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 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 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%.
