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Method for preparing resistant dextrin from esterified starch

A technology for esterifying starch and resistant dextrin, which is applied in the field of resistant dextrin preparation, achieves the effects of high dietary fiber content, high light transmittance, and broadening the synthesis field

Active Publication Date: 2020-07-03
BAOLINGBAO BIOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, for the preparation of resistant dextrin from esterified starch, there is no relevant report

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Cornstarch and water are mixed into starch milk with a starch mass percentage of 35%, and stirred evenly;

[0036] (2) Use 2.5wt% NaOH to adjust the pH of the starch milk to 8.8-9.0, adjust the reaction temperature to 33°C, and stir for 40 minutes; add 4% acetic anhydride on a dry basis of the starch dropwise to the stirring starch milk, and mix at 60 After the dropwise addition of acetic anhydride is completed, NaOH is added dropwise to adjust the pH, and the pH of the feed solution is maintained at 8.4-8.6 during the entire reaction process; after the addition of acetic anhydride is completed, the pH reaction is continued for 30 minutes to obtain esterified starch milk;

[0037] (3) Add 2.5wt% HCl to the starch milk after esterification to neutralize the pH to 4.3-4.5, then add 35wt% hydrogen peroxide with 0.1% starch dry basis to react for 10 minutes to obtain esterified starch;

[0038] (4) Adjust the pH of esterified starch to 2.0-2.3 with 2.5wt% HCl, stir and ...

Embodiment 2

[0043] (1) Cornstarch and water are mixed to form starch milk with a starch mass percentage of 40%, and the mixture is evenly stirred;

[0044] (2) Use NaOH with a mass fraction of 3.0% to adjust the pH of the starch milk to 8.8-9.0, adjust the reaction temperature to 35°C, and stir for 40 minutes; add 8% acetic anhydride on a dry basis of starch dropwise to the stirring starch milk, and Add dropwise within 60-70min, and at the same time add dropwise NaOH to adjust the pH, and keep the pH of the feed solution during the entire reaction process at 8.4-8.6; after the dropwise addition of acetic anhydride, continue to maintain the pH for 30min to obtain esterified starch milk;

[0045] (3) Add 3.0wt% HCl to the starch milk after esterification to neutralize the pH to 4.3-4.5, then add 35wt% hydrogen peroxide with 0.1% starch dry basis to react for 10 minutes to obtain esterified starch;

[0046] (4) Adjust the pH of esterified starch to 2.0-2.3 with 3.0wt% HCl, stir and keep warm...

Embodiment 3

[0051] (1) Cornstarch and water are mixed to form starch milk with a starch mass percentage of 40%, and the mixture is evenly stirred;

[0052] (2) Use NaOH with a mass fraction of 3.5% to adjust the pH of the starch milk to 8.8-9.0, adjust the reaction temperature to 35°C, and stir for 40 minutes; add 8% acetic anhydride on a dry basis of starch dropwise to the stirring starch milk, and Add dropwise within 60-70min, and at the same time add dropwise NaOH to adjust the pH, and keep the pH of the feed solution during the entire reaction process at 8.4-8.6; after the dropwise addition of acetic anhydride, continue to maintain the pH for 30min to obtain esterified starch milk;

[0053] (3) Add 3.5wt% HCl to the starch milk after esterification to neutralize the pH to 4.3-4.5, and then add 35wt% hydrogen peroxide with 0.1% starch dry basis to react for 10 minutes to obtain esterified starch;

[0054] (4) Use 3.5wt% HCl to adjust the pH of the esterified starch to 2.0-2.3, stir and...

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Abstract

The invention discloses a method for preparing resistant dextrin from esterified starch, belonging to the technical field of preparation of resistant dextrin. The preparation method specifically comprises the following steps: adding acid into the esterified starch to adjust a pH value to 2.0-2.3, carrying out stirring at 35-40 DEG C, keeping the temperature for 30-50 minutes, and performing centrifuging to obtain acidified esterified starch; carrying out segmented high-temperature treatment on the acidified esterified starch to obtain pyrolyzed esterified starch; adding water into the pyrolyzed esterified starch to prepare an emulsion with a mass percentage content of 20-25%; adjusting the pH value to 5.8-6.0, adding high-temperature-resistant alpha-amylase, and carrying out reacting at 90-105 DEG C for 1-2 hours; conducting quick cooling, adjusting the pH value to 4.0-4.8, adding saccharifying enzyme, carrying out reacting at 55-65 DEG C for 24-36 hours, and deactivating the enzyme toobtain a semi-finished resistant dextrin product; and refining the semi-finished resistant dextrin product to obtain a finished resistant dextrin product. The esterified starch is used as a raw material and subjected to pyrolysis and enzymolysis to prepare the resistant dextrin, and the obtained resistant dextrin prepared from the esterified starch has the advantages of high dietary fiber content, excellent physicochemical properties such as excellent viscosity and excellent solubility, simple preparation operation, recyclability of acid, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of resistant dextrin, and in particular relates to a method for preparing resistant dextrin by using esterified starch. Background technique [0002] Dietary fiber is a carbohydrate that cannot be digested by the human body. It is divided into two categories: insoluble and water-soluble fiber. [0003] Resistant dextrin is a new form of low-calorie dextran, an important low-molecular, non-viscous, water-soluble dietary fiber that can be fermented in the colon by colonic bacteria. Resistant dextrin is a sugar mixture obtained by using starch as raw material, which is partially degraded after heat treatment in acid solution, and then undergoes glycosylation reaction. Resistant dextrin contains α-1,6, α-1,2, α-1,3 glycosidic bonds and other links in the body's digestive enzymes cannot digest the part. Because resistant dextrin is difficult or slow to digest in the human digestive system, it is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B30/18
CPCC08B30/18
Inventor 刘宗利李克文孔刘娟栾庆民李新华周中凯柴雄尹郑王红霞
Owner BAOLINGBAO BIOLOGY