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Pulp Bleaching Stages and Sequences by Veera Lokesh Ayireddy is a document available to read on EtoBox.
What is Pulp Bleaching Stages and Sequences about?
There are two main approaches to chemically bleaching pulp - using selective chemicals that destroy chromophoric groups in lignin without fully removing lignin, providing around 70% brightness while retaining high pulp yield, or almost totally removing lignin to provide over 90% brightness but reducing pulp yield. Bleaching is done in stages using chemicals like chlorine, chlorine dioxide, alkaline extraction, oxygen and others at specific pH levels, temperatures and times to remove color compounds from pul
- Author
- Veera Lokesh Ayireddy
- Language
- EN