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液体离子提取烟梗木质素的研究
范明慧1, 葛少林1, 张 朝1, 谢映松1, 李全新*2
1.烟草化学安徽省重点实验室,安徽中烟工业有限责任公司,合肥 230088;2.中国科学技术大学化学物理系,安徽省生物质洁净能源重点实验室,合肥 230026
摘要:
本文研究了在温和的条件下利用四种离子液体对烟梗木质素的提取过程,结果表明1-乙基-3-甲基咪唑磷酸二乙酯盐([EMIM][DEP])的提取效果最佳. 通过80 °C的热水搅拌30 min的预处理过程可以有效脱除烟梗中含有的绝大多数糖分同时疏松了烟梗的微纤维结构,在此基础上使用[EMIM][DEP]在150 °C和反应时间4 h的条件下可以获得纯度90.21%的木质素,木质素的提取率达到85.38%.
关键词:  烟梗,预处理,木质素,离子液体
DOI:10.1063/1674-0068/31/cjcp1802022
分类号:
基金项目:
Extraction of Lignin from Tobacco Stem using Ionic Liquid
Ming-hui Fan1, Shao-lin Ge1, Zhao Zhang1, Ying-song Xie1, Quan-xin Li*2
1.Anhui Key Laboratory of Tobacco Chemistry, China Tobacco Anhui Industrial Co., LTD, Hefei 230088, China;2.Department of Chemical Physics, Key Laboratory of Urban Pollutant Conversion, Chinese Academy of Sciences, Anhui Key Laboratory of Biomass Clean Energy, University of Science and Technology of China, Hefei 230026, China
Abstract:
Lignin only accounts for about 6% of total mass in tobacco stem, but it influences the harmful substances in the side stream smoke of cigarette in a signi cant way. Traditional researches focus only on the determination of lignin content. In the present work, we investigate four typical imidazolium-based ionic liquids for efficient extraction of lignin under mild conditions and 1-ethyl-3-methylimidazolium diethylphosphate ([Emim][DEP]) shows the best results. The pretreatment of stem using water at 80 °C for 30 min can not only remove most of the sugars but also loose the micro bers. The extractive rate of lignin reaches 85.38% at 150 °C for 4 h and the purity of lignin is 90.21%.
Key words:  Tobacco stem, Pretreatment, Lignin, Ionic liquid