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

1988-04-01

1989-11-14

Sneed, H. M. S.

Sugar, starch, and carbohydrates

Processes

Carbohydrate manufacture and refining

127 1, 536124, 536127, C13K 104

Patent

active

048804738

ABSTRACT:
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 solid phase to rapid pyrolysis at a temperature of 400.degree.-600.degree. 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 product 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 absorption.

REFERENCES:
patent: 2752270 (1956-06-01), Specht
patent: 2801939 (1957-08-01), Hignett et al.
patent: 4281063 (1981-07-01), Tsao et al.

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