Method for liquefying starch
AssigneeGenencor International, Inc.
InventorsColin Mitchinson, Leif P. Solheim
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Abstract
According to the invention a method is provided for liquefying starch comprising the steps of adding a sodium composition to the starch prior to or simultaneously with liquefying the starch; adding α-amylase to the treated starch; and reacting the treated starch for a time and at a temperature effective to liquefy the treated starch. Preferred sodium compositions comprise sodium chloride, sodium bicarbonate, sodium benzoate, sodium sulfate, sodium bisulfite, sodium ascorbate, sodium acetate, sodium nitrate, sodium tartrate, sodium tetraborate, sodium propionate, sodium citrate, sodium succinate, monosodium glutamate, trisodium citrate, sodium phosphate or a mixture thereof.
Claims14
A method for liquefying a starch solution comprising the steps of:
- (a) adding a sodium composition to said starch solution, wherein a final sodium concentration of said starch solution is greater than 20 ppm;
- (b) adding α-amylase to said starch solution;
- and
- (c) incubating said starch solution comprising said sodium composition and said α-amylase for a time and under conditions suitable to liquefy said starch solution to form a liquefied starch solution;
- whereby said step (c) is carried out under conditions such that an antioxidant is present in said starch solution in a final concentration comprising less than 2.5 mM of an anti-oxidant.
A method for liquefying a starch slurry comprising the steps of:
- (a) adding a sodium composition to a starch slurry wherein the final sodium composition is present in a final concentration of the starch slurry from about 20 ppm to about 1000 ppm;
- (b) adding α-amylase to the starch slurry;
- and
- (c) incubating the starch slurry with the sodium composition and the α-amylase for a time and under conditions suitable to liquefy the starch to form a liquefied starch solution;
- whereby said step (c) is carried out under conditions such that an anti-oxidant is present in the starch slurry in a concentration less than 2.5 mM.
Dependencies are inferred from the claim text.