초록 ▼

Starch derived from a dry milled cereal grain such as corn or milo is hydrolyzed to provide a sterile aqueous fermentable sugar solution which is especially adapted for fermentative conversion to ethanol with minimum thermal expenditure. Following a preliminary acid-catalyzed hydrolysis of the starc

Starch derived from a dry milled cereal grain such as corn or milo is hydrolyzed to provide a sterile aqueous fermentable sugar solution which is especially adapted for fermentative conversion to ethanol with minimum thermal expenditure. Following a preliminary acid-catalyzed hydrolysis of the starch to provide a sterile hydrolysate slurry, the slurry is further hydrolyzed in the presence of added aqueous non-fermentable carbohydrate to reequilibrate the hydrolysis reaction in favor of increased production of fermentable sugar, primarily glucose. Substantially all of the water insoluble protein and oil components, and a portion of the water soluble components, e.g., sugars, proteins and vitamins, are separately recovered from the sterile hydrolysate either before or after the further hydrolysis step with the water solubles being recycled to the system to effect reequilibration of a further quantity of hydrolysate.

대표청구항 ▼

A process for converting the starch fraction derived from whole dry milled cereal grain to a sterile aqueous solution of fermentable sugar, said starch containing water insoluble protein and oil, which comprises: (a) hydrolyzing in a preliminary hydrolysis step an aqueous slurry of the starch in the

A process for converting the starch fraction derived from whole dry milled cereal grain to a sterile aqueous solution of fermentable sugar, said starch containing water insoluble protein and oil, which comprises: (a) hydrolyzing in a preliminary hydrolysis step an aqueous slurry of the starch in the presence of an acid hydrolysis catalyst at an elevated pressure and temperature to provide a starch hydrolysate slurry containing water insoluble protein and oil and water soluble components; (b) separating water insoluble protein and oil with or without water soluble components from the hydrolysate resulting from step (a); and, (c) hydrolyzing in a further hydrolysis step the aqueous sterile starch hydrolysate slurry resulting from step (a) in the presence of added aqueous water soluble non-fermentable carbohydrate to provide a sterile aqueous solution of fermentable sugar.