CN110845631A - Preparation method of acid-treated modified starch - Google Patents
Preparation method of acid-treated modified starch Download PDFInfo
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- CN110845631A CN110845631A CN201911116729.4A CN201911116729A CN110845631A CN 110845631 A CN110845631 A CN 110845631A CN 201911116729 A CN201911116729 A CN 201911116729A CN 110845631 A CN110845631 A CN 110845631A
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- starch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
- C08B31/00—Preparation of derivatives of starch
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Abstract
The invention provides a preparation method of acid-treated modified starch, which comprises the steps of uniformly mixing native starch and water to prepare starch emulsion, adjusting the concentration of the starch emulsion, then reacting the adjusted starch emulsion with a hydrochloric acid solution to carry out acid treatment, and then neutralizing with an alkaline solution to control the pH value, thereby obtaining the acid-treated modified starch. The method for preparing the acid-treated modified starch is convenient and rapid, has low technical requirement, wide adaptability, high product yield, simple and convenient operation, controllable product quality and high stability.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of production of modified starch, in particular to a preparation method of acid-treated modified starch.
[ background of the invention ]
Acid-treated starch, also known as acid-treated modified starch, is a soluble starch which remains in the granular state after dissolution and has good transparency and fluidity, and therefore, also known as soluble modified starch, is dissolved by slight heating, has increased fluidity and reduced viscosity, which is about 5 times lower than the intrinsic viscosity of the original starch. The starch solution is easy to age due to the occurrence of molecular fragments in the reaction process, the viscosity of the starch solution is increased in the heating process when the concentration is high, the starch solution shows a strong gelatinization process after being cooled, and strong gel can be formed. In addition, it can be used in processes requiring film-forming properties and adhesion. Since acid-treated modified starch is used widely, a simple preparation method is required.
[ summary of the invention ]
Aiming at the defects of the prior art, the invention provides a preparation method of acid-treated modified starch.
In order to solve the technical problems, the invention adopts the following technical scheme:
a preparation method of acid-treated modified starch comprises the following steps:
(1) adding water into native starch, and mixing uniformly in a feeding tank to obtain starch emulsion;
(2) adding hydrochloric acid into a feeding tank, adjusting the pH value of the starch emulsion to acidity, carrying out acidolysis reaction at 35-55 ℃, and obtaining a reaction solution after the acidolysis reaction is finished;
(3) adding an alkaline solution into the feeding tank to neutralize the reaction solution to obtain a neutralized solution after reaction;
(4) and washing, dehydrating, airflow drying and screening the neutralization solution to obtain the acid-treated modified starch, and then packaging the modified starch into a finished product.
In a further improvement, the concentration of the starch milk is 16-25 Baume degrees.
In a further improvement scheme, the mass fraction of the hydrochloric acid is 5-45%.
In a further improvement, in the step (2), the pH value of the starch emulsion is adjusted to 0.5-3.0 by hydrochloric acid.
In a further improvement, in the step (3), after the alkaline solution is neutralized with the reaction solution, the pH value of the neutralized solution is 4.5-6.5.
In a further refinement, the alkaline solution is a dilute sodium hydroxide solution.
Compared with the prior art, the invention has the beneficial effects that: the method for preparing the acid-treated modified starch is convenient and rapid, has low technical requirement, wide adaptability, high product yield, simple and convenient operation, controllable product quality and high stability.
The present invention will be described in further detail with reference to specific embodiments below:
[ detailed description ] embodiments
The advantages and features of the present invention will become more apparent from the following description of the embodiments of the invention given by way of example. These examples are illustrative only and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
Example one
A preparation method of acid-treated modified starch comprises the following steps:
(1) adding water into corn starch, and uniformly mixing in a feeding tank to obtain starch emulsion, wherein the concentration of the starch emulsion is 16 Baume degrees;
(2) adding hydrochloric acid with the mass fraction of 5% into a feeding tank, adjusting the pH value of the starch emulsion to 0.5, performing acidolysis reaction at 35 ℃, and obtaining a reaction solution after the acidolysis reaction is finished;
(3) adding a dilute sodium hydroxide solution into a feeding tank to neutralize the reaction solution to obtain a neutralized solution after reaction, wherein the pH value of the neutralized solution is 4.5;
(4) and washing, dehydrating, airflow drying and screening the neutralization solution to obtain the acid-treated modified starch, and then packaging the modified starch into a finished product.
