Method of separating acids and sugars resulting from strong acid

Details Method of separating acids and sugars resulting from strong acid Method of separating acids and sugars resulting from strong acid

1995-06-06

1996-12-03

Lilling, Herbert J.

Sugar, starch, and carbohydrates

Processes

Carbohydrate manufacture and refining

435 99, 435100, 435105, 435803, 127 1, 127 36, 127 37, 127 463, 210665, 210673, 536 111, 536124, 536127, C13D 314, B01D 1504, C07H 100, C12P 1902

Patent

active

055803890

ABSTRACT:
A economically viable method for producing sugars using concentrated acid hydrolysis of biomass containing cellulose and hemicellulose is disclosed. The cellulose and hemicellulose in the biomass is first decrystallized and then hydrolyzed to produce a hydrolysate containing both sugars and acid. Silica present in the biomass can then be removed for further processing. The remaining solids are then subjected to a second decrystallization and hydrolyzation to optimize the sugar yields. An improved method for separating the sugars from the acid in the hydrolysate is also disclosed. The resulting sugar stream can then be fermented, using an improved method which allows both hexose and pentose sugars to be fermented simultaneously.

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