CN111675767A - Method for preparing modified starch - Google Patents
Method for preparing modified starch Download PDFInfo
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- CN111675767A CN111675767A CN202010640168.4A CN202010640168A CN111675767A CN 111675767 A CN111675767 A CN 111675767A CN 202010640168 A CN202010640168 A CN 202010640168A CN 111675767 A CN111675767 A CN 111675767A
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- Prior art keywords
- reaction
- modified starch
- starch
- producing
- solution
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- 229920000881 Modified starch Polymers 0.000 title claims abstract description 29
- 235000019426 modified starch Nutrition 0.000 title claims abstract description 29
- 239000004368 Modified starch Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title abstract description 14
- 229920002472 Starch Polymers 0.000 claims abstract description 34
- 235000019698 starch Nutrition 0.000 claims abstract description 34
- 239000008107 starch Substances 0.000 claims abstract description 34
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 239000000243 solution Substances 0.000 claims abstract description 19
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 239000005708 Sodium hypochlorite Substances 0.000 claims abstract description 12
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000006011 modification reaction Methods 0.000 claims abstract description 10
- 239000007864 aqueous solution Substances 0.000 claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000012295 chemical reaction liquid Substances 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000006266 etherification reaction Methods 0.000 claims description 11
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- 238000005886 esterification reaction Methods 0.000 claims description 6
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 claims description 5
- -1 hydroxypropyl Chemical group 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 4
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 4
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 4
- GUOCOOQWZHQBJI-UHFFFAOYSA-N 4-oct-7-enoxy-4-oxobutanoic acid Chemical compound OC(=O)CCC(=O)OCCCCCCC=C GUOCOOQWZHQBJI-UHFFFAOYSA-N 0.000 claims description 3
- 238000002036 drum drying Methods 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 238000001694 spray drying Methods 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 11
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract description 7
- 230000004048 modification Effects 0.000 abstract description 7
- 238000012986 modification Methods 0.000 abstract description 7
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract description 7
- 235000011152 sodium sulphate Nutrition 0.000 abstract description 7
- 150000003839 salts Chemical class 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 3
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 230000002401 inhibitory effect Effects 0.000 abstract description 2
- 235000002639 sodium chloride Nutrition 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- 229920002261 Corn starch Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000008120 corn starch Substances 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 238000005303 weighing Methods 0.000 description 3
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 239000001103 potassium chloride Substances 0.000 description 2
- 235000011164 potassium chloride Nutrition 0.000 description 2
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 2
- 229910052939 potassium sulfate Inorganic materials 0.000 description 2
- 235000011151 potassium sulphates Nutrition 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- C08B31/02—Esters
- C08B31/04—Esters of organic acids, e.g. alkenyl-succinated starch
-
- 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
- C08B31/08—Ethers
- C08B31/12—Ethers having alkyl or cycloalkyl radicals substituted by heteroatoms, e.g. hydroxyalkyl or carboxyalkyl starch
-
- 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
- C08B31/18—Oxidised starch
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
Abstract
The invention discloses a method for preparing modified starch, which comprises the following steps: s1, adjusting the pH value of the starch slurry to 10-11.5, adding a sodium hypochlorite aqueous solution or a hydrogen peroxide aqueous solution for reaction, and terminating the reaction to obtain an intermediate solution; and S2, taking the intermediate solution to perform modification reaction to obtain reaction liquid, and drying the reaction liquid to obtain the modified starch. According to the invention, sodium hypochlorite or hydrogen peroxide is used for reducing the viscosity of the starch slurry, and then the modification reaction is carried out, so that the problems that the starch is easy to gelatinize and expand and the viscosity is too high to influence the modification production in the modification process are avoided, and salts such as sodium sulfate and the like are not required to be added for keeping the semi-crystal state of the starch and inhibiting the expansion of the starch in the reaction; the operation is simple, no sewage is generated, and the problems of environmental pollution and high cost caused by sewage treatment are avoided.
Description
Technical Field
The invention relates to the technical field of modified starch, in particular to a method for preparing modified starch.
Background
The natural starch is subjected to proper chemical treatment, and certain chemical groups are introduced to change the molecular structure and the physicochemical properties to generate the starch derivative.
In the production and manufacture of chemically modified starch, particularly when modification is carried out by esterification and etherification reactions, salts such as sodium sulfate, potassium sulfate, sodium chloride, potassium chloride and the like are often used in the reaction process to keep the semi-crystalline state of the starch and inhibit the starch from swelling in the reaction, so that the reaction can be smoothly carried out; however, a large amount of water is used for cleaning starch after reaction, sewage containing salts such as sodium sulfate, potassium sulfate, sodium chloride, potassium chloride and the like brings great pressure to the environment, sewage treatment also brings great investment to enterprises, and production cost is increased.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method for manufacturing modified starch, which is characterized in that sodium hypochlorite or hydrogen peroxide is used for reducing the viscosity of starch slurry, then modification reaction is carried out, so that the problems that starch is easy to gelatinize and expand and the viscosity is too high to influence modification production in the modification process are solved, and salts such as sodium sulfate are not required to be added to keep the semi-crystal state of the starch and inhibit the expansion of the starch in the reaction; the operation is simple, no sewage is generated, and the problems of environmental pollution and high cost caused by sewage treatment are avoided.
