Elimination of alum yellowing of aspen thermomechanical pulp through pulp washing

This invention relates to an improved process for manufacturing bleached thermomechanical aspen pulp having reduced yellow after treatment with aluminum based chemicals such as alum which are used in paper making processes. In this improved process the pulp is washed prior to, after or between the b...

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Bibliographic Details
Main Authors Kilgannon, Robin, Kane, Robert, Joy, Eileen, Dewan, Anil
Format Patent
LanguageEnglish
Published 04.03.2004
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Summary:This invention relates to an improved process for manufacturing bleached thermomechanical aspen pulp having reduced yellow after treatment with aluminum based chemicals such as alum which are used in paper making processes. In this improved process the pulp is washed prior to, after or between the bleaching stages or a combination of the foregoing.