Nanosized rare earth solid superacid SO42/TiO2-Nd2O3 was prepared and was used as a catalyst for cyclohexand dehydration to form cyclohexene.The influence of various preparation parameters such as the concentration of...Nanosized rare earth solid superacid SO42/TiO2-Nd2O3 was prepared and was used as a catalyst for cyclohexand dehydration to form cyclohexene.The influence of various preparation parameters such as the concentration of Nd3+,the concentration of H2SO4 and the calcination temperature on the catalytic activity was studied.It indicates that SO42-/TiO2-Nd2O3 has fairly high catalytic activity on the dehydration of cyclohexand and the yield of cyclohexene can reach 79.73%.The SO42-/TiO2-Nd2O3 catalytic mechanism for cyclohexand dehydration and the Nd3+ effect on the catalytic activity was also disccused.展开更多
The synthesis of isoamyl butyrate with isoamyl alcohol and butyric acid as reactants and rare-earth solid superacid SO42-/TiO2/La3+ as catalyst had been studied. The influent actors of reaction were investigated. The ...The synthesis of isoamyl butyrate with isoamyl alcohol and butyric acid as reactants and rare-earth solid superacid SO42-/TiO2/La3+ as catalyst had been studied. The influent actors of reaction were investigated. The results showed that the appropriate conditions should be: Weight of catalyst was 0. 5g (weight of butyric acid if 0. 2mol); molar ratio of isoamyl alcohol to butyric acid was 1. 8: 1; reaction time was 2. 0 h; the taking water reagent (Toluene) was 15mL. The yield of isoamyl butyrate was about 99. 0%.展开更多
The synthesis of butyl heptanoate with n butanol and heptanoic acid as reactants and the rare earth solid super acid SO 2- 4/TiO 2/La 3+ as catalyst had been sutdied.The effects of various actors on the reaction were ...The synthesis of butyl heptanoate with n butanol and heptanoic acid as reactants and the rare earth solid super acid SO 2- 4/TiO 2/La 3+ as catalyst had been sutdied.The effects of various actors on the reaction were investigated.The results showed that the appropriate conditions should be:Weight of catalyst is 0.5g(weight of heptanoic acid is 0.2mol);molar ratio of n butanol to heptanoic acid was 1.8∶1;reaction time was 2.0h;dehydrating agent (Toluene) being 15ml.The yield of butyl heptanoate was about 99.2%.展开更多
The rare-earth solid superacids-SO 2- 4/TiO 2/La 3+ were prepared by precipitation and impregnation and were characterized by IR,XRD and Hammett indicator.The synthesis of ethyl phenylacetate with ethanol and phenylac...The rare-earth solid superacids-SO 2- 4/TiO 2/La 3+ were prepared by precipitation and impregnation and were characterized by IR,XRD and Hammett indicator.The synthesis of ethyl phenylacetate with ethanol and phenylacetic acid as reactants and rare-earth solid superacid SO 2- 4/TiO 2/La 3+ (La 3+ concentration of the soak solution:0 07mol·L -1 ,the calcination temperature:500℃ and the calcination time:3h)as catalyst was studied.The results showed that the appropriate conditions were as follow:mass of catalyst 1 0g(based on 0 05 mole phenylacetic acid),n(ethanol):n(phentlacetic acid)=4 0∶1 0,reaction time 5 0h.The yield of ethyl phenylacetate was about 89 8%.展开更多
文摘Nanosized rare earth solid superacid SO42/TiO2-Nd2O3 was prepared and was used as a catalyst for cyclohexand dehydration to form cyclohexene.The influence of various preparation parameters such as the concentration of Nd3+,the concentration of H2SO4 and the calcination temperature on the catalytic activity was studied.It indicates that SO42-/TiO2-Nd2O3 has fairly high catalytic activity on the dehydration of cyclohexand and the yield of cyclohexene can reach 79.73%.The SO42-/TiO2-Nd2O3 catalytic mechanism for cyclohexand dehydration and the Nd3+ effect on the catalytic activity was also disccused.
文摘The synthesis of isoamyl butyrate with isoamyl alcohol and butyric acid as reactants and rare-earth solid superacid SO42-/TiO2/La3+ as catalyst had been studied. The influent actors of reaction were investigated. The results showed that the appropriate conditions should be: Weight of catalyst was 0. 5g (weight of butyric acid if 0. 2mol); molar ratio of isoamyl alcohol to butyric acid was 1. 8: 1; reaction time was 2. 0 h; the taking water reagent (Toluene) was 15mL. The yield of isoamyl butyrate was about 99. 0%.
文摘The synthesis of butyl heptanoate with n butanol and heptanoic acid as reactants and the rare earth solid super acid SO 2- 4/TiO 2/La 3+ as catalyst had been sutdied.The effects of various actors on the reaction were investigated.The results showed that the appropriate conditions should be:Weight of catalyst is 0.5g(weight of heptanoic acid is 0.2mol);molar ratio of n butanol to heptanoic acid was 1.8∶1;reaction time was 2.0h;dehydrating agent (Toluene) being 15ml.The yield of butyl heptanoate was about 99.2%.
文摘The rare-earth solid superacids-SO 2- 4/TiO 2/La 3+ were prepared by precipitation and impregnation and were characterized by IR,XRD and Hammett indicator.The synthesis of ethyl phenylacetate with ethanol and phenylacetic acid as reactants and rare-earth solid superacid SO 2- 4/TiO 2/La 3+ (La 3+ concentration of the soak solution:0 07mol·L -1 ,the calcination temperature:500℃ and the calcination time:3h)as catalyst was studied.The results showed that the appropriate conditions were as follow:mass of catalyst 1 0g(based on 0 05 mole phenylacetic acid),n(ethanol):n(phentlacetic acid)=4 0∶1 0,reaction time 5 0h.The yield of ethyl phenylacetate was about 89 8%.
