Method for preparing low-viscosity amphoteric starch by using dilutedly cooked starch

A technology for thin-cooking starch and amphoteric starch, which is applied in the field of preparation of low-viscosity amphoteric starch, can solve the problems of large gap, high production technical requirements, complex production and manufacturing steps and processes, etc.

Inactive Publication Date: 2015-01-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different degradation methods and degrees can produce a series of products with different qualities. There are many varieties. The manufacturing steps and processes are more complicated. The requirements for production technology are higher. The quality of domestic products is far behind that of foreign countries.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026](1) Sizing and cationic etherification reaction: Stir 1,000 kg dry weight of 22.6°F corn acid-modified starch into water to obtain a starch emulsion. The dry solids concentration of the emulsion is 45% (w / w). Add 50 kg of sodium sulfate. Raise the temperature to 50°C, adjust the pH of the starch milk to 11.5 with a 4.0% (w / w) sodium hydroxide solution, maintain the temperature and pH of the starch milk, and add 50 kg of 3-chloro-2-hydroxypropyl trimethyl Hydroxyl ammonium chloride, then stirred occasionally, and reacted for 24.0 hours. After reacting for 20.0 hours, the pH of the system was no longer adjusted.

[0027] (2) Esterification reaction and neutralization: keep at 50°C, add 10 kg of hexadecenyl succinic anhydride, keep the pH of the emulsion at 10.5, and the esterification time is 8.0 hours. Use hydrochloric acid solution with a concentration of 10.0% (v / v) to adjust the pH of the system to 7.0.

[0028] (3) Dehydration, washing, and dehydration: The materia...

Embodiment 2

[0031] (1) Sizing and cationic etherification reaction: Stir 1,000 kg dry weight of 22.6°F corn acid-modified starch into water to obtain a starch emulsion. The dry solids concentration of the emulsion is 45% (w / w). Add 50 kg of sodium sulfate. Raise the temperature to 50°C, adjust the pH of the starch milk to 11.5 with a 4.0% (w / w) sodium hydroxide solution, maintain the temperature and pH of the starch milk, and add 50 kg of 3-chloro-2-hydroxypropyl trimethyl Hydroxyl ammonium chloride, then stirred occasionally, and reacted for 24.0 hours. After reacting for 20.0 hours, the pH of the system was no longer adjusted.

[0032] (2) Esterification reaction and neutralization: keep at 50°C, add 30 kg of hexadecenyl succinic anhydride, keep the pH of the emulsion at 10.5, and the esterification time is 16.0 hours. Use hydrochloric acid solution with a concentration of 10.0% (v / v) to adjust the pH of the system to 7.0.

[0033] (3) Dehydration, washing, and dehydration: The mater...

Embodiment 3

[0036] (1) Sizing and cationic etherification reaction: Stir 1,000 kg dry weight of 22.6°F corn acid-modified starch into water to obtain a starch emulsion. The dry solids concentration of the emulsion is 45% (w / w). Add 50 kg of sodium sulfate. Raise the temperature to 50°C, adjust the pH of the starch milk to 11.5 with a 4.0% (w / w) sodium hydroxide solution, maintain the temperature and pH of the starch milk, and add 10 kg of 3-chloro-2-hydroxypropyl trimethyl Hydroxyl ammonium chloride, then stirred from time to time, and reacted for 8.0 hours. After reacting for 6.0 hours, the pH of the system was no longer adjusted.

[0037] (2) Esterification reaction and neutralization: keep at 50°C, add 30 kg of hexadecenyl succinic anhydride, keep the pH of the emulsion at 10.5, and the esterification time is 16.0 hours. Use hydrochloric acid solution with a concentration of 10.0% (v / v) to adjust the pH of the system to 7.0.

[0038] (3) Dehydration, washing, and dehydration: The ma...

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PUM

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Abstract

The invention discloses a method for preparing low-viscosity amphoteric starch by using dilutedly cooked starch, which comprises the following steps: adding water into the dilutedly cooked starch to carry out paste mixing, adding alkali liquor, ceaselessly feeding 3-chloro-2-hydroxypropyltrimethyl ammonium chloride to carry out a cationic etherifying reaction, and reacting for 8.0-24.0 hours; and ceaselessly feeding alkenyl succinic anhydride to carry out esterification, reacting for 8.0-20.0 hours, and carrying out hydrochloric solution neutralization, fluid exhaustion, washing, dehydration, pneumatic drying, cooling, and packaging on the obtained product, so that low-viscosity amphoteric starch is obtained. According to the invention, multifunctional amphoteric starch series products which are different in fluidity, viscosity, surface activity, and quantitative proportions of anionic and cationic electric charge characteristics can be prepared by selecting dilutedly cooked starch such as acid-modified starch, oxidized starch, and the like which are different in fluidity and viscosity and insoluble in cold water as raw materials, therefore, the method is wide in application scope, good in effect, and applicable to the industrial applications of non-foods such as pesticides, daily chemical thickening agents, emulsifiers, or microcapsule embedding materials, and the like.

Description

technical field [0001] The invention relates to a method for preparing low-viscosity amphoteric starch, in particular to a method for preparing low-viscosity amphoteric starch from boiled starch. Background technique [0002] Starch alkenyl succinate is a kind of starch ester product obtained by esterification reaction of raw starch or starch derivatives with alkenyl succinic anhydrides containing carbon chains of different lengths under alkaline conditions. Alkenyl succinic anhydride Decenyl succinic anhydride, dodecenyl succinic anhydride and hexadecenyl succinic anhydride, currently only octenyl succinic anhydride is allowed to be used for food starch modification. [0003] Alkenyl succinic acid starch ester is a type of starch obtained by esterification of raw starch or starch derivatives with alkenyl succinic anhydride (ASA) containing different lengths of carbon chains under alkaline conditions. For ester products, the anhydrides used include octenyl succinic anhydrid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/16C08B31/12C08B31/04
Inventor 黄立新李茹刘莹莹杨博简淑贞刘娟
Owner SOUTH CHINA UNIV OF TECH
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