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Method for preparing starch octenyl succinate under supercritical conditions

An octenyl succinic acid, supercritical technology, applied in food preparation, food science, application, etc., can solve the problems of low reaction efficiency and high impurity content, and achieve uniform reaction, high-efficiency synthesis, and fast penetration

Inactive Publication Date: 2014-04-16
LIUZHOU BOZE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 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

[0020] 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, the supercritical temperature is 45°C, the supercritical pressure is 16MPa, and the starch oxidation and esterification modification reactions are carried out simultaneously under the condition of stirring. The reaction time is 2 hours, and the reaction is completed. 2 Flow rate is 15 L / h supercritical extraction purification product, obtains powdered starch octenyl succinate product.

[0021] The product obtained in this example has a degree of substitution of 0.034 and a viscosity of 10-14 mPa·s (6%, 95°C).

Embodiment 2

[0023] 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, starch oxidation and esterification modification reactions are carried out simultaneously under stirring. The reaction time is 4 hours. After the reaction is complete, at a supercritical temperature of 45°C and a pressure of 26MPa, 2 The flow rate is 20 L / h supercritical extraction and purification product to obtain powdered starch octenyl succinate product.

[0024] The product obtained in this example has a degree of substitution of 0.073 and a viscosity of 16-20 mPa·s (6%, 95°C).

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Abstract

The invention discloses a method for preparing starch octenyl succinate under supercritical conditions, which is characterized by comprising the following steps by using starch as a raw material, oxydol or sodium hypochlorite as an oxidizer and octenyl succinic anhydride as an esterifying agent: A. respectively adding the starch, oxidizer and esterifying agent into a supercritical reaction kettle, adding CO2 with a high-pressure pump, heating to the supercritical temperature of 40-60 DEG C, and reacting under the supercritical pressure of 8.0-25 Mpa for 1-6 hours; B. under the supercritical reaction conditions, carrying out oxidization-esterification one-step synthesis reaction while stirring; and C. after the oxidization-esterification one-step synthesis reaction, carrying out supercritical extraction on the reaction product to obtain the powdery starch octenyl succinate.

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 under supercritical conditions. 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. E.g: [0004] 1. Patent document CN1431285 has introduced a kind of production method of octeny...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04C08B31/18A23L1/09A23L29/30
CPCY02P20/54
Inventor 黄景明林国友罗永城梁剑卢兰
Owner LIUZHOU BOZE SCI & TECH
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