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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
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