| 小麦秸秆加压液化制备乙酰丙酸乙酯 |
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| 引用本文： | 关倩,蒋剑春,徐俊明,王奎,冯君锋.小麦秸秆加压液化制备乙酰丙酸乙酯[J].林产化学与工业,2016(5):127-132. |
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| 作者姓名： | 关倩 蒋剑春 徐俊明 王奎 冯君锋 |
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| 作者单位： | 1. 中国林业科学研究院 林产化学工业研究所;物质化学利用国家工程实验室;国家林业局 林产化学工程重点开发性实验室;江苏省 生物质能源与材料重点实验室, 江苏 南京 210042;2. 中国林业科学研究院 林产化学工业研究所;物质化学利用国家工程实验室;国家林业局 林产化学工程重点开发性实验室;江苏省 生物质能源与材料重点实验室, 江苏 南京 210042;江苏强林生物能源材料有限公司, 江苏 溧阳 213364 |
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| 基金项目： | "十二五"农村领域国家科技计划课题(2015BAD15B06),国家自然科学基金优秀青年基金项目(31422013) |
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| 摘 要： | 以小麦秸秆为原料,浓硫酸为催化剂,乙醇为溶剂进行液化实验,分析了液化产物的组成,考察了不同条件对目标产物乙酰丙酸乙酯(EL)得率及液化率的影响。结果表明:在浓硫酸用量10%、反应温度190℃、反应时间60 min,液固比为18∶1(g∶g)条件下,小麦秸秆的液化效果较好,液化率为75%,此时EL的得率为18.11%;经红外光谱分析可知秸秆在反应过程中发生降解;液体产物中包含醛、酮、酯、酚、酸类等多种含氧化合物,纤维素降解生成葡萄糖、葡萄糖苷、乙氧基甲基糠醛等中间产物,并最终转化为乙酰丙酸乙酯。
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| 关 键 词： | 麦秸 液化 乙酰丙酸乙酯 液化率 得率 |
Preparation of Ethyl Levulinate by Pressurized Liquefaction of Wheat Straw |
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| Abstract: | The liquefaction experiments were carried out using wheat straw as raw material, concentrated sulfuric acid as catalyst and ethanol as solvent.The composition of liquefied product was analyzed, and the effects of different conditions on conversion rate and yield of the target product ethyl levulinate (EL) were examined.The results showed that optimum liquefaction conditions was catalyst dosage 10%, reaction temperature 190 ℃, reaction time 60 min, and liquid solid ratio of 18∶1 (g∶g, the same below).Under the circumstances, the yield of EL was up to 18.11% with liquefaction ratio of 75%.Degradation of wheat straw during the reaction was confirmed by infrared spectroscopic analysis.The liquid product contained aldehydes, ketones, esters, phenols, acids, and some other oxygenates.It was found that cellulose was converted into intermediate, such as glucose, glucoside, ethoxymethyl furfural, et al.They can be further transformed into ethyl levulinate. |
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| Keywords: | wheat straw liquefaction ethyl levulinate liquefaction ratio yield |
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