Preparation method of high viscosity cationic starch

A cationic starch and high-viscosity technology, which is applied in the field of modified starch, can solve the problems that the processing technology cannot meet the needs of the market, and achieve the effects of shortening the dosing time, improving the uniformity of the reaction, and scientific and reasonable process design

Inactive Publication Date: 2012-03-21
广西农垦明阳生化有限公司
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  • Description
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  • Application Information

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Problems solved by technology

With the development of modified starch and its application industry, the original processing technology cannot meet the needs of the market. The development of special-purpose, high-quality, high-value-added modified starch will help expand the application field of modified starch and improve the production of modified starch. Economic Benefits of the Enterprise

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  • Preparation method of high viscosity cationic starch
  • Preparation method of high viscosity cationic starch
  • Preparation method of high viscosity cationic starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 2kg concentration is the fresh cassava starch slurry of 43% (or adjusts starch slurry with former starch), is 0.3: 1, the aqueous solution of concentration is 20% to regulate starch slurry PH=10 with sodium hydroxide and sodium sulfate mass ratio; Heating while While adding the mixture that is prepared by 30% sodium hydroxide and 56g concentration of 69% 3-chloro-2-hydroxypropyltrimethylammonium chloride by 26g concentration, the mixture is added before the starch slurry temperature reaches 40 ℃. When the temperature reaches 40°C, stop heating; use an aqueous solution with a mass ratio of sodium hydroxide and sodium sulfate of 0.3:1 and a concentration of 20% to adjust the pH of the starch slurry to 11.5; heat up to 49-50°C, and react for 3 hours; The mass ratio of sodium to sodium sulfate is 0.3:1, 3.0ml of an aqueous solution with a concentration of 20%, add 0.08ml of epichlorohydrin and mix well, then add it to the starch slurry, and react for 3.5 hours; dehydrate the...

Embodiment 2

[0029] 2kg concentration is 43% fresh cassava starch slurry (or adjusts starch slurry with former starch), is 0.35: 1, the mixed aqueous solution that concentration is 20% to regulate starch slurry PH=11 with potassium hydroxide and sodium sulfate mass ratio; Add a mixture of 57.4g of 30% sodium hydroxide and 118.4g of 69% 3-chloro-2-hydroxypropyltrimethylammonium chloride while heating, before the temperature of the starch slurry reaches 40°C After adding the mixture, stop heating when the temperature reaches 40°C; use a mixed aqueous solution with a mass ratio of potassium hydroxide and sodium sulfate of 0.35:1 and a concentration of 20% to adjust the pH of the starch slurry to 11.5; raise the temperature to 49-50°C, and react for 3.5 hours ; Take potassium hydroxide and sodium sulfate mass ratio is 0.35: 1, concentration is 20% mixed aqueous solution 4.4ml, add 0.11ml epichlorohydrin to mix, then add in starch slurry, react for 2.5 hours; Starch slurry is dehydrated , to ob...

Embodiment 3

[0031] 2kg concentration is the potato starch slurry of 43%, with potassium hydroxide and sodium chloride mass ratio is 0.3: 1, concentration is the mixed aqueous solution of 20% to adjust starch slurry pH=11.5; A mixture of potassium hydroxide and 62.3g of 3-chloro-2-hydroxypropyltrimethylammonium chloride with a concentration of 69%. Add the mixture before the starch slurry temperature reaches 40°C, and stop when the temperature reaches 40°C Heating; adjust the pH of the starch slurry to 12 with a mixed aqueous solution of potassium hydroxide and sodium chloride with a mass ratio of 0.3:1 and a concentration of 20%; heat up to 49-50°C and react for 2.5 hours; take potassium hydroxide and sodium chloride Mix 4.0ml of aqueous solution with a mass ratio of 0.3:1 and a concentration of 20%, add 0.13ml of epichlorohydrin and mix evenly, then add it to the starch slurry, and react for 5 hours; dehydrate the starch slurry to obtain a wet solution with a water content of about 30%. ...

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Abstract

The invention relates to a preparation method of high viscosity cationic starch, which comprises the technological steps of: 1) using the mixture of an alkaline catalyst and an inhibitor to adjust the pH of starch slurry to be 10swung dash12; 2) heating and adding the mixture of an alkaline activating agent and a cationic etherifying agent, and stopping heating until the temperature reaches 40 DEG C; 3) using the mixture of the alkaline catalyst and the inhibitor to adjust the pH of the starch slurry to be 11swung dash12, keeping heating until the temperature of the starch slurry reaches 49swung dash50 DEG C, and etherifying for 1swung dash5h; 4) adding an alkaline cross-linking agent, and reacting for 1swung dash6h; and 5) dehydrating the starch slurry, obtaining green starch, adding an acidulant, mixing uniformly, acidizing the starch for 0.5swung dash2h at 50swung dash100 DEG C, and after cooling, smashing and screening, obtaining a product. The product has high paste viscosity, high acid and alkaline-resistant stabilities, and can be applied in the fields of paper making, mineral separation, oil fields, adhesives, waste water treatment and the like.

Description

technical field [0001] The invention belongs to the technical field of modified starch and relates to a preparation method of high-viscosity cationic starch. Background technique [0002] Cationic starch is obtained by reacting starch with cationic reagents. Its important feature is that it has a positive charge and has an affinity for negatively charged substances. It acts as an ionic bridge between fibers and mineral fillers and coatings. Cationic starch is widely used in papermaking, textile, mineral processing, oil field, adhesive, wastewater treatment and cosmetics and other fields. At present, there are many research reports on ordinary cationic starch, but there are few research reports on high-viscosity cationic starch, especially cationic starch with high viscosity and high viscosity stability under acidic conditions. With the development of modified starch and its application industry, the original processing technology cannot meet the needs of the market. The dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/08C08B31/12
Inventor 韦爱芬朱其虎
Owner 广西农垦明阳生化有限公司
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