AN IMPROVED METHOD FOR ISOLATING RESIDUAL KRAFT LIGNIN IN HIGH YIELD AND PURITY

编号 zgly0000332935

文献类型 期刊论文

文献题名 AN IMPROVED METHOD FOR ISOLATING RESIDUAL KRAFT LIGNIN IN HIGH YIELD AND PURITY

学科分类 220.5570;林产化学加工学

作者 ShubinWu  DimitrisS.Argyropoulos 

作者单位 StateKeyLaboratoryofPulpandPapermakingEngineering 

母体文献 天津科技大学学报 

年卷期 2004,19(A02)

页码 108-114

年份 2004 

分类号 TS74 

关键词 牛皮纸纸浆  残余木质素  分离  磁谐振光谱  无失真增益  偏振转移  还原分裂  高产高纯技术 

文摘内容 When washed pulps is milled and ground to a fine powder, the resulting material may easily be degraded by cellulolytic enzymes. The klason and UV lignin content of the solid residuals obtained in this step were 49.9% lignin for spruce KP, and 21.4% for poplar KP. The solid residuals from enzymatic treatment contained about 93.3% and 90.7% of the lignin originally presented in the spruce KP and poplar KP respectively. The enzymatic treated residual was then subjected to mild acidolysis, which caused the cleavage of lignin-carbohydrate linkages. The resulting Ground Enzymatic/Acidolysis KraftLignin (GEA-KL) is of significantly higher yield than our previous two-step (enzymatic/acidolysis) residual kraft lignin (EA-KL). The improved method offers kraft lignin preparations in higher yield and purity than any other known method with minimal work up and solvent requirements. DFRC/quantitative P NMR protocol and quantitative DEPT edited C RMR were used for characterizing of RKLs。