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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%.
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 07 mol·L -1, the calcination temperature: 500 ° C. and the calcination time: 3 h) was used as catalyst was studied. 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%.