Process for the production of fermentable sugars from biomass

Details Process for the production of fermentable sugars from biomass Process for the production of fermentable sugars from biomass

C - Chemistry, Metallurgy

13

K

260/232

C13K 1/02 (2006.01) C13K 13/00 (2006.01)

Patent

CA 1330991

TITLE PROCESS FOR THE PRODUCTION OF FERMENTABLE SUGARS FROM BIOMASS INVENTORS DONALD STRONG SCOTT JAN PISKORZ ABSTRACT OF THE DISCLOSURE A process for the production of fermentable sugars from wood or other cellulose-containing biomasses, comprises the steps of a) hydrolysing the biomass with a dilute sulfuric acid to dissolve hemicellulose while leaving most of cellulose in a solid phase, b) separating the cellulose-containing solid phase, c) subjecting the so- lid phase to rapid pyrolysis at a temperature of 400- 600°C at atmospheric pressure, preferably in a fluidized bed reactor with a short vapor residence time, to obtain a crude pyrolysis product by condensing the pyrolytic vapors, d) adjusting the water content of the crude pro- duct to form an aqueous phase with high carbohydrate content and a water-insoluble phase containing lignin- derived material, and e) separating the aqueous phase. Optionally, the aqueous phase may be purified, e.g. by adsorption.

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