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Preparation method of low viscosity octenyl succinic anhydride modified starch (OSA-starch) by oxidative degradation and enzymolysis

An alkenyl succinic acid, oxidative degradation technology, applied in the direction of fermentation, etc., can solve the problems of large quality gap, limited application, complex manufacturing steps and processes, etc., and achieve the effect of improving emulsification and good economic benefits

Inactive Publication Date: 2015-01-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of octenyl succinic acid starch ester is a compound modified starch product. Different degradation methods and degrees can produce a series of products with different qualities. There are many varieties. The manufacturing steps and processes are relatively complicated, and the requirements for production technology are high. Domestic The quality of the product is far behind that of foreign countries
[0007] After the starch is esterified with octenyl succinic anhydride, a long carbon chain is introduced, which increases the paste viscosity of the esterified starch, and the viscosity of the modified starch is very high. high, limiting its application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Sizing and esterification reaction: Slurry 1000 kg dry corn starch with water, milk concentration 40.0% (w / w), heat up to 50°C, and sodium carbonate solution with a concentration of 10% (w / w) Regulate the pH of the starch milk to be 8.5, maintain the temperature and pH of the starch milk, and feed 10 kg of octenyl succinic anhydride for esterification reaction for 8.0 hours.

[0041] (2) Oxidation reaction: keep the temperature at 50°C, add a calcium hypochlorite solution with an available chlorine content of 10 kg to carry out the oxidation reaction, control the velocity of the flow, keep the pH at 8.5, and react for 2.0 hours.

[0042] (3) Continuous spray high temperature treatment, heat preservation treatment, reduction: use a water heater to conduct continuous spray high temperature treatment on the oxidized modified starch milk at 125°C for 4.0 minutes, and keep it at 90°C~92°C for 1.0 hour in laminar flow; cool down to 60°C ℃, stirring and adding 0.053 kg of ...

Embodiment 2

[0047] (1) Sizing and esterification reaction: Slurry 1000 kg dry corn starch with water, milk concentration 45.0% (w / w), heat up to 45°C, and sodium carbonate solution with a concentration of 10% (w / w) Regulate the pH of the starch milk to be 9.0, maintain the temperature and pH of the starch milk, and feed 30 kg of octenyl succinic anhydride for esterification reaction for 14.0 hours.

[0048] (2) Oxidation reaction: keep the temperature at 45°C, add a calcium hypochlorite solution with an available chlorine content of 30 kg to carry out the oxidation reaction, control the velocity of the flow, keep the pH at 9.0, and react for 3.0 hours.

[0049] (3) Continuous spray high temperature treatment, heat preservation treatment, reduction: use a water heater to conduct continuous spray high temperature treatment on the oxidized modified starch milk at 125°C for 3.0 minutes, and keep it at 95°C~97°C for 1.5 hours in laminar flow; cool down to 63 ℃, stirring and adding 0.103 kg of ...

Embodiment 3

[0054] (1) Sizing and esterification reaction: Slurry 1000 kg dry corn starch with water, milk concentration 45.0% (w / w), heat up to 45°C, and sodium carbonate solution with a concentration of 10% (w / w) Regulate the pH of the starch milk to be 9.0, maintain the temperature and pH of the starch milk, and feed 30 kg of octenyl succinic anhydride for esterification reaction for 14.0 hours.

[0055] (2) Oxidation reaction: keep the temperature at 45°C, add a calcium hypochlorite solution with an available chlorine content of 60 kg to carry out the oxidation reaction, control the flow velocity, keep the pH at 9.0, and react for 4.0 hours.

[0056] (3) Continuous spray high temperature treatment, heat preservation treatment, reduction: use a water heater to conduct continuous spray high temperature treatment on the oxidized modified starch milk at 125°C for 3.0 minutes, and keep it at 97°C~99°C for 2.0 hours in laminar flow; cool down to 63 ℃, stir and add 0.146 kg of calcium metabi...

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Abstract

The invention discloses a preparation method of low viscosity octenyl succinic anhydride modified starch (OSA-starch) by oxidative degradation and enzymolysis. The method comprises the following steps: pulping original starch, adding alkali liquor, feeding alkenyl succinic anhydride for esterification, and reacting for 6.0-20.0 hours; feeding a calcium hypochlorite solution for oxidization, and reacting for 2.0-4.0 hours; carrying out high-heat treatment for continuous injection, and insulating by a laminar flow; cooling, reducing by a reducing agent, then adding an oxalic acid solution, stirring and neutralizing to adjust the pH value, and adding pullulanase for debranched enzymolysis; adding active carbon, raising temperature and decoloring, and carrying out filter pressing; and carrying out vacuum concentration on the filtrate, finely filtering, spray-drying, cooling and packaging to obtain a water soluble low viscosity OSA-starch product which is suitable for emulsifiers or microcapsule embedding materials for chemical products such as pesticides, articles for daily use, and the like.

Description

technical field [0001] The invention relates to a process using oxidative degradation and enzymatic hydrolysis, in particular to a preparation method of oxidative degradation and enzymatic hydrolysis of low-viscosity alkenyl succinic acid starch ester. Background technique [0002] Alkenyl succinic acid starch ester is a kind of starch ester product obtained by esterification reaction of raw starch or starch derivatives with alkenyl succinic anhydride Alkenyl Succinic Anhydride containing carbon chains of different lengths under alkaline conditions. The alkenyl succinic anhydrides used include octenyl succinic anhydride, decenyl succinic anhydride, dodecenyl succinic anhydride and hexadecenyl succinic anhydride, etc. Currently, only octenyl succinic anhydride is allowed to be used for edible starch modification. . [0003] Octenyl Succinic Anhydride Modified Starch (OSA-Starch for short) is a modified starch product developed by Caldwell and Wurzburg in the United States. I...

Claims

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Application Information

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IPC IPC(8): C12P19/16C12P19/04C08B31/04C08B31/18
Inventor 黄立新刘莹莹简淑贞杨博李茹刘娟
Owner SOUTH CHINA UNIV OF TECH
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