Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Amphoteric alkenyl succinic starch ester and preparation method for low-viscosity products thereof

A technology of alkenyl succinic acid and alkenyl succinic anhydride, which is applied in the field of preparation of amphoteric alkenyl succinic acid starch ester and low-viscosity products thereof, can solve the problems of complicated manufacturing steps and processes, high production technical requirements, large gaps, etc. problems and achieve good economic results

Inactive Publication Date: 2014-12-24
SOUTH CHINA UNIV OF TECH
View PDF6 Cites 10 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Sizing and cationic etherification reaction: Stir 1000 kg of dry corn starch into water to obtain a starch emulsion. The dry solid content of the emulsion is 45% (w / w), and 50 kg of sodium sulfate is added. Increase the temperature to 50℃, adjust the pH of the starch milk to 11.0 with 4% (w / w) sodium hydroxide solution, maintain the temperature and pH of the starch milk, and add 50 kg of 3-chloro-2-hydroxypropyl trimethyl Base ammonium chloride, then stirred from time to time, and reacted for 24.0 hours. After 20.0 hours of reaction, the pH of the system was no longer adjusted.

[0040] (2) Esterification reaction and neutralization: Keep at 45°C, add 80 kg of dodecenyl succinic anhydride, keep the pH of the emulsion at 10.0, esterification time 20.0 hours, and use 10% (v / v) hydrochloric acid The pH of the solution adjustment system is 7.0.

[0041] (3) Deliquoring, washing, and dehydrating: the material obtained in the above steps is deliquored with a filter press, wa...

Embodiment 2

[0044] (1) Sizing and cationic etherification reaction: Stir 1000 kg of dry corn starch into water to obtain a starch emulsion. The dry solid content of the emulsion is 45% (w / w), and 50 kg of sodium sulfate is added. Increase the temperature to 50℃, adjust the pH of the starch milk to 11.0 with 4% (w / w) sodium hydroxide solution, maintain the temperature and pH of the starch milk, and add 50 kg of 3-chloro-2-hydroxypropyl trimethyl Base ammonium chloride, then stirred from time to time, and reacted for 24.0 hours. After 20.0 hours of reaction, the pH of the system was no longer adjusted.

[0045] (2) Esterification reaction: Keep at 45°C, add 30 kg of dodecenyl succinic anhydride, keep the pH of the emulsion at 10.0, and the esterification time is 18.0 hours. Adjust the pH of the system to 7.0 with a concentration of 10% (v / v) hydrochloric acid solution.

[0046] (3) Deliquoring, washing, and dehydrating: the material obtained in the above steps is deliquored with a filter press...

Embodiment 3

[0049] (1) Sizing and cationic etherification reaction: Stir 1000 kg of dry corn starch into water to obtain a starch emulsion. The dry solid content of the emulsion is 45% (w / w), and 50 kg of sodium sulfate is added. Increase the temperature to 50℃, adjust the pH of the starch milk to 11.0 with 4% (w / w) sodium hydroxide solution, maintain the temperature and pH of the starch milk, and add 50 kg of 3-chloro-2-hydroxypropyl trimethyl Base ammonium chloride, then stirred from time to time, and reacted for 24.0 hours. After 20.0 hours of reaction, the pH of the system was no longer adjusted.

[0050] (2) Esterification reaction: Keep at 45°C, add 10 kg of dodecenyl succinic anhydride, keep the pH of the emulsion at 10.0, and the esterification time is 6.0 hours. Adjust the pH of the system to 7.0 with a concentration of 10% (v / v) hydrochloric acid solution.

[0051] (3) Deliquoring, washing, and dehydrating: the material obtained in the above steps is deliquored with a filter press,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
degree of substitutionaaaaaaaaaa
degree of substitutionaaaaaaaaaa
degree of substitutionaaaaaaaaaa
Login to View More

Abstract

The invention discloses an amphoteric alkenyl succinic starch ester and a preparation method for low-viscosity products of the amphoteric alkenyl succinic starch ester. The preparation method comprises the following steps of: mixing slurry of raw starch, adding an alkali liquor, and feeding 3-chloro-2-hydroxypropyl trimethyl ammonium chloride to carry out a cationic etherification reaction; feeding alkenyl succinic anhydride to carry out esterification, carrying out neutralization, exhausting a fluid, washing, carrying out dehydration and pneumatic drying, and cooling to obtain amphoteric alkenyl succinic starch ester products, or after the alkenyl succinic anhydride is esterified, feeding a sodium hypochlorite solution again to carry out oxidation, adding a reducing agent to be reduced, neutralizing by a hydrochloric acid solution, exhausting the fluid, washing, carrying out dehydration and pneumatic drying, and cooling to obtain low-viscosity amphoteric alkenyl succinic starch ester products. The products prepared by the invention have different surface activities, charge characteristics of anions and cations of different quantity proportions, different viscosity and fluidity ranges, versatility, wide application ranges, suitability for non-food industrial uses such as pesticides, thickeners, emulsifiers or microencapsulated materials of the daily chemical industry, and good effects.

Description

technical field [0001] The invention relates to a preparation method of starch ester and its low-viscosity product, in particular to a preparation method of amphoteric alkenyl succinic acid starch ester and its low-viscosity product. Background technique [0002] Cationic starch has a positive charge and is a very important class of starch derivatives. It is widely used in papermaking, textiles, oil field drilling and other industrial fields. Quaternary ammonium cationic starch is one of the most important types. It is a combination of starch and 3-chloro -2-Hydroxypropyltrimethylammonium chloride is obtained by etherification reaction under alkaline conditions. Quaternary ammonium cationic starch exhibits higher positive charge characteristics in acidic and larger alkaline pH ranges, and has good application effects. It is an indispensable additive in the paper industry. Amphoteric starch refers to a compound modified starch in which both cationic groups and anionic groups...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/16C08B31/18
Inventor 黄立新刘莹莹杨博简淑贞李茹刘娟
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com