚C in air. The characteristic of the morphology and structure of the catalysts before and after deactivation were carried out by using Brunauer-Emmet-Teller (BET), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), fourier infrared spectrum (FT-IR), scanning electron microscope (SEM). The results indicate that the face (110) and/or (021) of α-MoO3 is/are favorable to the transesterification of DMC and PA, after used several times, amorphous carbon physical deposited on the surface of α-MoO3, the BET surface area decreased, and the face (110) and (021) decreased, and the distribution of catalyst particles were changed, thus resulting in the deactivation of the catalysts.
Key words: molybdenum trioxide; dimethyl carbonate; phenyl acetate; diphenyl carbonate; deactivation.
E-mail: gywang@cioc.ac.cn
Journal of Molecular Catalysis, Vol. 26, Issue 5, 2012, 430-435
