Study on Hydroxylated Modification of Industrial Solid Wastes-Alkali Lignin
Alkali lignin is one of the most abundant and renewable resources extracted from alkaline pulp black liquor in the paper industry. Its utilization rate is less than 10％, with a big waste and pollution in the process. We researched molecular structure of lignin to improve its properties by hydroxylated modification with hydrogen peroxide, by which, we can change the structure of alkali lignin, develop its new uses and can expand its applications. Hydroxylation of alkali lignin, which was catalyzed by ferric hydroxide with hydrogen peroxide was studied. Effects on hydroxylated modification were investigated such as reaction temperature, reaction time, weight ratio of hydrogen peroxide to lignin and weight ratio of ferric hydroxide to lignin. The results showed that the optimization conditions of hydroxylation were as follows: reaction temperature 60 ℃, reaction time 60 min, weight ratio of hydrogen peroxide to lignin 1.2, weight ratio of ferric hydroxide to lignin 1-4％. At this time, hydroxyl value was almost double that of alkali lignin. It showed that hydroxylated modification of alkali lignin was very successful.
alkali lignin hydrogen peroxide ferric hydroxide hydroxylatation
Xiaoli ZHANG Yitong ZHOU Yuan GAO Liping ZHANG
College of Material Science and Technology Beijing Forestry University, Beijing, China
国际会议
The Sixth International Conference on Waste Management and Technology(第六届固体废物管理与技术国际会议 ICWMT 6)
苏州
英文
159-162
2011-08-30（万方平台首次上网日期，不代表论文的发表时间）