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Microwave induced method for catalytic preparation of starch hydrolyzed sugar

A technology of starch hydrolysis sugar and induced catalysis, which is applied in the production of sugar, sugar production, glucose production, etc., can solve the problems of operators' health and production environment, high requirements for equipment corrosion resistance, and very large impact. Achieve the effects of shortened hydrolysis time, low pressure resistance requirements and high hydrolysis rate

Inactive Publication Date: 2008-10-22
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that hydrochloric acid is used as catalyst, which requires high corrosion resistance of equipment. In addition, hydrochloric acid is volatile, which has an impact on the health of operators and the production environment. The concentration of starch milk is low (16-25%). The quality of the product is poor, and the acidity of the system after the hydrolysis is high, which needs to be neutralized by alkali. The salt ions in the system have a great influence on the subsequent production, such as the refining of glucose and microbial fermentation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Integrated microwave-induced catalysis for the preparation of starch hydrolyzed sugars:

[0013] 1. Preparation of starch milk: Take 100 grams of starch raw material, crush it to 150 mesh, add water in a special microwave vessel to make a 30% starch aqueous solution, and add about 0.15% of CaCl at the same time 2 , stirred evenly, and made into starch milk;

[0014] 2. Microwave-induced catalysis: Add 15,000 U of α-amylase and 10,000 U of glucoamylase to the vessel containing the prepared starch milk. After stirring evenly, place it in a microwave oven. The microwave radiation power is 800W, and the microwave radiation temperature is controlled at 65 At about ℃, the microwave-induced catalytic hydrolysis time is 2-4 minutes;

[0015] 3. Enzyme inactivation treatment: heat the obtained hydrolyzate rapidly to above 100°C in a microwave field and keep it for 1 min to inactivate the activity of α-amylase and glucoamylase, and the starch hydrolysis sugar obtained is used as...

Embodiment 2

[0017] Staged microwave-induced catalysis for the preparation of starch hydrolyzed sugars:

[0018] 1. Preparation of starch milk: Take 100 grams of starch raw material, crush it to 150 mesh, add water in a special microwave vessel to make a 30% starch aqueous solution, and add about 0.15% of CaCl at the same time 2 , stirred evenly, and made into starch milk;

[0019] 2. Microwave-induced catalytic liquefaction: Add 15,000 U of α-amylase to the container containing the prepared starch milk, stir well, put it in a microwave oven, microwave radiation power is 800W, and the microwave radiation temperature is controlled between 60-80°C , microwave-induced catalytic hydrolysis for 2-4 minutes; then carry out enzyme-inactivating treatment, rapidly raise the temperature of the obtained liquefied liquid to 145-150°C in the microwave field, and keep it for 1 minute to inactivate the α-amylase activity;

[0020] 3. Microwave-induced catalytic saccharification: adjust the pH value of t...

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Abstract

The invention discloses a making method of hydrolytic sugar of starch catalyzed and induced by microwave, which comprises the following steps: adopting rough starch as raw material; grinding to 100-150 order; adding water to allocate 15-40% starch liquid; adding 0.05-0.15% CaCl2; stirring evenly; allocating starch emulsion; adding 80-150U / g alpha-amylase and 80-100U / g glucose amylase; stirring evenly; irradiating through microwave; controlling the irradiating temperature at 50-80 deg. c; maintaining the inducing and catalytic time for 1-30min; heating the hydrolytic liquid over 90-150 deg. c for 0.5-1 min; killing the activity of alpha-amylase and glucose amylase; obtaining the product.

Description

technical field [0001] The invention relates to a preparation method of starch hydrolysis sugar. Background technique [0002] Traditional starch hydrolysis methods include acid hydrolysis, enzyme hydrolysis, and acid enzyme hydrolysis, among which acid hydrolysis and enzyme hydrolysis are commonly used methods in industry. Acid hydrolysis requires a very low pH value and is carried out under high temperature and high pressure conditions, so the requirements for equipment corrosion resistance, high temperature and high pressure resistance are relatively high, and the hydrolysis time is very long. The concentration of starch milk is 16-25%. The resulting product is of poor quality; enzymatic hydrolysis is a method used more in current production, but due to the long time (24-48 hours) required for enzymatic hydrolysis, the starch milk concentration is 16-25%, and the required temperature is also higher 90-145°C, so the required energy consumption is high, which also seriousl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C13K1/06
Inventor 张小云田学达陈华荣陈竹权小芳
Owner XIANGTAN UNIV
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