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US 11,697,745 B2Granted
Partially soluble dextrins of high molecular weight
AssigneeRoquette Freres
InventorsJulien Mesnager, Vincent Wiatz
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Abstract
The subject matter of the invention is a modified starch, characterized in that it exhibits: ⋅a weight-average molecular weight ranging from 250 000 to 2 000 000 Da; ⋅a solubility, measured according to a test A, ranging from 50 to 85%. The invention also relates to a process for the manufacture of said starch and to the use thereof in the manufacture of an aqueous binder.
Claims25
A dextrin exhibiting:
- a weight-average molecular weight ranging from 250,000 to 2,000,000 Da;
- a solubility, measured according to a test A, ranging from 50 to 85% and wherein the dextrin is obtained by a process which comprises:
- a step of introducing at least one granular starch into a cylindrical linear turboreactor;
- a step of introducing, into said turboreactor, at least one acidic agent chosen from strong acids;
- a step of modifying the starch in said turboreactor;
- a step of recovering the starch modified during the preceding step;
- in which at least part of the modifying reaction step is carried out with:
- a moisture content of the starch of between 1 and 3%;
- an amount of acid introduced of between 0.003 and 0.020 mol of acid per kg of dry starch;
- and a temperature of the turboreactor of between 160 and 215° C.
7 more elements
A process for modifying starch, which comprises:
- a step of introducing at least one granular starch into a cylindrical linear turboreactor;
- a step of introducing, into said turboreactor, at least one acidic agent chosen from strong acids;
- a step of modifying the starch in said turboreactor;
- a step of recovering the starch modified during the preceding step;
- in which at least part of the modifying reaction step is carried out with:
- a moisture content of the starch of between 1 and 3%;
- an amount of acid introduced of between 0.003 and 0.020 mol of acid per kg of dry starch;
- and a temperature of the turboreactor of between 160 and 215° C., preferably between 170 and 210° C.
5 more elements
Dependencies are inferred from the claim text.