Method for preparing low-density digestion-resistant starch

A technology of anti-digestion starch and low density, applied in the field of starch processing, can solve the problems of high density and low purity of anti-digestion starch, and achieve the effect of simple operation, large-scale industrial production and application value, and improvement of content and purity.

Pending Publication Date: 2022-04-12
BAOLINGBAO BIOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of low purity and high density in the anti-digestible starch prepared in the prior a

Method used

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  • Method for preparing low-density digestion-resistant starch

Examples

Experimental program
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Effect test

Embodiment 1

[0029] (1) 15g of waxy cornstarch is mixed with 100ml of water to prepare 15% (g / ml) starch milk, and NaOH is added dropwise to adjust the pH value of the starch milk to 11;

[0030] (2) Add 0.75g of propylene oxide and react at 40°C for 22h;

[0031] (3) the phosphorus oxychloride that adds 0.009g again after reaction finishes and continues reaction;

[0032] (4) After the reaction, the pH value of the solution was adjusted to 4.5, and 100 U / g of glucoamylase was added to react for 30 minutes at 60° C., and the enzyme was killed in a boiling water bath to obtain a content of resistant starch of 58%;

[0033] (5) The above-mentioned feed liquid is passed through a 200 Da nanofiltration membrane, until the glucose content in the active ingredient of the concentrated solution is 3.5%, and the content of resistant starch is 94%;

[0034] (6) Get the above-mentioned concentrated solution and carry out valve-array continuous ion exchange to remove cations and anions, and the condu...

Embodiment 2

[0037] (1) 200 g of waxy cornstarch is mixed with 800 ml of water to prepare 25% (g / ml) starch milk, and NaOH is added dropwise to adjust the pH value of the starch milk to 11.8;

[0038] (2) Add 18g of propylene oxide and react at 43°C for 24h;

[0039] (3) The phosphorus oxychloride that adds 0.016g again after reaction finishes and continues reaction;

[0040] (4) After the reaction, the pH value of the solution was adjusted to 4.5, and 100 U / g of glucoamylase was added to react at 60° C. for 30 minutes, and the enzyme was killed in a boiling water bath to obtain a content of 63% resistant starch;

[0041] (8) passing the above feed liquid through a nanofiltration membrane with a molecular weight of 200 Da until the glucose content in the concentrated solution is less than 1.5%, and the purity is 97%;

[0042] (5) Take the above-mentioned concentrated solution and carry out valve-array continuous ion exchange to remove cations and anions, and the conductivity of the feed l...

Embodiment 3

[0045] (1) Mix 600 g of waxy cornstarch with 2000 ml of water to prepare 30% (g / ml) starch milk, and add dropwise NaOH to adjust the pH of the starch milk to 12;

[0046] (2) Add 60g of propylene oxide and react at 40°C for 22h;

[0047] (3) The phosphorus oxychloride that adds 0.6g again after reaction finishes and continues reaction;

[0048] (4) After the reaction, the pH value of the solution was adjusted to 4.5, and 100 U / g of glucoamylase was added to react for 30 minutes at 60° C., and the enzyme was quenched in a boiling water bath to obtain a digestible starch content of 62%;

[0049] (5) Pass the above-mentioned feed liquid through a 200 Da nanofiltration membrane until the glucose content in the concentrated solution is 4%, and the purity is 93%;

[0050] (6) Get above-mentioned concentrated solution and carry out valve array type continuous ion exchange, remove cation and anion, the conductivity of feed liquid is 11 μ s / cm;

[0051] (7) Add 92g sodium bicarbonate...

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Abstract

The invention relates to a method for preparing low-density digestion-resistant starch, and belongs to the technical field of starch processing. The preparation method comprises the following steps: obtaining anti-digestion starch by adopting a chemical modification method, further improving the content of the anti-digestion starch through saccharifying enzyme hydrolysis, further refining the anti-digestion starch through membrane filtration, ion exchange and the like, and finally adding sodium bicarbonate or sodium carbonate and performing spray drying to obtain the low-density anti-digestion starch. The invention provides the preparation method of the high-purity and high-yield low-density anti-digestion starch, the method is simple to operate, the content and purity of the anti-digestion starch can be further improved at the same time, and the method has the advantages of high solubility, difficulty in caking, convenience in transportation and the like, and has relatively high industrial production and application values.

Description

technical field [0001] The invention belongs to the technical field of starch processing, and in particular relates to a method for preparing low-density anti-digestion starch. Background technique [0002] With the improvement of people's living standards, food nutrition and health issues have attracted much attention. In order to reduce the incidence of diabetes, obesity and high blood pressure, people began to prefer low-calorie, high-nutrition health food and functional food. Foods rich in resistant starch have various physiological functions such as weight control, lowering blood sugar and blood lipids, and regulating intestinal flora, and have become an emerging field of international food research in recent years. In addition, resistant starch plays a health-promoting role mainly in the human colon by fermenting microorganisms to produce short-chain fatty acids and gases, and does not have the disadvantages of rough texture and bad smell that traditional dietary fiber...

Claims

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Application Information

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IPC IPC(8): C12P19/04C12P19/14
Inventor 李克文栾庆民高蕾蕾孔刘娟张莉袁世英刘开昌高义国李新华
Owner BAOLINGBAO BIOLOGY
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