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Study on synthesis of ethyl lactate utilizing SO~(2-)_4/ZrO_2/La~(3+) as catalyst

Jing Gao, Liya Zhou

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Abstract

Ethyl lactate was synthesized starting from lactic acid and ethanol over solid superacid SO~(2-)_4/ZrO_2-La~(3+) catalyst.The influence factors were investigated.The results showed that the appropriate conditions were as follows:SO~(2-)_4/ZrO_2-La~(3+) was made by adding ZrO_2 to 1.5 mol.L~(-1) H_2SO_4 and 0.1mol.l~(-1)La~(3+),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%.

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What this paper is about

Ethyl lactate was synthesized starting from lactic acid and ethanol over solid superacid SO~(2-)_4/ZrO_2-La~(3+) catalyst.The influence factors were investigated.The results showed that the appropriate conditions were as follows:SO~(2-)_4/ZrO_2-La~(3+) was made by adding ZrO_2 to 1.5 mol.L~(-1) H_2SO_4 and 0.1mol.l~(-1)La~(3+),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%.

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Available abstract

Ethyl lactate was synthesized starting from lactic acid and ethanol over solid superacid SO~(2-)_4/ZrO_2-La~(3+) catalyst.The influence factors were investigated.The results showed that the appropriate conditions were as follows:SO~(2-)_4/ZrO_2-La~(3+) was made by adding ZrO_2 to 1.5 mol.L~(-1) H_2SO_4 and 0.1mol.l~(-1)La~(3+),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%.

Key concepts: Superacid, Lactic acid, Catalysis, Ethyl lactate, Ethanol, Yield (engineering), Molar ratio, Chemistry

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