Fractionation of biomass for cellulosic ethanol and chemical...

C - Chemistry – Metallurgy – 08 – H

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C08H 8/00 (2010.01) B01D 11/04 (2006.01) C12P 7/10 (2006.01) C12P 19/14 (2006.01) C13K 1/02 (2006.01)

Patent

CA 2714946

A process is defined for the continuous steam pretreatment and fractionation of corn cobs and low lignin lignocellulosic biomass to produce a concentrated cellulose solid stream that is sensitive to enzymatic hydrolysis. Valuable chemicals are recovered by fractionating the liquid and vapor stream composed of hydrolysis and degradation products of the hemicellulose. Cellulosic derived glucose is produced for fermentation to biofuels. A hemicellulose concentrate is recovered that can be converted to value added products including ethanol.

Le procédé ci-décrit concerne le prétraitement à la vapeur et le fractionnement en continu de rafles de maïs et d'une biomasse lignocellulosique à basse teneur en lignine pour produire un flux concentré de solides cellulosiques qui est sensible à l'hydrolyse enzymatique. Des produits chimiques particulièrement utiles sont récupérés par fractionnement du flux liquide et gazeux composé des produits d'hydrolyse et de dégradation de l'hémicellulose. Un glucose cellulosique est produit pour la fermentation jusqu'à obtention de biocarburants. Un concentré d'hémicellulose est également récupéré qui peut être converti en produits à valeur ajoutée dont l'éthanol.

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