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Method for preparing octenyl succinate starch ester

A technology of octenyl succinic acid and octenyl succinic anhydride, which is applied in the field of food additive preparation, can solve the problems of low reaction efficiency and high impurity content, and achieves the effects of uniform reaction, efficient synthesis and high esterification reaction efficiency

Inactive Publication Date: 2014-04-23
LIUZHOU BOZE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of this invention is to provide a kind of method for preparing starch octenyl succinate, to overcome the high impurity content of above-mentioned preparation method, the shortcoming that reaction efficiency is low

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0019] A new method for preparing starch octenyl succinate under supercritical conditions. Its process route is: add 100 grams of cornstarch, 2.5 grams of oxidizing agent, 5 grams of esterifying agent, 2.0 grams of sodium hydroxide, 25 grams of water in the supercritical reactor, with supercritical CO 2 As the reaction medium, at a supercritical temperature of 45°C and a supercritical pressure of 16MPa, the starch oxidation and esterification modification reactions are carried out simultaneously under stirring. The reaction time is 2 hours. After the reaction, the temperature is kept at 30°C. ℃, pressure 22MPa, CO 2 Flow rate is 15 L / h supercritical extraction purification product, obtains powdered starch octenyl succinate product.

[0020] The product obtained in this example has a degree of substitution of 0.021 and a viscosity of 10-12 mPa·s (6%, 92°C).

Embodiment 2

[0022] A new method for preparing starch octenyl succinate under supercritical conditions. The process route is: add 100 grams of tapioca starch, 1.5 grams of oxidizing agent, 10 grams of esterifying agent, and 30 grams of water in a supercritical reactor, and use supercritical CO 2 As the reaction medium, at a supercritical temperature of 60°C and a supercritical pressure of 12MPa, the temperature is kept at 30°C, and the starch oxidation and esterification modification reactions are carried out simultaneously under stirring. The reaction time is 4 hours. ℃, pressure 26MPa, CO 2 The flow rate is 20 L / h supercritical extraction and purification product to obtain powdered starch octenyl succinate product.

[0023] The product obtained in this example has a degree of substitution of 0.061 and a viscosity of 16-21 mPa·s (6%, 93°C).

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Abstract

The invention discloses a method for preparing octenyl succinate starch ester. The method is characterized in that the octenyl succinate starch ester is prepared by using starch as a raw material, using hydrogen peroxide or sodium hypochlorite as oxidant and using octenyl succinic anhydride as esterifying agent according to the following reaction process: A. respectively adding the starch, the oxidant and the esterifying agent into a supercritical reaction kettle, adding CO2 by using a high-pressure pump, and then, heating up to a supercritical temperature of 40-60 DEG C, wherein the supercritical pressure is 8.0-25 Mpa and the reaction time is 1-6 hours; B. carrying out an oxidation and esterification one-step synthesis reaction under the supercritical reaction conditions and a stirring condition; and C. after the oxidation and esterification one-step synthesis reaction, supercritical extracting the reactants to obtain powdery octenyl succinate starch ester.

Description

technical field [0001] The invention belongs to the technical field of food additive preparation, in particular to a method for preparing starch octenyl succinate. Background technique [0002] Octenyl starch succinate (OSAS) is an environmentally friendly, green and safe modified starch that can be widely used in food, medicine, cosmetics, biological products and other fields. At present, there are multiple methods for producing octenyl starch succinate (OSAS) at home and abroad, mainly using the wet process based on the aqueous phase method, and some solvent and dry processes using organic solvents. At present, OSAS is mainly prepared by wet process with water as the medium at home and abroad. [0003] In terms of making octenyl starch succinate (OSAS), we retrieved the following publications, but there are some corresponding limitations in use. For example: [0004] 1. Patent document CN1431285 has introduced a kind of production method of octenyl succinic acid starch ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04C08B31/18
CPCY02P20/54
Inventor 黄景明罗永城梁剑
Owner LIUZHOU BOZE SCI & TECH
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