Oxidation of starch
AssigneeCooperatieve Verkoop-en Productievereniging van Aardappelmeel en Derivaten AVEBE B.A.
InventorsRonald Peter W. Kesselmans, Berend Cornelis A. ter Veer, Pieter Hubert Brouwer, Thomas Albert Wielema
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Abstract
The invention relates to a process for the oxidation of starch, wherein a root or tuber starch comprising at least 95 wt. % of amylopectin, based on dry substance of the starch, is treated with an oxidizing agent and the resulting product is subjected to an alkaline treatment, said treatment comprising keeping the product for at least 15 minutes at a temperature of 20-50° C. and a pH higher than 10. The invention further relates to an oxidized starch obtainable by said process and to various applications of said oxidized starch.
Claims7
A process for the oxidation of a starch, comprising
- i. treating a root or tuber starch comprising at least 95 wt. % of amylopectin, based on dry substance of the starch, with an alkali metal hypochlorite, at a pH between 6.5 and 8.5 to form an oxidized starch product, and
- ii. after oxidation is complete, subjecting the oxidized starch product to an alkaline treatment, wherein the alkaline treatment comprises keeping the oxidized starch product at a temperature of 20-50° C. and a pH higher than 10, for at least 15 minutes.
A process for the oxidation of a starch, comprising
- i. treating a root or tuber starch comprising at least 95 wt. % of amylopectin, based on dry substance of the starch, with an alkali metal hypochlorite, at a pH between 6.5 and 8.5 to form an oxidized starch product, wherein the alkali metal hypochlorite is in an amount between 0.001 and 0.4 moles per mole of starch;
- and
- ii. after oxidation is complete, subjecting the oxidized starch product to an alkaline treatment, wherein the alkaline treatment comprises keeping the oxidized starch product at a temperature of 20-50° C. and a pH higher than 10, for at least 15 minutes.
Dependencies are inferred from the claim text.