A kind of acid heat degradation preparation method of low-viscosity octenyl succinic acid starch ester

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...

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 modified starch has a high viscosity, which limits its application.