文献类型：期刊文献

中文题名：农作物秸秆加压液化制备乙酰丙酸乙酯及其分离初探

英文题名：Preliminary Study on Pressurized Liquefaction of Three Crops Straw for Preparation of Ethyl Levulinate

作者：关倩[1,2,3,4] 蒋剑春[1,2,3,4,5] 徐俊明[1,2,3,4,5] 王奎[1,2,3,4,5] 冯君锋[1,2,3,4]

第一作者：关倩

机构：[1]中国林业科学研究院林产化学工业研究所;[2]生物质化学利用国家工程实验室;[3]国家林业局林产化学工程重点开放性实验室;[4]江苏省生物质能源与材料重点实验室;[5]江苏强林生物能源材料有限公司

年份：2016

卷号：36

期号：4

起止页码：128-134

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金："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)

语种：中文

中文关键词：农作物秸秆;加压液化;乙酰丙酸乙酯;蒸馏分离

外文关键词：crops straw ; pressurized liquefaction ; ethyl levulinate ; distillation separation

分类号：TQ35;TK6

摘要：分别选取小麦、玉米和水稻等3种农作物的秸秆为原料,乙醇为溶剂,98%浓硫酸为催化剂,在反应压力2.25 MPa,反应温度200℃,催化剂用量5%,反应时间60 min和固液比1∶15(质量比)的条件下,进行加压液化的初步研究,对液化产物进行分析,并分离得到液化产物中的乙酰丙酸乙酯(EL)。结果显示:同等液化条件下,所选原料中小麦秸秆的液化效果最好;FT-IR、TG-DTG和SEM分析表明液化过程中小麦秸秆组分的结构发生改变和降解,液化产物的主要组分为EL,在水相的乙酸乙酯萃取液中EL的GC含量为52.61%;在蒸馏分离的过程中,EL的纯度可达92.71%,回收率达89.93%。
Three kinds of crops （wheat, corn and rice） straw were selected as raw materials for pressurized liquefaction. Ethanol and concentrated sulfuric acid （98%） were used as solvent and catalyst, respectively. The liquefaction was carried out under the conditions of reaction temperature 200 ~C, the dosage of catalyst 5% , the reaction time 60 min and the solid-liquid ratio 1 ： 15. Products of liquefaction were analyzed, and ethyl levulinate （EL） was isolated from the liquefaction products. The results showed that under the same liquefaction conditions, wheat straw performed high liquefied performance. The structure of straw components was changed and degraded. Ethyl levulinate was the main component of liquefaction products. The purity and recovery rate of ethyl levulinate isolated by distillation were 92.71% and 89.93% , respectively.