The role of xylan and glucomannan in yellowing of kraft pulps.
1995 (English)In: Proceedings 8th Int. Symp. Wood Pulp. Chem., 1995, 43-48 p.Conference paper (Refereed)
The effects of xylan and glucomannan on the thermal stability of unbleached, partially bleached, and fully bleached pine and birch kraft pulps were studied. The choice of bleaching chems. strongly affected the brightness reversion. Compared with hydrogen peroxide or chlorine dioxide, bleaching with ozone reduced the amt. of carboxyl groups and subsequently the pc-nos. of oxygen-delignified pulps. Xylan removal reduced also the amt. of carboxyl groups in the pulps and this was reflected in improved brightness stability whereas glucomannan removal had no effect. Thus, the uronic acids bound to pulp xylan were found to participate in the brightness reversion of kraft pulps.
Place, publisher, year, edition, pages
1995. 43-48 p.
Polymer Technologies Polymer Chemistry
IdentifiersURN: urn:nbn:se:kth:diva-79826OAI: oai:DiVA.org:kth-79826DiVA: diva2:497948
International Symposium on Wood and Pulping Chemistry, 8th, Helsinki, June 6-9, 1995 (1995), 3, 43-48.
NR 201408052012-02-112012-02-092012-02-11Bibliographically approved