Ethyl lactate was synthesized starting from lactic acid and ethanol over solid superacid SO2-4/ZrO2-La3+ catalyst.The influence factors were investigated.The results showed that the appropriate conditions were as foll...Ethyl lactate was synthesized starting from lactic acid and ethanol over solid superacid SO2-4/ZrO2-La3+ catalyst.The influence factors were investigated.The results showed that the appropriate conditions were as follows:SO2-4/ZrO2-La3+ was made by adding ZrO2 to 1.5 mol.L-1 H2SO4 and 0.1mol.l-1La3+,immersing 24 hours,baking 2 hour at 600℃.The molar ratio of ethanol to lactic acid was 1.5∶1,reaction time was 3 hours,weight of catalyst is 2.0% of lactic acid mass.The yield of ethyl lactate reached up to 51.4%.展开更多
文摘Ethyl lactate was synthesized starting from lactic acid and ethanol over solid superacid SO2-4/ZrO2-La3+ catalyst.The influence factors were investigated.The results showed that the appropriate conditions were as follows:SO2-4/ZrO2-La3+ was made by adding ZrO2 to 1.5 mol.L-1 H2SO4 and 0.1mol.l-1La3+,immersing 24 hours,baking 2 hour at 600℃.The molar ratio of ethanol to lactic acid was 1.5∶1,reaction time was 3 hours,weight of catalyst is 2.0% of lactic acid mass.The yield of ethyl lactate reached up to 51.4%.
