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 an initial acid-catalyzed hydrolysis to thin, or liq

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 an initial acid-catalyzed hydrolysis to thin, or liquefy, the starch, 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 partial starch hydrolysate with the water solubles being recycled to the system. Thereafter, the partial starch hydrolysate is subjected to further hydrolysis in the presence of an acidic cationic exchange resin as catalyst to provide an aqueous solution of fermentable sugar.

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) liquefying an aqueous slurry of the starch in the presence of an acid hydrolysis ca

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) liquefying an aqueous slurry of the starch in the presence of an acid hydrolysis catalyst to provide sterile aqueous partial starch hydrolysate slurry containing the water insoluble protein and oil in substantially unaltered condition; (b) separating the slurry resulting from liquefying step (a) into an aqueous sterile slurry of partial starch hydrolysate and an aqueous slurry of water insoluble protein and oil; and, (c) saccharifying the relatively thin aqueous slurry of partial starch hydrolysate in the presence of an acidic cationic exchange resin to provide a sterile fermentable sugar.