Method of preparing a heat-modified starch
AssigneeRoquette Freres
InventorsSolène Bock, Vincent Wiatz, Claude Quettier
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Abstract
The invention relates to a method of producing a heat-modified starch comprising the steps of: (i) preparing a starch milk containing between 30 and 40% by weight, preferably between 35 and 37% by weight, solid matter, (ii) adding a powdery alkaline agent such as to obtain a final conductivity of between 0.7 and 2.5 mS/cm, (iii) ensuring a contact time of between 0.5 and 5 hours, (iv) filtering and drying the starch milk, (v) and heating the dried starch to bring it to a temperature of more than 180° C. for a dwell time of between 8 and 50 minutes, preferably between 10 and 40 minutes, even more preferably between 12 and 35 minutes.
Claims14
A process for producing a heat-modified starch resistant to shear, to acidity and to heat treatments, being said process without use of an aqueous-alcoholic solvent and comprising the steps of:
- (i) preparing a starch milk with a solids content of between 30% and 40% by weight,
- (ii) Adding a powdered alkaline agent to the starch milk to reach a pH between 10.2 and 10.8,
- (iii) ensuring a contact time of starch milk and alkaline agent of between 0.5 and 5 hours,
- (iv) filtering and drying the starch milk subsequently to step (iii) to an equilibrium moisture of the starch of between 10-14% by weight, and
- (v) heating said dried starch so as to bring it to a temperature above 180° C. for a residence time of between 8 and 50 minutes;
- wherein the powdered alkaline agent is added in step (ii) so as to obtain a final conductivity of between 0.7 and 2.5 mS/cm, the final conductivity being measured after drying the starch milk in step (iv) and resuspending the starch to a solids content of 20% by weight.
Dependencies are inferred from the claim text.