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Acid-heat degradation preparation method of low-viscosity octenyl succinic anhydride modified starch

A technology of octenyl succinic acid and starch ester, which is applied in the field of octenyl succinic acid starch ester products, can solve the problems of limited application, large quality gap, high starch viscosity, etc., and achieve good economic benefits

Active Publication Date: 2014-10-08
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

[0035] (1) Sizing and esterification reaction: mix 1000 dry weight parts of cornstarch with water, the milk concentration is 40.0% (w / w), the temperature is raised to 50°C, and the concentration is 10% (w / w) sodium carbonate solution Adjust the pH of the starch milk to 9.5, maintain the temperature and pH of the starch milk, add 1% (to the starch) octenyl succinic anhydride for esterification reaction for 6 hours, and neutralize the starch with a 10% (v / v) hydrochloric acid solution Milk pH to 6.0.

[0036] (2) Deliquification and washing, slurry adjustment and acidification, acidification reaction: the neutralized starch emulsion is used to remove the waste liquid with a filter press, washed with water until the conductivity of the lotion is not greater than 100μs / cm, and the filter cake is adjusted with water. Use 10% (w / w) oxalic acid solution to adjust the pH of the emulsion to 2.0, and the dry solids concentration of the emulsion to 25% (w / w), raise the temperature to 50°...

Embodiment 2

[0041] (1) Sizing and esterification reaction: mix 1000 dry weight parts of cornstarch with water, the milk concentration is 42.0% (w / w), the temperature is raised to 45°C, and the concentration is 10% (w / w) of sodium carbonate solution Adjust the pH of the starch milk to 9.0, maintain the temperature and pH of the starch milk, add 3% (to the starch) octenyl succinic anhydride for esterification reaction for 14 hours, and neutralize the starch with a 10% (v / v) hydrochloric acid solution Milk pH to 6.0.

[0042] (2) Deliquification and washing, slurry adjustment and acidification, acidification reaction: the neutralized starch emulsion is used to remove the waste liquid with a filter press, washed with water until the conductivity of the lotion is not greater than 100μs / cm, and the filter cake is adjusted with water. Use 10% (w / w) oxalic acid solution to adjust the pH of the emulsion to 2.5, the dry solids concentration of the emulsion is 20% (w / w), raise the temperature to 45°...

Embodiment 3

[0047] (1) Sizing and esterification reaction: mix 1000 dry weight parts of cornstarch with water, the milk concentration is 42.0% (w / w), the temperature is raised to 45°C, and the concentration is 10% (w / w) of sodium carbonate solution Adjust the pH of the starch milk to 9.0, maintain the temperature and pH of the starch milk, add 3% (to the starch) octenyl succinic anhydride for esterification reaction for 14 hours, and neutralize the starch with a 10% (v / v) hydrochloric acid solution Milk pH to 6.0.

[0048] (2) Deliquification and washing, slurry adjustment and acidification, acidification reaction: the neutralized starch emulsion is used to remove the waste liquid with a filter press, washed with water until the conductivity of the lotion is not greater than 100μs / cm, and the filter cake is adjusted with water. Use 10% (w / w) oxalic acid solution to adjust the pH of the emulsion to 2.5, the dry solids concentration of the emulsion is 20% (w / w), raise the temperature to 45°...

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PUM

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Abstract

The invention discloses an acid-heat degradation preparation method of a low-viscosity water-soluble octenyl succinic anhydride modified starch product. The method comprises the following steps: raw starch is prepared into a slurry; alkaline liquid is added; under a starch gelatinization temperature, octenyl succinic anhydride is fed, and an esterification reaction is allowed for more than 8 hours; neutralization and liquid-removal are carried out; purified water is used for washing and refining; a filter cake is prepared into a slurry with water; the pH value is regulated by using an oxalic acid solution; an acid hydrolysis reaction is carried out; a high-temperature acid-heat treatment is carried out under continuous ejection under a temperature of 125-130 DEG C by using a hydrothermal device; laminar-flow thermal insulation is carried out; cooling is carried out; a saturated calcium hydroxide solution is added, or a calcium carbonate emulsion and a sodium carbonate solution are added; the mixture is stirred such that neutralization is carried out; active carbon is added; pressure filtration is carried out; the filtrate is concentrated under vacuum; fine filtration is carried out; spray drying is carried out; and the product is cooled and packaged. With the method, the low-viscosity water-soluble octenyl succinic anhydride modified starch product is obtained. The product is suitable to be used as an emulsifier of foods and daily chemicals, or as a microencapsulation material. With the method, the low-viscosity water-soluble octenyl succinic anhydride modified starch product can be produced, and good economical benefit can be achieved.

Description

technical field [0001] The invention relates to a process method of acid-heat degradation to prepare low-viscosity water-soluble starch octenyl succinate, which can be used as an emulsification stabilizer for food and daily chemical industry or as an embedding material for microcapsules. 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] Octenyl Succinic Anhydride Modified Starch (OSA-Starch for short) is a modified starch product developed by Caldwell and Wurzburg in the United States. It applied for a patent in 1953. The U.S. Food and Drug A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B31/04
Inventor 黄立新杨博简淑贞陈宏彬王立亚
Owner SOUTH CHINA UNIV OF TECH
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