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The methoxy group of beta-O-methyl glucuronic acid is central for the formation of hexenuronic acid during kraft pulping
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.ORCID iD: 0000-0002-2900-4713
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology. KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
2011 (English)In: O Papel, ISSN 0031-1057, Vol. 72, no 1, 54-65 p.Article in journal (Refereed) Published
Abstract [en]

Hexenuronic acid is created from 4-O-methyl gluc-uronic acid – a side chain group in xylan, and one of the most important hemicelluloses in both hardwood and softwood - during alkaline conditions, such as kraft pulping. Especially in hardwood kraft pulp, hexenuronic acid corresponds to a large part of the kappa number, and the presence of this component in bleached pulp causes post yellowing. In this work it is shown that glucuronic acid that lacks a methoxy group on the 4-carbon does not form hexenuronic acid under alkaline condition to the same extent as 4-O-methylglucuronic acid. This opens up novel strategies for genetic modification of the hemicellulose structures in wood cultivated for kraft pulping.

Place, publisher, year, edition, pages
2011. Vol. 72, no 1, 54-65 p.
Keyword [en]
β-elimination, bleaching, hexenuronic acid, kraft pulping, transgenic tree, xylan
National Category
Natural Sciences
Research subject
SRA - Molecular Bioscience
Identifiers
URN: urn:nbn:se:kth:diva-49739Scopus ID: 2-s2.0-84880070326OAI: oai:DiVA.org:kth-49739DiVA: diva2:460206
Note

QC 20111202. Portugese title: "O grupo metóxido ácido 4-O-metil-glucurônico é fundamental para a formação de ácido hexenurônico durante a polpação kraft"

Available from: 2011-11-29 Created: 2011-11-29 Last updated: 2014-08-12Bibliographically approved

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Lindström, Mikael

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