A comparative evaluation of low-AOX hardwood kraft pulp bleaching sequences - Some sequences are better suited to meeting the Cluster Rule

Authors
McDonough, TJ Courchene, CE Shaket, A Ragauskas, AJ Khandelwal, B Magnotta, VL
Citation
Tj. Mcdonough et al., A comparative evaluation of low-AOX hardwood kraft pulp bleaching sequences - Some sequences are better suited to meeting the Cluster Rule, PULP PAPER, 102(10), 2001, pp. 46-52
Citations number
9
Categorie Soggetti
Material Science & Engineering
Journal title
PULP & PAPER-CANADA
ISSN journal
03164004 → ACNP
Volume
102
Issue
10
Year of publication
2001
Pages
46 - 52
Database
ISI
SICI code
0316-4004(200110)102:10<46:ACEOLH>2.0.ZU;2-N
Abstract
Hardwood kraft pulp was bleached by several low-AOX sequences, with first-s tage kappa factor 0.20. All sequences employed ClO2 for delignification. so metimes in combination with ozone or chlorine. Brightening was accomplished by ClO2, supplemented in some cases by O-3 or H2O2. The sequences were cha racterized in terms of total ClO2 requirement to reach 89-90% brightness, b leached pulp viscosity, and brightness stability, effluent AOX and COD, and estimated chemical cost.