Pulp strength enhancement by oxygen delignification
C Esteves - 2022 - diva-portal.org
2022•diva-portal.org
Oxygen delignification is widely used in the pulp and paper industry as a part of
delignification process between the kraft cook and bleaching. However, its potential has not
been fully utilized. Rather than an intermediate process between cooking and bleaching,
oxygen delignification is a strong oxidizing agent with powerful effects on the pulp
properties. In this work, the hypothesis that oxygen delignification has the potential to
improve the pulp mechanical properties was investigated. Several pulps were produced by …
delignification process between the kraft cook and bleaching. However, its potential has not
been fully utilized. Rather than an intermediate process between cooking and bleaching,
oxygen delignification is a strong oxidizing agent with powerful effects on the pulp
properties. In this work, the hypothesis that oxygen delignification has the potential to
improve the pulp mechanical properties was investigated. Several pulps were produced by …
Abstract
Oxygen delignification is widely used in the pulp and paper industry as a part of delignification process between the kraft cook and bleaching. However, its potential has not been fully utilized. Rather than an intermediate process between cooking and bleaching, oxygen delignification is a strong oxidizing agent with powerful effects on the pulp properties. In this work, the hypothesis that oxygen delignification has the potential to improve the pulp mechanical properties was investigated.
Several pulps were produced by either kraft cooking or kraft cooking combined with a subsequent oxygen delignification stage to a similar kappa number and their properties were analyzed and compared. This methodology assessed the real oxidative potential of oxygen on the final fiber properties. Total fiber charge, pulp mechanical properties, fiber morphology, swellability and fiber nanostructure, were studied.
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