A highly efficient Pd\|BMImCl/TiO\-\%y\%\|SiO\-\%x\% catalyst system synthesized through sol\|gel method from palladium complex, ionic liquid, titanate and silicate esters was found for the oxidative carbonylation of ...A highly efficient Pd\|BMImCl/TiO\-\%y\%\|SiO\-\%x\% catalyst system synthesized through sol\|gel method from palladium complex, ionic liquid, titanate and silicate esters was found for the oxidative carbonylation of amines. The catalyst efficiency was much higher than that reported in previous papers and the TOF number reached to 10 372 when catalyst 0.05%Pd\|4.6%BMImCl/TiO\-\%y\%\|SiO\-\%x\% was used. The usability of ionic liquid was the key point for preparation of this catalyst system because of its high dissolvability to palladium complex and affording appropriate micro\|environment for the reaction. The synergism among palladium complex, ionic liquid, titanate and silicate was the main reason for the high catalytic activity of the catalyst system. BET, AES and XRD were used to characterized the catalysts in detail.展开更多
Bi2O3· 3MoO3 oxide catalyst has been prepared by the sol gel pr℃ ess at lower temperature. The influences of preparation conditions and thermal treatment conditions on the morphology and structure of the catalys...Bi2O3· 3MoO3 oxide catalyst has been prepared by the sol gel pr℃ ess at lower temperature. The influences of preparation conditions and thermal treatment conditions on the morphology and structure of the catalyst have been studied by using TEM, DTA TG, FT IR, XRD and BET surface area measurement methods. It is shown that the BET surface area of Bi2O3· 3MoO3 prepared by sol gel method is larger than that of Bi2O3· 3MoO3 prepared by coprecipitation method. For the preparation of the well distribuated Bi2O3· 3MoO3 catalyst has a BET surface area of 13.2m2· g－ 1, the optimum conditions for the catalyst are :展开更多
文摘A highly efficient Pd\|BMImCl/TiO\-\%y\%\|SiO\-\%x\% catalyst system synthesized through sol\|gel method from palladium complex, ionic liquid, titanate and silicate esters was found for the oxidative carbonylation of amines. The catalyst efficiency was much higher than that reported in previous papers and the TOF number reached to 10 372 when catalyst 0.05%Pd\|4.6%BMImCl/TiO\-\%y\%\|SiO\-\%x\% was used. The usability of ionic liquid was the key point for preparation of this catalyst system because of its high dissolvability to palladium complex and affording appropriate micro\|environment for the reaction. The synergism among palladium complex, ionic liquid, titanate and silicate was the main reason for the high catalytic activity of the catalyst system. BET, AES and XRD were used to characterized the catalysts in detail.
文摘Bi2O3· 3MoO3 oxide catalyst has been prepared by the sol gel pr℃ ess at lower temperature. The influences of preparation conditions and thermal treatment conditions on the morphology and structure of the catalyst have been studied by using TEM, DTA TG, FT IR, XRD and BET surface area measurement methods. It is shown that the BET surface area of Bi2O3· 3MoO3 prepared by sol gel method is larger than that of Bi2O3· 3MoO3 prepared by coprecipitation method. For the preparation of the well distribuated Bi2O3· 3MoO3 catalyst has a BET surface area of 13.2m2· g－ 1, the optimum conditions for the catalyst are :
