Process for the acid hydrolysis of carbohydrate polymers and the

Details Process for the acid hydrolysis of carbohydrate polymers and the Process for the acid hydrolysis of carbohydrate polymers and the

1979-06-25

1980-12-30

Shapiro, Lionel M.

Chemistry: molecular biology and microbiology

Micro-organism, tissue cell culture or enzyme using process...

Preparing oxygen-containing organic compound

435 42, 435165, 435813, 435940, 435942, C12P 714

Patent

active

042424550

ABSTRACT:
A carbohydrate polymer such as starch and/or cellulose is converted to ethanol by a process in which an aqueous slurry of the carbohydrate polymer acid hydrolyzed to provide a sterile fermentable sugar solution is thereafter continuously converted by fermentation to dilute aqueous ethanol ("beer") in a series of agitated fermentations vessels which contain progressively more ethanol and less fermentable sugar employing at least two strains of yeast for the fermentation, one of which provides a high rate of ethanol production in a fermentation medium containing a relatively low concentration of ethanol and a relatively high concentration of fermentable sugar and the other of which provides a high rate of ethanol production in a fermentation medium containing a relatively high concentration of ethanol and a relatively low concentration of fermentable sugar.

REFERENCES:
patent: 2419960 (1947-05-01), Legg
patent: 2431004 (1947-11-01), Wickerham
patent: 3337414 (1967-08-01), Wilson
patent: 4009075 (1977-02-01), Hoge
patent: 4132595 (1979-01-01), Hebeda et al.

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