有机溶剂法纯化稻草碱木质素的研究  

STUDIES ON PURIFICATION OF ALKALI LIGNIN FROM RICE STRAW PULPING WITH ORGANIC SOLVENTS

作　　者：杨益琴[1] 李忠正[1] 

机构地区：[1]南京林业大学化工学院,江苏南京210037

出　　处：《林产化学与工业》2000年第4期40-44,共5页Chemistry and Industry of Forest Products

摘　　要：采用有机溶剂法纯化稻草碱木质素 ,研究了不同有机溶剂体系对稻草碱木质素纯化得率及纯化产品化学组成的影响 ,确定了适宜的有机溶剂体系及纯化工艺条件。实验结果表明 :丙酮 水混合溶剂为最佳的溶剂体系 ,丙酮 水 6∶4 (v/v)时 ,纯化所得碱木质素的得率为 85 2 % ,产品中木质素的含量达 4 4 86% ,糖含量下降了76 86% ,灰分含量下降了 2 0 87%Alkali lignin from rice straw pulping was purified with organic solvents. Effect of different solvents and solvent dosage on yield and composition of purified lignin were investigated. The suitable solvent system and purifying conditions were determined. The results indicated: the optimum solvent system was a mixture of acetone and water(6∶4,v/v), solvent to lignin ratio 10∶1. Under this condition, yield of lignin was 85.20%, content of lignin increased from 31.13% to 44.86% , content of total sugar and ash in purified lignin were reduced 76.86% and 20.87%, respectively.

关 键 词：稻草 有机溶剂 木质素 纯化 

分 类 号：TQ353.425[化学工程] TQ351.365