CHARACTERISTICS OF LIGNIN REACTIONS IN SODA COOKING OF WHEAT STRAW——PART 1 REACTION OF UNCONDENSED LIGNIN

编号 zgly0000332936

文献类型 期刊论文

文献题名 CHARACTERISTICS OF LIGNIN REACTIONS IN SODA COOKING OF WHEAT STRAW——PART 1 REACTION OF UNCONDENSED LIGNIN

学科分类 220.5570;林产化学加工学

作者 HuaminZhai  YuanzongLai 

作者单位 CollegeofChemicalEngineering 

母体文献 天津科技大学学报 

年卷期 2004,19(A02)

页码 115-118

年份 2004 

分类号 TS743 

关键词 小麦秸杆  木质素反应  苏打  碱性烹饪  不凝结木质素  纸浆  臭氧分析 

文摘内容 Characteristics of uncondensed lignin reactions in soda cooking of wheat straw were studied. Mild and intense cooking conditions were used to get the pulp sample in which lignin was dissolved physically and the pulp sample in which lignin was dissolved chemically respectively. The pulp samples were analyzed by phenolic group determination, alkaline nitrobenzene oxidation and ozonation method. The results indicated that around 90% of lignin in wheat straw is alkali-soluble at the mild conditions, is basically dissolved physically without chemical change. The phenolic group content was not changed greatly, the nitrobenzene oxidation yield only changed slightly during the mild cooking. The phenolic group content was increased obviously and uncondensed lignin content was decreased very much when the intense cooking conditions were applied and the delignification was over 90%. The lignin structure was changed greatly during this period。