Application of Donnan equilibrium theory for improved bleaching process chemistry

Erkki Räsänen, Antero Laitinen, Adriaan van Heiningen, Pertti Koukkari

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

2 Citations (Scopus)

Abstract

In this work, Donnan equilibrium theory was used to predict the ionic form of the pulp after acidic washing of pulp. The results showed that the hydrolysis of hexenuronic acids could be performed utilizing the own acidity of pulp, i.e. converting the pulp to 'acidic' form by washing with acidic filtrate and water before hydrolysis. Selective hydrolysis utilizing the own acidity of pulp facilitates combination of hydrolysis and D stages and also effective recycling of bleaching filtrate.
Original languageEnglish
Title of host publication59th Appita Annual Conference and Exhibition: Incorporating the 13th ISWFPC (International Symposium on Wood, Fibre and Pulping Chemistry), Auckland, New Zealand, 16-19 May 2005
Subtitle of host publicationProceedings
PublisherAppita
Pages321-327
ISBN (Electronic)0-95855489-7
Publication statusPublished - 2005
MoE publication typeA4 Article in a conference publication
Event59th Appita Annual Conference and Exhibition: Incorporating the 13th ISWFPC (International Symposium on Wood, Fibre and Pulping Chemistry) - Auckland, New Zealand
Duration: 16 May 200519 May 2005
Conference number: 59

Publication series

SeriesAppita Annual Conference Proceedings
ISSN1443-5454

Conference

Conference59th Appita Annual Conference and Exhibition
CountryNew Zealand
CityAuckland
Period16/05/0519/05/05

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Räsänen, E., Laitinen, A., Heiningen, A. V., & Koukkari, P. (2005). Application of Donnan equilibrium theory for improved bleaching process chemistry. In 59th Appita Annual Conference and Exhibition: Incorporating the 13th ISWFPC (International Symposium on Wood, Fibre and Pulping Chemistry), Auckland, New Zealand, 16-19 May 2005: Proceedings (pp. 321-327). Appita. Appita Annual Conference Proceedings