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Wood Science and Technology
Published in: Wood Science and Technology 3/2011

01-08-2011 | Original

Response of Eucalyptus camaldulensis and Acacia mangium kraft pulp in different ECF bleaching options

Authors: Md. Rezaul Karim, Md. Nazrul Islam, Raimo O. Malinen

Published in: Wood Science and Technology | Issue 3/2011

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Abstract

In this study, the response of Eucalyptus camaldulensis and Acacia mangium kraft pulp to different options of ECF bleaching was investigated. Oxygen-delignified pulps of both species having similar kappa number (c.a. 12) were used. Both the pulps were prebleached using conventional ClO2 stage (D0), combined use of ClO2 and O3 (DZ), hot acid treatment before D0 (AhotD0) and hot acid treatment before (DZ) i.e., Ahot(DZ), hot ClO2 treatment (DHT) and Ahot followed by DHT (AhotDHT). All prebleached pulps were finally bleached to 90%+ ISO brightness using D1 option. The overall benefits of other options were not considerable compared to D0 and (DZ). From the ClO2 consumption point of view, for a certain species, the option Ahot(DZ) was the best. Instead of D1 in final bleaching, pressurized hydrogen peroxide (PO) was also investigated in the case of D0 and (DZ) prebleached pulps. (PO)-bleached pulp produced higher brightness stability but lower viscosity compared to D1.
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Metadata
Title
Response of Eucalyptus camaldulensis and Acacia mangium kraft pulp in different ECF bleaching options
Authors
Md. Rezaul Karim
Md. Nazrul Islam
Raimo O. Malinen
Publication date
01-08-2011
Publisher
Springer-Verlag
Published in
Wood Science and Technology / Issue 3/2011
Print ISSN: 0043-7719
Electronic ISSN: 1432-5225
DOI
https://doi.org/10.1007/s00226-010-0338-2

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