CaO-loaded solid base used in transesterification of rape oil was prepared by loading CaO on MgO. The base strength and content of the solid base at different preparation conditions were analyzed. The solid base belon...CaO-loaded solid base used in transesterification of rape oil was prepared by loading CaO on MgO. The base strength and content of the solid base at different preparation conditions were analyzed. The solid base belonged to superbase with the base strength of 27.0 < H- < 37.0. After dipped in 22.4% Ca(AC)2 for 1h and calcined at 700℃ for 24h, highest basic content of the solid base were achieved (H- >9.3, 25.68 mmol/g). The solid base exhibited high catalytic activity in transesterification of rape oil into bio-diesel, and the rape oil conversion reached 97.95%.展开更多
The methoxycarbonylation of amines with dimethyl carbonate using KF supported on different carriers as catalysts were studied.The effects of different catalysts,reaction time,amount of catalyst and the reusability on ...The methoxycarbonylation of amines with dimethyl carbonate using KF supported on different carriers as catalysts were studied.The effects of different catalysts,reaction time,amount of catalyst and the reusability on reactions were investigated.Results show that the KF supported on different carriers were efficient catalysts for the reactions with high yields in mild conditions.The optimum reaction condition was 1% of catalyst,reaction time 3 h.Under that condition,the average yield was over 89%.The catalytic activities did not decrease while the catalyst was recycled for eight times.展开更多
文摘CaO-loaded solid base used in transesterification of rape oil was prepared by loading CaO on MgO. The base strength and content of the solid base at different preparation conditions were analyzed. The solid base belonged to superbase with the base strength of 27.0 < H- < 37.0. After dipped in 22.4% Ca(AC)2 for 1h and calcined at 700℃ for 24h, highest basic content of the solid base were achieved (H- >9.3, 25.68 mmol/g). The solid base exhibited high catalytic activity in transesterification of rape oil into bio-diesel, and the rape oil conversion reached 97.95%.
文摘The methoxycarbonylation of amines with dimethyl carbonate using KF supported on different carriers as catalysts were studied.The effects of different catalysts,reaction time,amount of catalyst and the reusability on reactions were investigated.Results show that the KF supported on different carriers were efficient catalysts for the reactions with high yields in mild conditions.The optimum reaction condition was 1% of catalyst,reaction time 3 h.Under that condition,the average yield was over 89%.The catalytic activities did not decrease while the catalyst was recycled for eight times.