离子液体-乙醇-水体系水热法分离毛竹组分  

Fractionation of Bamboo in Ionic Liquid-Ethanol-H_2O System by Hydrothermal Method

作　　者：孙茉莉[1] 刘钧[1] 付严[1] 常杰[1] 

机构地区：[1]华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室,广东广州510640

出　　处：《过程工程学报》2016年第1期86-92,共7页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:21476090);国家重点基础研究发展规划(973)基金资助项目(编号:2013CB228104);中央高校基本科研业务费专项资金资助

摘　　要：采用水热法与离子液体?乙醇?水体系组合处理毛竹,分析了固体产物结构.结果表明,基本实现了毛竹全组分分离,水热法预处理选择性脱除半纤维素组分的脱除率达82.88%.离子液体?乙醇?水体系中大部分木质素被溶解,而纤维素基本不发生水解,最佳工艺条件为:反应温度170℃,反应时间4 h,[AMIM]OAc:C2H6O:H2O?5:5:0.5(?),此条件下,水解残渣溶解率为43.14%,粗纤维素和粗木质素的纯度分别为91.38%和87.70%.Bamboo was fractionated by hydrothermal method in ionic liquid-ethanol-H2O system, the dissolution of hydrolysis residue in the system studied, and the structure of separated components analyzed. The results showed that the removal rate of hemicellulose was 82.88% by hydrothermal pretreatment, most of the lignin was dissolved in the solution, but the cellulose was not hydrolyzed. The optimal dissolution conditions were obtained as reaction temperature 170 ℃, reaction time 4 h, and [AMIM]OAc：C2H6O：H2O-5：5：0.5（φ）. Under these conditions, the dissolution rate of hydrolysis residue was 43.14%, and the purity of crude cellulose and crude lignin 91.38% and 87.70%, respectively.

关 键 词：毛竹 水热预处理 离子液体 分离 纤维素 木质素 

分 类 号：TQ35[化学工程]