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
At 2.0 MPa and 323 K, the epoxidation of alkenes to yield epoxides over a series of molecular sieve supported Au catalysts were employed with high efficiencies by air in the presence of aldehyde. The best results were...At 2.0 MPa and 323 K, the epoxidation of alkenes to yield epoxides over a series of molecular sieve supported Au catalysts were employed with high efficiencies by air in the presence of aldehyde. The best results were obtained when using Au/ZSM-5 as the catalyst for 1-Heptene epoxidation and the responding TOF reached to 7 978.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At 2.0 MPa and 323 K, the epoxidation of alkenes to yield epoxides over a series of molecular sieve supported Au catalysts were employed with high efficiencies by air in the presence of aldehyde. The best results were obtained when using Au/ZSM-5 as the catalyst for 1-Heptene epoxidation and the responding TOF reached to 7 978.