Example two
A preparation method of acid-treated modified starch comprises the following steps:
(1) adding water into wheat starch, and uniformly mixing in a feeding tank to obtain a starch emulsion, wherein the concentration of the starch emulsion is 20 Baume degrees;
(2) adding 25% by mass of hydrochloric acid into a feeding tank, adjusting the pH value of the starch emulsion to 2.0, performing acidolysis reaction at 45 ℃, and obtaining a reaction solution after the acidolysis reaction is finished;
(3) adding a dilute sodium hydroxide solution into a feeding tank to neutralize the reaction solution to obtain a neutralized solution after reaction, wherein the pH value of the neutralized solution is 5.5;
(4) and washing, dehydrating, airflow drying and screening the neutralization solution to obtain the acid-treated modified starch, and then packaging the modified starch into a finished product.
EXAMPLE III
A preparation method of acid-treated modified starch comprises the following steps:
(1) adding water into cassava starch, and uniformly mixing in a feeding tank to obtain a starch emulsion, wherein the concentration of the starch emulsion is 25 Baume degrees;
(2) adding hydrochloric acid with the mass fraction of 45% into a feeding tank, adjusting the pH value of the starch emulsion to 3.0, performing acidolysis reaction at 55 ℃, and obtaining a reaction solution after the acidolysis reaction is finished;
(3) adding a dilute sodium hydroxide solution into a feeding tank to neutralize the reaction solution to obtain a neutralized solution after reaction, wherein the pH value of the neutralized solution is 6.5;
(4) and washing, dehydrating, airflow drying and screening the neutralization solution to obtain the acid-treated modified starch, and then packaging the modified starch into a finished product.
Claims (6)
1. The preparation method of the acid-treated modified starch is characterized by comprising the following steps of:
(1) adding water into native starch, and mixing uniformly in a feeding tank to obtain starch emulsion;
(2) adding hydrochloric acid into a feeding tank, adjusting the pH value of the starch emulsion to acidity, carrying out acidolysis reaction at 35-55 ℃, and obtaining a reaction solution after the acidolysis reaction is finished;
(3) adding an alkaline solution into the feeding tank to neutralize the reaction solution to obtain a neutralized solution after reaction;
(4) and washing, dehydrating, airflow drying and screening the neutralization solution to obtain the acid-treated modified starch, and then packaging the modified starch into a finished product.
2. The method for preparing acid-treated modified starch according to claim 1, wherein the concentration of the starch milk is 16 to 25 Baume degrees.
3. The method for preparing acid-treated modified starch according to claim 1, wherein the mass fraction of the hydrochloric acid is 5-45%.
4. The method for preparing acid-treated modified starch according to claim 1, wherein the pH of the starch emulsion is adjusted to 0.5 to 3.0 by hydrochloric acid in the step (2).
5. The method for preparing acid-treated modified starch according to claim 1, wherein in the step (3), after the alkaline solution is neutralized with the reaction solution, the pH value of the neutralized solution is 4.5 to 6.5.
6. The method according to claim 1, wherein the alkaline solution is a dilute sodium hydroxide solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116729.4A CN110845631A (en) | 2019-11-15 | 2019-11-15 | Preparation method of acid-treated modified starch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911116729.4A CN110845631A (en) | 2019-11-15 | 2019-11-15 | Preparation method of acid-treated modified starch |
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| CN110845631A true CN110845631A (en) | 2020-02-28 |
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| CN201911116729.4A Pending CN110845631A (en) | 2019-11-15 | 2019-11-15 | Preparation method of acid-treated modified starch |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891829A (en) * | 2010-07-08 | 2010-11-24 | 广西大学 | Acid hydrolysis modified starch and method for preparing same |
| CN104650248A (en) * | 2013-11-15 | 2015-05-27 | 杜若楠 | Acid-modified starch extraction technology |
| CN105294865A (en) * | 2015-11-16 | 2016-02-03 | 大兴安岭林格贝寒带生物科技股份有限公司 | Manufacturing technology of modified starch |
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2019
- 2019-11-15 CN CN201911116729.4A patent/CN110845631A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891829A (en) * | 2010-07-08 | 2010-11-24 | 广西大学 | Acid hydrolysis modified starch and method for preparing same |
| CN104650248A (en) * | 2013-11-15 | 2015-05-27 | 杜若楠 | Acid-modified starch extraction technology |
| CN105294865A (en) * | 2015-11-16 | 2016-02-03 | 大兴安岭林格贝寒带生物科技股份有限公司 | Manufacturing technology of modified starch |
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Application publication date: 20200228 |