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2013•Unpublished venueRequires access

Studies on Preparation of Levulinic Acid from Peanut Shells with Synergistic Hydrolysis of Ultrasonic Pretreatment and Solid Acid

Ning Zhang, Shuang Liu, Liu Dong-lian

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Abstract

Levulinic acid(LA) was prepared from peanut shells through synergistic hydrolysis using ultrasonic pretreatment cooperated with SO2-4/TiO2-Al2O3 solid acid.Based on single factor test,the effects of hydrolysis temperature,hydrolysis time and the amount of solid acid on LA yield were studied,and the response surface method(RSM) with 3 factors and 3 levels was designed.The results showed that the optimum conditions were as followed: hydrolysis temperature is 235℃,hydrolysis time is 31 min,solid acid amount is 4.5%,and liquid-solid ratio is 14 ∶ 1(mL/g).Then the LA yield gained 27.54%.Comparing with that obtained by non-ultrasonic pretreatment at the same condition,the LA yield increased by 7.18%.

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What this paper is about

Levulinic acid(LA) was prepared from peanut shells through synergistic hydrolysis using ultrasonic pretreatment cooperated with SO2-4/TiO2-Al2O3 solid acid.Based on single factor test,the effects of hydrolysis temperature,hydrolysis time and the amount of solid acid on LA yield were studied,and the response surface method(RSM) with 3 factors and 3 levels was designed.The results showed that the optimum conditions were as followed: hydrolysis temperature is 235℃,hydrolysis time is 31 min,solid acid amount is 4.5%,and liquid-solid ratio is 14 ∶ 1(mL/g).Then the LA yield gained 27.54%.Comparing with that obtained by non-ultrasonic pretreatment at the same condition,the LA yield increased by 7.18%.

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Available abstract

Levulinic acid(LA) was prepared from peanut shells through synergistic hydrolysis using ultrasonic pretreatment cooperated with SO2-4/TiO2-Al2O3 solid acid.Based on single factor test,the effects of hydrolysis temperature,hydrolysis time and the amount of solid acid on LA yield were studied,and the response surface method(RSM) with 3 factors and 3 levels was designed.The results showed that the optimum conditions were as followed: hydrolysis temperature is 235℃,hydrolysis time is 31 min,solid acid amount is 4.5%,and liquid-solid ratio is 14 ∶ 1(mL/g).Then the LA yield gained 27.54%.Comparing with that obtained by non-ultrasonic pretreatment at the same condition,the LA yield increased by 7.18%.

Key concepts: Levulinic acid, Hydrolysis, Yield (engineering), Chemistry, Acid hydrolysis, Response surface methodology, Ultrasonic sensor, Chromatography

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