Method for preparing a heat-modified starch

Patent metadata

Field	Value
Publication number	US-12325762-B2
Application number	US-202017594933-A
Country	US
Kind code	B2
Filing date	May 6, 2020
Priority date	May 7, 2019
Publication date	Jun 10, 2025
Grant date	Jun 10, 2025

Abstract

A method for producing a heat-modified starch, comprising the steps of: (i) preparing a starch milk having a solids content of between 20% and 45% by weight and adding an alkaline agent, so as to obtain a final conductivity of between 4 and 7 mS/cm (ii) filtering the starch milk so as to recover a starch cake; (iii) introducing the starch cake, continuously, into a dryer at the same time as a continuous stream of hot air in order to recover a dried powder; (iv) continuously supplying a turboreactor with the dried powder, and by setting parameters for the speed of rotation of the stirrer, so that the dried powder is continuously centrifuged and conveyed into the turboreactor; (v) recovering the heat-modified starch produced.

First claim

The invention claimed is:

1. A method for producing a heat-modified starch resistant to acid and heat treatments, wherein said process is conducted without use of an aqueous-alcoholic solvent, and comprising the steps of:
(i) preparing a starch milk with solids of between 20 and 45% by weight, preferably between 30 and 40% by weight, and adding an alkaline agent at a weight concentration of between 25 and 35%, so as to obtain a final conductivity of between 4 and 7 mS/cm;
(ii) filtering said starch milk so as to recover a starch cake having a moisture content of between 30 and 45% by weight and so that the conductivity of the filtered and resuspended starch at 20% by weight of solids is between 0.7 and 2.5 mS/cm;
(iii) introducing said starch cake continuously into a dryer together with a continuous flow of hot air having a temperature of between 130° C. and 185° C. to recover a dried powder having a moisture content of between 8% and 18% by weight;
(iv) continuously feeding the dried powder into a turboreactor, the inner wall of the turboreactor being maintained at a temperature of between 180° C. and 240° C., and by setting the rotational speed of the stirrer to achieve a centrifugal acceleration of between 850 and 2100 m·s −2 , so that said dried powder is continuously centrifuged and fed into said turboreactor for a total time of between 3 and 45 minutes;
(v) recovering the heat-modified starch thus produced.

2. The method according to claim 1 , wherein the origin of the starch is selected from the group consisting of corn, waxy corn, potato, cassava, pea, and faba bean.

3. The method according to claim 1 , wherein the alkaline agent is preferentially selected from the group consisting of sodium hydroxide, sodium carbonate, tetrasodium pyrophosphate, ammonium orthophosphate, disodium orthophosphate, trisodium phosphate, calcium carbonate, calcium hydroxide, potassium carbonate, and potassium hydroxide, taken alone or in combination, and even more preferentially sodium carbonate.

4. A heat-modified starch obtained by the method according to claim 1 .

Assignees

• Roquette Freres

Inventors

• Quettier Claude
• Wiatz Vincent
• Bock Solène
• Legrand Jacques

Classifications

• A23G9/34

  characterised by carbohydrates used, e.g. polysaccharides (characterised by the dairy products used A23G9/40) · CPC title

• A21D2/186

  Starches; Derivatives thereof · CPC title

• A23L29/212

  Starch; Modified starch; Starch derivatives, e.g. esters or ethers (containing starch hydrolysates, e.g. dextrin, A23L29/30) · CPC title

• C08L3/02

  Starch; Degradation products thereof, e.g. dextrin · CPC title

• C08B30/12 Primary

  Degraded, {destructured} or non-chemically modified starch {, e.g. mechanically, enzymatically or by irradiation; Bleaching of starch (preparation of chemical derivatives of starch C08B31/00)} · CPC title