Comparation of Cu-Co-Mn Mixed Oxides and Hopcalite as Support in Synthesis of Diphenyl Carbonate by Oxidative Carbonylation of Phenol

Abstract:

The difference of Cu-Co-Mn mixed oxides and hopcalite as support in synthesis of diphenyl carbonate by oxidative carbonylation of phenol was studied. The catalysts were characterized by transmission electron microscopy, scanning electron microscopy, X-ray power diffraction, and X-ray photoelectron spectroscopy. The results show that the average particle diameter of the former catalyst is about 40 nm, whereas the other catalyst is about 0.5 μm. The main crystal phase in the former catalyst is Co₂MnO₄ and Pd_0.5Pd₃O₄, which in the latter catalyst is CuMn₂O₄, CoMn₂O₄ and Pd_0.5Pd₃O₄.The oxygen atoms lose electrons and form oxygen vacancies in.Pd_0.5Pd₃O₄ and Co₂MnO₄ of the former catalyst, which destroys the crystal integrity and prompts the oxygen adsorption on the crystal surface. The oxygen atoms lose electrons and form oxygen vacancies in.Pd_0.5Pd₃O₄ of the latter catalyst. Finally, it was found that the difference of the yield and selectivity of the both catalysts was not remarkable.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 1287-1291
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.1287
• Online since: August 2013
• Authors: Hong Xia Guo, Jing De Lü, Hui Qiang Wu, Shu Juan Xiao, Jie Han
• Keywords: Cu-Co-Mn Mixed Oxides, Diphenyl Carbonate, Hopcalite, Oxidative Carbonylation

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