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TCF bleaching of eucalypt kraft pulp with oxone
Yaqoob, N and Stack, KR and Nguyen, KL (2010) TCF bleaching of eucalypt kraft pulp with oxone. Appita Journal, 63 (5). pp. 381-386. ISSN 1038-6807
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TCF delignification and bleaching of kraft eucalypt pulp using ozone and oxone under alkaline conditions has been investigated. The pulp samples were bleached in two stages of oxone (Ox) treatment using an AZOx1Ox2 sequence. Pulp brightness greater than 84% ISO was achieved. The effects of oxone charge, alkali charge, bleaching temperature and time on the bleaching response were studied. The colour removal was determined from the chromaticity coordinates (L*, a* and b*) and 98% colour removal was achieved. Accelerated ageing experiments showed excellent brightness stability with very little brightness reversion (or thermal degradation) of the oxone treated pulp. Improvements in pulp strengths compared to ozone and acid treatments were achieved along with significant HexA removal demonstrating the feasibility of oxone in TCF bleaching.
|Keywords:||Oxone, TCF Kraft bleaching, Ozone, kappa number, and accelerated ageing|
|Journal or Publication Title:||Appita Journal|
|Page Range:||pp. 381-386|
|Additional Information:||Copyright © 2010 Appita|
|Date Deposited:||02 Mar 2011 23:59|
|Last Modified:||02 Mar 2011 23:59|
|Item Statistics:||View statistics for this item|
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