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Method for preparing hydroxypropul starch under ultrasound and microwave synergistic effect

A hydroxypropyl starch and synergistic technology, applied in the field of food processing, can solve the problems of inhomogeneity, low molecular substitution degree of hydroxypropyl starch, low reaction efficiency, etc., and achieve short reaction time, uniform and stable product quality, and reaction efficiency. high effect

Inactive Publication Date: 2010-06-23
ZHEJIANG GLOBALVILLAGE TECH INNOVATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problems of low reaction efficiency, low degree of molecular substitution and inhomogeneity of the obtained hydroxypropyl starch in various processing methods of hydroxypropyl starch, and provide useful reference for the deep processing of starch and the application of ultrasound and microwave

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] The corn starch is mixed into starch milk with a concentration of 40% according to the mass ratio, and placed in an ultrasonic ultrasonic reactor with an ultrasonic power of 200W and a frequency of 20kHz. The ultrasonic is applied for 10 minutes, then taken out, filtered and dried, and then combined with 0.32 % Sodium hydroxide, 2.8% anhydrous sodium sulfate, 3.4% propylene oxide were mixed, fully stirred, mixed uniformly, and finally placed in a microwave reactor for reaction, the microwave power was 100W, and the action time was 2min. After the reaction is completed, take out and neutralize to pH 5.5-6.0 with 1 mol / L HCL, and dry to obtain hydroxypropyl starch with a molecular substitution degree of 0.03.

example 2

[0013] The wheat starch raw materials are prepared into starch milk with a concentration of 45% according to the mass ratio, and placed in an ultrasonic ultrasonic reactor with an ultrasonic power of 250W and a frequency of 40kHz. The ultrasonic is used for 30 minutes, then taken out, filtered and dried, and then combined with 0.35% sodium hydroxide, 3.0% anhydrous sodium sulfate and 3.8% propylene oxide were mixed, fully stirred and mixed uniformly, and finally placed in a microwave reactor for reaction. The microwave power was 150W and the action time was 3min. After the reaction is completed, take out and neutralize to pH 5.5-6.0 with 1 mol / L HCL, and dry to obtain hydroxypropyl starch with a molecular substitution degree of 0.09.

example 3

[0015] The potato starch raw materials were prepared into starch milk with a concentration of 42% according to the mass ratio, and placed in an ultrasonic ultrasonic reactor with an ultrasonic power of 300W and a frequency of 20kHz. The ultrasonic action was performed for 40 minutes, and then taken out, filtered and dried, and then combined with 0.38% sodium hydroxide, 3.0% anhydrous sodium sulfate and 3.9% propylene oxide were mixed, fully stirred and mixed uniformly, and finally placed in a microwave reactor for reaction. The microwave power was 200W and the action time was 2min. After the reaction is completed, take out and neutralize to pH 5.5-6.0 with 1 mol / L HCL, and dry to obtain hydroxypropyl starch with a molecular substitution degree of 1.50.

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Abstract

The invention relates to a method for preparing hydroxypropul starch under ultrasound and microwave synergistic effect, belonging to the grain processing field; cereal grains or yam starch are used as raw material, epoxypropane is taken as etherifying agent, sodium hydroxide is taken as catalyst, and anhydrous sodium sulfate is used as swelling restraining agent, and the hydroxypropul starch is prepared under the ultrasound and microwave synergistic effect; the starch raw material is prepared into starch milk with 10-50 percent of concentration by mass ratio, and then the starch milk is placed in an ultrasonic wave reactor with 200W-800W of supersonic wave electric power and 20kHz-500kHz of frequency, ultrasound action is carried out for 10-60min, and then the starch milk is taken out, filtered and dried, and then the starch milk is mixed with 0.2-0.4 percent of sodium hydroxide, 1.0-3.0 percent of the anhydrous sodium sulfate and 2.0-7.2 percent of epoxypropane, the mixture is fully stirred and mixed uniformly, and then the mixture is placed in a microwave reactor for reaction, the microwave power is 60-300W, and the microwave action time is 2-20min; after the reaction is carriedout, the reaction product is taken out and is neutralized by HCL with 1mol / L until the pH value is 5.5-6.0, and then the drying is carried out, so as to obtain the hydroxypropul starch with 0.01-2.00of molecule substitution degree; in the method, the reaction time is short, the efficiency is high, the product quality is good, the molecule substitution degree can be adjusted in a large range, andthe application range is wide.

Description

Technical field [0001] The invention belongs to the field of food processing. In particular, it relates to a method for preparing hydroxypropyl starch through the synergistic action of ultrasound and microwave. Background technique [0002] Hydroxypropyl starch is an important chemically modified starch. After its modification, due to the high stability of the etherified starch replacing the ether bond, the hydroxypropyl starch is hydrophilic, which can weaken the internal hydrogen bond strength of the starch granule structure. It is easy to swell, easy to gelatinize, transparent paste liquid, good fluidity, weak settling and high stability. Hydroxypropyl corn starch can be used in food, printing, textile, printing and dyeing, detergent, papermaking, medicine, metallurgy, oil drilling and other industries. In the food industry, it can be used as a thickener, suspending agent and paint, etc. As a thickener, it is especially suitable for frozen foods and convenience foods, so tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/12
Inventor 胡爱军吴聪郑捷秦志平
Owner ZHEJIANG GLOBALVILLAGE TECH INNOVATION CO LTD
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