Cellulose-solvent-based lignocellulose fractionation with...

D - Textiles – Paper – 21 – F

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D21F 11/00 (2006.01) C13K 1/02 (2006.01)

Patent

CA 2647516

Embodiments of the present invention overcome the well-known recalcitrance of lignocellulosic biomass in an economically viable manner. A process and system are provided for the efficient fractionation of lignocellulosic biomass into cellulose, hemicellulose sugars, lignin, and acetic acid. The cellulose thus obtained is highly amorphous and can be readily converted into glucose using known methods. Fermentable hemicellulose sugars, low-molecular- weight lignin, and purified acetic acid are also major products of the process and system. The modest process conditions and low solvent/solid ratios of some embodiments of the invention imply relatively low capital and processing costs.

Les modes de réalisation de la présente invention surmontent le caractère récalcitrant bien connu de la biomasse lignocellulosique de manière viable sur le plan économique. On fournit un procédé et un système pour le fractionnement efficace de biomasse lignocellulosique en cellulose, sucres hémicellulosiques, lignine et acide acétique. La cellulose ainsi obtenue est hautement amorphe et peut être facilement convertie en glucose à l'aide de méthodes connues. Les sucres hémicellulosiques fermentescibles, la lignine de bas poids moléculaire et l'acide acétique purifié sont également des produits principaux du procédé et du système. Les conditions de procédé simples et les rapports solvant/matières solides faibles de certains modes de réalisation de l'invention impliquent un capital et des coûts de traitement relativement faibles.

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