Method to recycle an aqueous acidic liquor used for depolymeriza

Details Method to recycle an aqueous acidic liquor used for depolymeriza Method to recycle an aqueous acidic liquor used for depolymeriza

1999-01-04

1999-12-28

Brunsman, David

Sugar, starch, and carbohydrates

Processes

Carbohydrate manufacture and refining

C07H 300, C13K 102

Patent

active

060076364

ABSTRACT:
A method to recycle aqueous acidic liquor used to form depolymerized cellulose and hemicellulose accompanying cellulose, contained in biomass, by hydrolysis in the aqueous acidic liquor. Cellulose is dissolved in the aqueous acidic liquor and then remains in place to hydrolyze cellulose to form depolymerized cellulose in the aqueous acidic liquor. The depolymerized cellulose, including dextrins, oligosaccharides, and glucose is substantially separated from the aqueous acidic liquor. The separated aqueous acidic liquor is then recycled to dissolve and hydrolyze additional cellulose to form additional depolymerized cellulose.

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Concetrated acid Hydrolysis w/Acid Reovery, Prieto, et al. 1987 Biochemical/Alcohol Fuels Program Ann. Rpt., p. A-95.
Acid Hydrolysis Research, Wright, J.D., et al., 1987 Biochemical/Alcohol Fuels Program Annual Rept. p. A-15.

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