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

Lai, Yuan-Zong

State University of New York. Research Foundation.

关键词: Lignin Residual Lignin;    Efficiency;    Fibers;    Delignification;    Bleaching;   

DOI  :  10.2172/789815
RP-ID  :  DOE/ID/13443
RP-ID  :  FC07-96ID13443
RP-ID  :  789815

美国|英语

来源: UNT Digital 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.