期刊论文

Isolation of Lignin from Chestnut Shell by Ethyl Acetate

中文

林业科技

1001-9499

2007

32

4

41-44

10.3969/j.issn.1001-9499.2007.04.017

湖北省科技攻关计划重大项目，编号2005AA205A02；

本校为第一机构

主要研究了乙酸乙酯水溶液质量分数(ω)、液固比(m/m)、反应温度、保温时间等因素对分离板栗壳木质素的影响.优化的工艺条件为:板栗壳经粉碎、苯醇浸提后作为反应原料,乙酸乙酯(ω))60%,液固比(m/m)为8∶1,在高压釜内于180℃保温1h;提取液经减压蒸发回收溶剂,浓缩液在80℃真空干燥,得到棕褐色的粗木质素,然后用1,4-二氧六环溶剂提纯,得到提纯木质素.同时,测定木质素的溶解性能,并对其进行红外与紫外光谱分析.

The mass fraction of ethyl acetate aqueous solution, liquid and solid ratio （m/m）, reaction temperature and time, which influenced the isolation of lignin from chestnut shell were mainly studied, and the optimal technical conditions were resulted. Chestnut shell was comminuted, and then extracted by benz -alcohol. The pretreated shell was treated in autoclave at 180 ℃ for 1 h, when liquid and solid ratio ira/m） was 8： 1, and the mass fraction of ethyl acetate 60 %. The extract was vacuum evaporated to recover the solvent. The crude lignin ...