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TCF bleaching of eucalypt kraft pulp with oxone

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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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Abstract

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.

Item Type: Article
Keywords: Oxone, TCF Kraft bleaching, Ozone, kappa number, and accelerated ageing
Journal or Publication Title: Appita Journal
Page Range: pp. 381-386
ISSN: 1038-6807
Additional Information: Copyright © 2010 Appita
Date Deposited: 02 Mar 2011 23:59
Last Modified: 02 Mar 2011 23:59
URI: http://eprints.utas.edu.au/id/eprint/10623
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