蓝桉CTMPH2O2漂白难点分析  

Preliminary Study on the Reason of the Difficulty of E. Globules CTMP to Be Bleached to High Brightness by H2O2

作　　者：李新平[1] 陈中豪[2] 

机构地区：[1]陕西科技大学造纸工程学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安710021 [2]华南理工大学,广东广州510640

出　　处：《中国造纸》2009年第B12期13-17,共5页China Pulp & Paper

摘　　要：分析了蓝桉化学热磨机械浆（CTMP）在H2O2置换漂白过程中木素中邻醌和甲氧基等功能性基团的变化，对用H2O2难于将蓝桉CTMP漂白至较高白度的原因进行了初步探索。结果表明，漂后浆木素中仍有相当数量的邻醌存在，无法用H2O2完全有效去除。漂后浆木素中甲氧基含量增加，降低了木素的反应活性，不利于H2O2对木素发色基团的脱除。The reason of the difficulty of E. globules CTMP to be bleached to high brightness by H2O2 was preliminary studied in this paper. The results showed that the amount of methoxyl in lignin increases and the reaction activity of the lignin decreases due to much more guaiacyl lignin is dissolved than syringyl lignin during H2O2 displacement bleching of E. globulus CTMP. This is unfavorable to the reaction between H2O2 and lignin chromophores. Meanwhile, considerable amount of o-quinone exists in the lignin of bleached pulp yet and cannot be removed out fully and effectively by H2O2 is one of the important reasons of why high-yield pulp cannot be bleached to high brightness only by H2O2.

关 键 词：蓝桉 CTMP H2O2漂白 高白度 

分 类 号：TS745[轻工技术与工程—制浆造纸工程]