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Journals Holzforschung - International Journal of the... Volume 24 Issue 5

Bd. 24 (1970) H. 5 J. Doucet et A. Robert, Utilisation du Dimethylsulfoxyde ä la Delignification de Bois de Bouleau I. Utilisation du Dimethylsulfoxyde a la Delignification de Bois de Bouleau L Etüde des Conditions de Traitement et des Pätes Obtenues par J. Doucet et A. Robert*) Utilisation du Dimethylsulfoxyde ä la Delignification de Bois de Bouleau. I. Etude des Conditions de Traitement et des Pätes Obtenues Mots-cles Solvants organiques (DMSO) Delignification Blanchiment Cellulose Hemicellulose Sciure industrielle Bouleau Cette etude a permis de mettre en evidence la necessite de faire agir le dimethylsulfoxyde en presence de traces d'acide mineral meme dans le cas d'essences de bois feuillus, telles que le bouleau. Un autre facteur important est la temperature, celle-ci doit etre superieure ou egale ä I4O°C. Cette remarque a permis de montrer que les solutions aqueuses de dimethylsulfoxyde sont egalement de bons agents de delignification, jusqu'ä la proportion d'eau de 50%. Ces traitements doivent alors s'effectuer en autoclave, le point d'ebullition de tels melanges etant trop peu eleve. Parallelement ä la mise en solution de la lignine, nous avons egalement dans tous les cas, la mise en solution d'une fraction importante d'hemiceUuloses. L'etude cinetique, ä cöte des renseignements

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Utilisation du Diméthylsulfoxyde à la Délignification de Bois de Bouleau. I. Étude des Conditions de Traitement et des Pâtes Obtenues

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  • Publisher Walter de Gruyter
  • Copyright Copyright © 2009 Walter de Gruyter
  • ISSN 0018-3830
  • eISSN 1437-434X
  • D.O.I. 10.1515/hfsg.1970.24.5.163
  • Publisher site Get PDF  

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