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Licensed Unlicensed Requires Authentication Published by De Gruyter March 21, 2013

Biorefinery in a pulp mill: simultaneous production of cellulosic fibers from Eucalyptus globulus by soda-anthraquinone cooking and surface-active agents

Marion Sanglard, Christine Chirat, Bevan Jarman and Dominique Lachenal
From the journal Holzforschung

Abstract

Industrial Eucalyptus globulus wood chips were submitted to different autohydrolysis conditions followed by kraft cooking and soda-anthraquinone cooking. The autohydrolyzed wood chips were much easier to delignify than the control wood chips. Soda-anthraquinone cooking could be performed at a cooking temperature that was 20°C lower than that for the kraft cooking on control wood chips. Furthermore, the active alkali could be reduced. The resulting unbleached pulps reacted as well to oxygen delignification as the control pulps and could be further bleached to 90% ISO brightness with a D(EP)D sequence. The autohydrolysis liquors were investigated for their suitability as a source for the synthesis of alkylpolyxylosides (APX). These surface-active agents are synthesized through the reaction between the saccharides of the autohydrolysates and a fatty alcohol, with the former being the hydrophilic and the latter being the hydrophobic part of the molecule. The impact of the substances detected in autohydrolysates on the APX synthesis was studied. It was demonstrated that lignin dissolved during autohydrolysis should at least partially be removed before the production of APX.


Corresponding author: Christine Chirat, LGP2 (Laboratory of Pulp and Paper Science and Graphic Arts), Grenoble INP (Pagora), CNRS (UMR 5518), 461 rue de la papeterie, BP 65, 38402 Saint Martin d’Hères Cedex, France

The authors would like to thank Marie-José Villette (Fibre Excellence), Sébastien Kerverdo, André Benattar, Jérôme Guilbot, and Stéphane Dessilla (SEPPIC) for their collaboration and precious advices during the project. The French Research Agency (ANR) is also thanked for the funding of the SUCROL project. The funding for this project was also provided by a grant from la Region Rhône-Alpes.

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Received: 2012-10-30
Accepted: 2013-2-14
Published Online: 2013-03-21
Published in Print: 2013-07-01

©2013 by Walter de Gruyter Berlin Boston

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