介孔催化剂上苯酚和二氧化碳直接合成碳酸二苯酯

Mesoporous SiMCM-41 supported ZnCl2, ZnO, FeCl3 and Fe2O3 catalysts prepared through impregnation were characterized by 29SiNMR, ICP, XRD and UVRaman. Their behaviors on the synthesis of diphenyl carbonate (DPC) from phenol and CO2 in CCl4 were examined. The dispersion of active components, the interaction between metal and support, and changes in catalyst structure during reaction were investigated. The results proved that mesoporous SiMCM-41 was stable during reaction; when ZnCl2, ZnO, FeCl3 and Fe2O3 were loaded into SiMCM-41, the activated sites were bounded on the surface of support by the reaction with silanol groups of pore wall in the molecular sieves, which prevented them from leaching out of catalyst. Among the catalysts examined, ZnO/SiMCM-41 exhibited the highest yield and selectivity for DPC synthesis.