有机溶剂法纯化稻草碱木质素的研究

Abstract

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:

TQ351.36⁺5

YANG Yi-qin;LI Zhong-zheng . STUDIES ON PURIFICATION OF ALKALI LIGNIN FROM RICE STRAW PULPING WITH ORGANIC SOLVENTS[J]. , 2000, 20(04): 40-44.

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

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