Biomass pretreatment

C - Chemistry – Metallurgy – 12 – P

Patent

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C12P 19/14 (2006.01) C08H 8/00 (2010.01) C12P 19/02 (2006.01)

Patent

CA 2680790

A method for lignocellulose conversion to sugar with improvements in yield and rate of sugar production has been developed by using ionic liquid pretreatment. This new pretreatment strategy substantially improves the efficiency (in terms of yield and reaction rates) of saccharification of lignocellulosic biomass. Cellulose and hemicellulose, when hydrolyzed into their sugars, can be converted into ethanol fuel through well established fermentation technologies. These sugars also form the feedstocks for production of variety of chemicals and polymers. The complex structure of biomass requires proper pretreatment to enable efficient saccharification of cellulose and hemicellulose components to their constituent sugars. Current pretreatment approaches suffer from slow reaction rates of cellulose hydrolysis (by using the enzyme cellulase) and low yields.

L'invention concerne un procédé de conversion de lignocellulose en sucre, comprenant des améliorations du rendement et du débit de production de sucre développé en utilisant un prétraitement de liquide ionique. Cette nouvelle stratégie de prétraitement améliore sensiblement l'efficacité (en termes de rendement et de vitesse de réaction) de la saccarification de la biomasse lignocellulosique. La cellulose et l'hémicellulose, quand elles sont hydrolysées en leurs sucres, peuvent être converties en carburant éthanol grâce à des technologies de fermentation bien établies. Ces sucres forment également les matières premières pour la production d'une grande variété de produits chimiques et de polymères. La structure complexe de la biomasse requière un prétraitement approprié pour permettre une saccharification efficace des composants de cellulose et d'hémicellulose en leurs sucres constitutifs. Les approches de prétraitement actuelles souffrent de vitesses de réaction lentes d'hydrolyse de cellulose (en utilisant l'enzyme cellulase), et de rendements faibles.

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