Method and apparatus for lignocellulose pretreatment using a...

C - Chemistry – Metallurgy – 08 – B

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C08B 15/08 (2006.01) C08B 37/14 (2006.01) C13K 1/00 (2006.01) D21C 3/04 (2006.01)

Patent

CA 2718427

Embodiments of the present invention overcome the well-known recalcitrance of lignocellulosic biomass in an economically viable manner. A process and a system are provided for the efficient fractionation of lignocellulosic biomass into cellulose, hemicellulose, and lignin. The cellulose and hemicellulose thus obtained are highly amorphous and can be readily converted into highly concentrated mixtures of five and six carbon sugars using known methods. Typical yields of sugars exceed 100 grams of sugars per liter of sugar solution. Other products, such as alcohols, can easily be prepared according to methods of the invention. The modest process conditions and low solvent/solid ratios of some embodiments of the invention require relatively low capital and processing costs.

Les modes de réalisation de la présente invention surmontent la récalcitrance bien connue de la biomasse lignocellulosique dune manière économiquement viable. La présente invention propose un procédé et un système de fractionnement efficace dune biomasse lignocellulosique en cellulose, en hémicellulose, et en lignine. La cellulose et lhémicellulose ainsi obtenues sont très amorphes et peuvent être facilement converties en mélanges très concentrés de sucres à cinq et six atomes de carbone en utilisant des procédés connus. Les rendements typiques des sucres dépassent 100 grammes de sucres par litre de solution de sucre. Dautres produits, tels que les alcools, peuvent être facilement préparés selon les procédés de linvention. Les conditions modérées du procédé et les faibles rapports solvant/solide de certains modes de réalisation de linvention nécessitent des coûts de capital et de traitement relativement peu élevés.

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