Welcome to Chemistry and Industry of Forest Products,

›› 2000, Vol. 20 ›› Issue (04): 40-44.

• 研究报告 • Previous Articles     Next Articles

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

YANG Yi-qin, LI Zhong-zheng   

  1. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China
  • Received:2000-05-08 Revised:1900-01-01 Online:2000-12-30 Published:2000-12-30

Abstract: 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.

Key words: rice straw, organic solvent, lignin, purificat

CLC Number: