New product and processes from an integrated forest biorefinery

Details New product and processes from an integrated forest biorefinery New product and processes from an integrated forest biorefinery

D - Textiles, Paper

21

C

D21C 3/00 (2006.01) D21C 3/22 (2006.01) D21C 9/12 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2608090

An omnibus process of pulping and bleaching lignocellulosic materials in which a charge of a lignocellulosic material is biopulped and/or water extracted prior to pulping and bleaching. The lignocellulosic material may be mechanically pulped and bleached in the presence of an enzyme that breaks lignin-carbohydrate complexes. The aqueous extract in embodiments including a water extract step is separated into acetic acid and hemicellulose sugar aqueous solutions.

L'invention concerne un procédé général de désintégration et de blanchiment de matières lignocellulosiques dans lequel une charge d'une matière lignocellulosique est soumise à une biodésintégration et/ou à une extraction de l'eau avant la désintégration et le blanchiment. La matière lignocellulosique peut être désintégrée par voie mécanique et blanchie en présence d'une enzyme qui casse les complexes lignine-hydrate de carbone. L'extrait aqueux, dans des modes de réalisation comprenant une étape d'extraction de l'eau, est séparé en solutions aqueuses d'acide acétique et d'hémicellulose.

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