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Preparation method of starch sodium octenyl succinate

A technology of octenyl succinic acid and starch ester, applied in the field of preparation of modified starch, can solve the problems of long reaction time, decreased product substitution degree, high process condition control requirements, etc. The effect of reaction efficiency

Inactive Publication Date: 2021-04-06
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Starch octenyl succinate prepared by the prior art generally takes a long time to react, and requires high control of process conditions. It is difficult for octenyl succinate to penetrate into the interior of starch granules in the aqueous phase. The process of unreacted octenyl succinic anhydride will lead to partial hydrolysis of octenyl succinic acid starch ester, these reasons will reduce the degree of substitution of the product

Method used

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  • Preparation method of starch sodium octenyl succinate
  • Preparation method of starch sodium octenyl succinate
  • Preparation method of starch sodium octenyl succinate

Examples

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Effect test

Embodiment 1

[0021] (1) Starch pretreatment: using millet starch as raw material, millet starch and deionized water were prepared into 100mL 20% (w / w) starch milk solution, using ultrasonic cell breaker, ultrasonic power 250W, ultrasonic 40min, every Working for 5s and 5s apart, the starch milk solution was treated with an ice-water bath during the ultrasonic process. After pretreatment, the starch milk was dried at 40° C. for 48 hours after suction filtration, and was set aside.

[0022] (2) Synthetic of octenyl succinic acid starch ester: get the starch of certain quality step (1) pretreatment, add appropriate amount of deionized water and be mixed with the starch milk of 35% (w / w), get octenyl succinic anhydride ( The addition amount is 3% of the starch dry base) after being diluted 5 times with absolute ethanol, it is slowly added to the starch milk within 1h, stirred with a constant temperature magnetic stirrer, and the reaction temperature is controlled at 35°C, and 3 % NaOH solutio...

Embodiment 2

[0028] (1) Starch pretreatment: using millet starch as raw material, millet starch and deionized water were prepared into 100mL 20% (w / w) starch milk solution, using ultrasonic cell breaker, ultrasonic power 250W, ultrasonic 40min, every Working for 5s and 5s apart, the starch milk solution was treated with an ice-water bath during the ultrasonic process. After pretreatment, the starch milk was dried at 40° C. for 48 hours after suction filtration, and was set aside.

[0029] (2) Synthetic of octenyl succinic acid starch ester: get the starch of certain quality step (1) pretreatment, add appropriate amount of deionized water and be mixed with the starch milk of 35% (w / w), get octenyl succinic anhydride ( The addition amount is 3% of the starch dry base) diluted 5 times with absolute ethanol and slowly added to the starch milk within 0.5h, stirred with a constant temperature magnetic stirrer, controlled the reaction temperature at 30°C, and added continuously during the reactio...

Embodiment 3

[0031] (1) Starch pretreatment: using millet starch as raw material, millet starch and deionized water were prepared into 100mL 20% (w / w) starch milk solution, using ultrasonic cell breaker, ultrasonic power 250W, ultrasonic 40min, every Working for 5s and 5s apart, the starch milk solution was treated with an ice-water bath during the ultrasonic process. After pretreatment, the starch milk was dried at 40° C. for 48 hours after suction filtration, and was set aside.

[0032] (2) Synthetic of octenyl succinic acid starch ester: get the starch of certain quality step (1) pretreatment, add appropriate amount of deionized water and be mixed with the starch milk of 35% (w / w), get octenyl succinic anhydride ( The addition amount is 3% of the dry base of starch) diluted 5 times with absolute ethanol and slowly added to the starch milk within 0.5h, stirring with a constant temperature magnetic stirrer, controlling the reaction temperature to 32°C, and continuously adding during the r...

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Abstract

The invention discloses a preparation method of starch sodium octenyl succinate. The method comprises the following steps: (1) starch pretreatment: preparing starch and deionized water into a starch milk solution, carrying out ultrasonic treatment on the starch milk solution in an ice-water bath by using an ultrasonic cell disruptor, carrying out suction filtration on the pretreated starch milk, and drying for later use; and (2) synthesis of starch sodium octenyl succinate: adding deionized water into the starch treated in the step (1) to prepare starch milk, diluting octenyl succinic anhydride with absolute ethyl alcohol, slowly adding the diluted octenyl succinic anhydride into starch milk, performing esterification reaction while stirring, controlling the reaction temperature to be 30-35 DEG C and the pH value to be 8-8.5, regulating the pH value of the system to be 6-6.5 after the reaction is finished, stopping the esterification reaction, performing suction filtration and washing on reactants with ethyl alcohol, performing centrifugal washing with distilled water, drying, crushing and sieving to obtain OSA starch. The method is simple in process, mild in process condition, short in production period, high in product substitution degree and high in synthesis efficiency.

Description

technical field [0001] The invention relates to a method for preparing modified starch, in particular to a method for preparing starch octenyl succinate. Background technique [0002] Starch is a renewable carbohydrate resource in nature. It has a wide source, high yield, and has the advantages of being degradable and non-polluting. However, due to the limitations of functional properties of native starch, its application in the food industry is limited. Therefore, the research on starch The purpose of modification is to eliminate the defects of native starch and make it better used in industrial production. [0003] Starch octenyl succinate is a large class of modified starches, which are generally synthesized under aqueous conditions, using octenyl succinic anhydride and starch granules to undergo esterification under alkaline conditions. The original hydrophilic starch has hydrophobicity due to the introduction of succinic acid groups, so that the starch molecules have a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04
CPCC08B31/04
Inventor 陆兰芳王展沈汪洋贾喜午陈轩于博
Owner WUHAN POLYTECHNIC UNIVERSITY
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