高温对二氧化氯脱木素的贡献

Contribution of high temperature with chlorine delignification

基于漂序为D0-Eop-D1和D0-Eo-D1的硫酸盐桉木浆ECF三段漂,研究90℃高温二氧化氯脱木素对化学品总消耗量和浆料质量的影响.实验结果表明,与常规温度(67℃)二氧化氯脱木素相比,高温二氧化氯脱木素可降低纸浆中HexA含量,并且可以在降低二氧化氯用量的前提下,获得更高粘度和强度的全漂浆.

This paper researched the influence of chlorine dioxide deliglinfication at high tem- perature（90℃） on total chemical consumption and pulp quality in D0-Eop-D1 and D0-Eo-D1 bleaching sequence. The results indicated that chlorine dioxide deliglinfication at high tem- perature could increase the reaction rate of chlorine dioxide, and thus increase delignification rate and hydrolysis of cellulose and hemicellulose, reduce final pH and HexA content after alkali extraction. For the full bleaching pulp of 90%ISO, chlorine dioxide deliglinfication at high temperature could save chlorine dioxide consumption and improve pulp viscosity and strength compared with routine bleaching temperature （67 ℃）.