The invention provides a method for preparing modified starch, which comprises the following steps:
s1, adjusting the pH value of the starch slurry to 10-11.5, adding a sodium hypochlorite aqueous solution or a hydrogen peroxide aqueous solution for reaction, and terminating the reaction to obtain an intermediate solution;
and S2, taking the intermediate solution to perform modification reaction to obtain reaction liquid, and drying the reaction liquid to obtain the modified starch.
Preferably, in S1, the reaction temperature is room temperature and the reaction time is 3-14 h.
Preferably, in S1, the weight ratio of starch to sodium hypochlorite is 100: 0.3-5.
Preferably, in S1, the weight ratio of starch to hydrogen peroxide is 100: 0.1-3.
Preferably, in S1, the mass fraction of the starch slurry is 25-45 wt%.
Preferably, in S1, the solvent of the starch slurry is water.
Preferably, in S1, the pH is adjusted to 10-11.5 with sodium hydroxide.
Preferably, in S1, the reaction is terminated by adjusting the pH to neutral with sodium thiosulfate.
Preferably, in S1, the mass fraction of the sodium hypochlorite aqueous solution is 8-12 wt%.
Preferably, in S1, the mass fraction of the aqueous hydrogen peroxide solution is 1 to 5 wt%.
Preferably, in S2, the modification reaction is at least one of an acetic acid esterification reaction, a hydroxypropyl etherification reaction, a hydroxyethyl etherification reaction, and an octenyl succinate esterification reaction.
Preferably, in S2, the modification reaction is at least one of a hydroxypropyl etherification reaction and a hydroxyethyl etherification reaction.
The methods for modifying starch by acetic esterification, hydroxypropyl etherification, hydroxyethyl etherification and octenyl succinate are conventional in the art.
Preferably, in S2, the drying method includes: spray drying or drum drying, etc.
Has the advantages that:
according to the invention, sodium hypochlorite or hydrogen peroxide is used for reducing the viscosity of the starch slurry, and then the modification reaction is carried out, so that the problems that the starch is easy to gelatinize and expand and the viscosity is too high to influence the modification production in the modification process are avoided, and salts such as sodium sulfate and the like are not required to be added for keeping the semi-crystal state of the starch and inhibiting the expansion of the starch in the reaction; the whole process does not use a large amount of water for cleaning, the reaction is directly dried, the operation is simple, the sewage cannot be generated, and the problems of environment pollution and higher cost caused by sewage treatment are solved.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A method for preparing modified starch comprises the following steps:
s1, weighing 5000g of corn starch and 7500g of water, mixing, heating to 30 ℃, and uniformly mixing to obtain starch slurry; adjusting the pH value of the starch slurry to 11.5 by using sodium hydroxide, adding 2500g of a sodium hypochlorite aqueous solution with the mass fraction of 10 wt% to react at 30 ℃ for 14h, and adjusting the pH value to be neutral by using sodium thiosulfate to obtain an intermediate solution;
and S2, adjusting the pH value of the intermediate solution to 12.0, heating to 48 ℃, adding 500g of propylene oxide, reacting for 2 hours to obtain a reaction solution, drying the reaction solution in a roller, crushing, and packaging to obtain the modified starch.
Example 2
A method for preparing modified starch comprises the following steps:
s1, weighing 5000g of corn starch and 7500g of water, mixing, heating to 23 ℃, and uniformly mixing to obtain starch slurry; adjusting the pH value of the starch slurry to 10-11 by using sodium hydroxide, adding 150g of a sodium hypochlorite aqueous solution with the mass fraction of 10 wt% to react at 23 ℃ for 3h, and adjusting the pH value to be neutral by using sodium thiosulfate to obtain an intermediate solution;
and S2, adjusting the pH value of the intermediate solution to 8.0, keeping the temperature below 23 ℃, adding 500g of acetic anhydride to react for 15min, then adjusting the pH value to 6 to obtain a reaction solution, drying the reaction solution in a roller, crushing and packaging to obtain the modified starch.
Comparative example
A method for preparing modified starch comprises the following steps:
weighing 5000g of corn starch and 7500g of water, mixing, heating to 30 ℃, and uniformly mixing to obtain starch slurry;
adding 1500g of sodium sulfate into the starch slurry, uniformly mixing, adjusting the pH value to 12.0, adding the mixture, heating to 48 ℃, adding 500g of propylene oxide, reacting for 2 hours to obtain a reaction solution, filtering to obtain a filter cake, washing with water for 4 times, wherein the water consumption is 5000g of the reaction solution each time, drying, crushing and packaging to obtain the modified starch.
