A method in which starch is hydrolysed by adding it to an acidified medium, containing from about 1 to about 5 percent by weight of mineral acid based on the weight of starch to be hydrolysed, at a temperature above about 80.degree. C. and over a period of from about 5 to about 30 minutes, and allowing the starch to hydrolyse for a period of from about 10 to about 90 minutes thereby to produce a dextrine solution suitable for use in adhesives.
There is described a method for the hydrolysis of starch to produce saccharified mash by hydrolyzing and solubilizing amylaceous raw materials above the gelatinization temperature of the starch at atmospheric pressure. The resulting mixtures are saccharified upon cooling by the addition of a saccharifying enzyme. In order to avoid a pre-treatment and purification of the comminuted raw materials as well as long heating and retention periods, thus having a low energy demand despite a complete hydrolysis of starch, comminuted and otherwise untreated grains are stirred into an aqueous take-up liquor being in a hydrolyzing vessel and maintained at a temperature of from 85.degree. to 100.degree. C. Acid is added prior to stirring in or a solubilizing enzyme is added during stirring in. The hydrolyzed mixture obtained is cooled to 60.degree. to 65.degree. C. without retention time in the hydrolyzing vessel and is conducted to the saccharification step.
