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
The TS-1 life in propylene epoxidation was studied in a continually slurry reactor under the condition of 40 ℃ and 0.4, 0.6 MPa. It is suggested that the single circle life of TS-1 was no less than 80 h, the conversa...The TS-1 life in propylene epoxidation was studied in a continually slurry reactor under the condition of 40 ℃ and 0.4, 0.6 MPa. It is suggested that the single circle life of TS-1 was no less than 80 h, the conversation of hydrogen peroxide was over 90%, the selectivity of propylene oxide and 1-methoxy-2-propanol was above 92.1%. The TS-1 catalyst can be regenerated in methanol, the initial activity of regenerative catalyst can’t change after the slightly deactivation in first regeneration. Element C and Ti were analyzed by XPS. The new the shift of electronic binding energy showed that Ti had been lost and deactivated in reaction, much carton deposited on the surface of TS-1, which are the main reasons of TS-1 deactivation, and the continual propylene epoxidation can be realized integrated with the thermodynamic reactor and the proper process.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The TS-1 life in propylene epoxidation was studied in a continually slurry reactor under the condition of 40 ℃ and 0.4, 0.6 MPa. It is suggested that the single circle life of TS-1 was no less than 80 h, the conversation of hydrogen peroxide was over 90%, the selectivity of propylene oxide and 1-methoxy-2-propanol was above 92.1%. The TS-1 catalyst can be regenerated in methanol, the initial activity of regenerative catalyst can’t change after the slightly deactivation in first regeneration. Element C and Ti were analyzed by XPS. The new the shift of electronic binding energy showed that Ti had been lost and deactivated in reaction, much carton deposited on the surface of TS-1, which are the main reasons of TS-1 deactivation, and the continual propylene epoxidation can be realized integrated with the thermodynamic reactor and the proper process.
