摘要
研究了具有氧化还原性的氢醌类化合物作为氧脱木素过程的添加物。结果表明 ,氢醌的加入可以降低纸浆的卡伯值 ,提高氧脱木素的选择性。其原因是氢醌的存在可以提高O2 转化成为含氧的活性反应产物 ,加速木素中甲氧基的脱除 ,有利于破坏木素的结构和脱除木素。
The reductive compounds, especially compounds with hydroquinone structure,take an important role in alkaline oxygen delignification system to improve the selectivity of lignin removal. The reason is that these compounds are benefit to increase the oxygen active species in the oxygen delignification system, which can accelerate demethoxylation and to destroy lignin. The compounds in liquor after oxygen delignification were analyzed by Py-GC_MS to show that hydroquinone compounds can improve lignin removal and protect cellulose while hemicellulose is removed with lignin.
出处
《中国造纸学报》
CAS
CSCD
北大核心
2004年第2期32-36,共5页
Transactions of China Pulp and Paper
