Bleached dextrin and methods of forming same
View Patent ↗A method of forming a bleached dextrin, comprising combining a dextrin-based composition selected from the group consisting of starch dextrin, cyclodextrins, inulin, hydrogenated indigestible dextrins, hydrogenated starch hydrolysates, highly branched maltodextrins, and combinations of any thereof with a caustic agent and an oxidant to form a mixture; heating the mixture for a period of time; and drying the mixture to form the bleached dextrin.
1. A method of forming a bleached dextrin, comprising:
combining a dextrin-based composition selected from the group consisting of starch dextrin, cyclodextrins, inulin, hydrogenated indigestible dextrins, hydrogenated starch hydrolysates, highly branched maltodextrins, and combinations of any thereof with a caustic agent and an oxidant to form a mixture;
heating the mixture for a period of time; and
drying the mixture to form the bleached dextrin.
2. The method of claim 1 , wherein the dextrin-based composition is selected from the group consisting of a paste, a slurry and a combination thereof
3. The method of claim 2 , wherein the paste comprises water.
4. The method of claim 1 , wherein the caustic agent is added to the dextrin-based composition in an amount ranging from 0.01% to 10% on dextrin dry basis.
5. The method of claim 1 , wherein the caustic agent is combined at a pH ranging from 1 to 10.
6. The method of claim 1 , wherein the oxidant is added to the dextrin-based composition in an amount ranging from 0.1% to 10%.
7. The method of claim 1 , wherein the oxidant at a concentration of 0.1 to 70% is added to the dextrin-based composition in an amount ranging from 3 to 15%.
8. The method of claim 1 , wherein the mixture has a pH ranging from 6 to 10.
9. The method of claim 1 , wherein the mixture is heated to a temperature ranging from 10 to 80° C. for a period of time ranging from 10 to 360 minutes.
10. The method of claim 1 , wherein the drying occurs at a temperature ranging from 40 to 500° C. for a period of time ranging from 1 to 120 minutes.
11. The method of claim 1 , further comprising grinding the mixture.
12. The method of claim 1 , wherein the bleached dextrin has a whiteness level ranging from 90 to 100% based on CIE Lab model.
13. A method of forming a bleached dextrin, comprising:
forming a dextrin-based slurry;
combining the dextrin-based slurry with a caustic agent, thus producing a first mixture;
combining the first mixture with an oxidant, thus producing a second mixture;
drying the second mixture to form the bleached dextrin; and
grinding the bleached dextrin.
14. The method of claim 13 , further comprising adding an enzyme to the second mixture to remove excess of the oxidant before drying.
15. The method of claim 13 , wherein the dextrin of the dextrin-based slurry is digestion resistant and soluble.
16. A method of forming a bleached dextrin, the method comprising:
hydrating 0.3 to 3 parts powdered dextrin with 1 to 5 parts water by weight to form a dextrin-based composition;
combining the dextrin-based composition with sodium hydroxide to form a first mixture with a pH of 6 to 10;
combining hydrogen peroxide with the first mixture to form a second mixture;
incubating the second mixture between 20° C. and 50° C. for 0 to 2 hours; and
drying the second mixture to form the bleached dextrin.
17. The method of claim 16 , wherein the hydrogen peroxide is added to the first mixture for 10 to 20 minutes.
18. The method of claim 17 , wherein the hydrogen peroxide is added to the first mixture under a controlled pH with sodium hydroxide.
19. The method of claim 18 , wherein the pH is controlled for 30 to 45 minutes to complete the reaction.
20. The method of claim 16 , further comprising grinding the bleached dextrin.