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US 6,617,447 B2Granted
Continuous oxidized starch process
AssigneeArcher Daniels Midland Company
InventorsTanja Gnad, James McClain
Life of this patent
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Abstract
The present invention relates to a method of starch production using continuous oxidation. This method allows for the starting material to contain variable amounts of non-starch products, which is common in large-scale processes. This method produces consistently oxidized starch products that exhibit a reduced tendency to form amylose crystals. Using this continuous reactor with multiple stages, it is possible to produce oxidized starch at any given viscosity.
Claims10
A method of producing oxidized starch on a continuous basis comprising
- a.) feeding a slurry of starch granules into a reactor having enough capacity to hold at least 1 hour of slurry feed on a continuous basis;
- b.) adding an oxidation reagent containing an elevated concentration of caustic to the reactor of Step a);
- c.) agitating resultant of Step b.);
- d.) withdrawing reacted starch slurry from the reactor of Step c.) at the same rate as the said starch slurry is added;
- e.) feeding a portion of said withdrawn starch slurry from Step d.) into a second reactor having enough capacity to hold at least 1 hour of said withdrawn starch slurry feed on a continuous basis;
- f.) adding an oxidation reagent to said second reactor of Step e.);
- g.) agitating said second reactor of Step f.);
- h.) withdrawing reacted starch slurry from said second reactor of Step g.) at the same rate as the said starch slurry is added;
- and
- i.) repeating Steps e.), f.), g.) and h.) until the oxidized starch is of desired viscosity.
7 more elements
A method of producing oxidized starch on a continuous basis comprising
- a.) mixing a slurry of starch granules with an oxidation reagent containing an elevated concentration of caustic;
- b.) feeding the resultant of Step a.) into a reactor having enough capacity to hold at least 1 hour of slurry feed on a continuous basis;
- c.) agitating said reactor of Step b.);
- d.) withdrawing reacted starch slurry from said reactor of Step c.) at the same rate as the said starch slurry is added;
- e.) feeding a portion of said withdrawn starch slurry from Step d.) into a second reactor having enough capacity to hold at least 1 hour of said withdrawn starch slurry feed on a continuous basis:
- f.) adding to said second reactor of Step e.) an oxidation reagent;
- g.) agitating said second reactor of Step f.);
- h.) withdrawing reacted starch slurry from said second reactor of Step g.) at the same rate as the said starch slurry is added to the second reactor
- i.) repeating Steps e.), f.), g.), and h.) until the oxidized starch is of desired viscosity.
6 more elements
Dependencies are inferred from the claim text.