Understanding the Nature and Reactivity of Residual Lignin for Improved Pulping and Bleaching Efficiency.

Lai, Y. Z.

Technical Information Center Oak Ridge Tennessee

关键词: Paper industry;    Bleaching;    Pulping;    Lignin;    Diphenylmethane;   

RP-ID  :  DE2002789815

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

One of the most formidable challenges in kraft pulping to produce bleached chemical pulps is how to effectively remove the last 5-10% of lignin while maintaining the fiber quality. To avoid a severe fiber degradation, kraft pulping is usually terminated in the 25-30 kappa number range and then followed by an elementally chlorine free (ECF) or a totally chlorine free (TCF) bleaching sequence to reduce the environmental impacts.