The water consumption and the sewage treatment cost in examples 1 to 4 and comparative example were counted, and the results are shown in the following table:
| item | Sodium sulfate dosage g | Amount of water used g |
| Example 1 | 0 | 7500 |
| Example 2 | 0 | 7500 |
| Example 3 | 0 | 7500 |
| Example 4 | 0 | 7500 |
| Comparative example | 1500g | 27500 |
The above table shows that the invention has the advantages of low water consumption, no sewage generation, no environmental pollution, no sewage treatment cost and production cost reduction.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A method for producing a modified starch, comprising the steps of:
s1, adjusting the pH value of the starch slurry to 10-11.5, adding a sodium hypochlorite aqueous solution or a hydrogen peroxide aqueous solution for reaction, and terminating the reaction to obtain an intermediate solution;
and S2, taking the intermediate solution to perform modification reaction to obtain reaction liquid, and drying the reaction liquid to obtain the modified starch.
2. The method for producing a modified starch according to claim 1, wherein the reaction temperature is room temperature and the reaction time is 3 to 14 hours in S1.
3. The method for producing a modified starch according to claim 1 or 2, wherein the weight ratio of starch to sodium hypochlorite in S1 is 100: 0.3-5.
4. The method for producing a modified starch according to any one of claims 1 to 3, wherein the weight ratio of starch to hydrogen peroxide in S1 is 100:0.1 to 3.
5. The method for producing a modified starch according to any one of claims 1 to 4, wherein the mass fraction of the starch slurry in S1 is 25 to 45 wt%; preferably, in S1, the solvent of the starch slurry is water.
6. The method for producing a modified starch according to any one of claims 1 to 5, wherein the pH of the modified starch is adjusted to 10 to 11.5 with sodium hydroxide in S1.
7. The method for producing a modified starch according to any one of claims 1 to 6, wherein the reaction is terminated at S1 by adjusting the pH to neutral with sodium thiosulfate.
8. The method for producing a modified starch according to any one of claims 1 to 7, wherein the mass fraction of the aqueous sodium hypochlorite solution in S1 is 8 to 12 wt%; preferably, in S1, the mass fraction of the aqueous hydrogen peroxide solution is 1 to 5 wt%.
9. The method for producing a modified starch according to any one of claims 1 to 8, wherein in S2, the modification reaction is at least one of an acetic acid esterification reaction, a hydroxypropyl etherification reaction, a hydroxyethyl etherification reaction, and an octenyl succinate esterification reaction; preferably, in S2, the modification reaction is at least one of a hydroxypropyl etherification reaction and a hydroxyethyl etherification reaction.
10. The method for producing a modified starch according to any one of claims 1 to 9, wherein in S2, the drying method comprises: spray drying or drum drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010640168.4A CN111675767A (en) | 2020-07-06 | 2020-07-06 | Method for preparing modified starch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010640168.4A CN111675767A (en) | 2020-07-06 | 2020-07-06 | Method for preparing modified starch |
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| CN111675767A true CN111675767A (en) | 2020-09-18 |
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| CN202010640168.4A Pending CN111675767A (en) | 2020-07-06 | 2020-07-06 | Method for preparing modified starch |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0143643A1 (en) * | 1983-11-28 | 1985-06-05 | Cpc International Inc. | Production of a cross-bonded starch |
| CN101628945A (en) * | 2009-07-15 | 2010-01-20 | 聚祥(厦门)淀粉有限公司 | Complex modified starch |
| CN104262494A (en) * | 2014-09-30 | 2015-01-07 | 华南理工大学 | Method for preparing low-viscosity amphoteric starch |
| CN104277127A (en) * | 2013-07-10 | 2015-01-14 | 江苏宝宝宿迁国民生物科技有限公司 | Preparation method for oxidized esterified rice starch |
| CN109400726A (en) * | 2018-10-23 | 2019-03-01 | 东莞东美食品有限公司 | A kind of preparation method of the oxidation hydroxypropul starch for capsule for medicine |
-
2020
- 2020-07-06 CN CN202010640168.4A patent/CN111675767A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0143643A1 (en) * | 1983-11-28 | 1985-06-05 | Cpc International Inc. | Production of a cross-bonded starch |
| CN101628945A (en) * | 2009-07-15 | 2010-01-20 | 聚祥(厦门)淀粉有限公司 | Complex modified starch |
| CN104277127A (en) * | 2013-07-10 | 2015-01-14 | 江苏宝宝宿迁国民生物科技有限公司 | Preparation method for oxidized esterified rice starch |
| CN104262494A (en) * | 2014-09-30 | 2015-01-07 | 华南理工大学 | Method for preparing low-viscosity amphoteric starch |
| CN109400726A (en) * | 2018-10-23 | 2019-03-01 | 东莞东美食品有限公司 | A kind of preparation method of the oxidation hydroxypropul starch for capsule for medicine |
Non-Patent Citations (2)
| Title |
|---|
| 吴帅 等: ""羟丙基氧化高直链玉米淀粉的制备、表征及性能研究"", 《粮食与饲料工业》 * |
| 陈泽森 等编: "《水性建筑涂料生产技术》", 31 January 2007, 中国纺织出版社 * |
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Application publication date: 20200918 |
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