Preparation method of low-viscosity octenyl succinic acid starch ester by acid-thermal degradation and enzymatic hydrolysis

Abstract

The invention discloses an acid-heat degradation and enzymolysis preparation method of low-viscosity octenyl succinic anhydride modified starch. The method comprises the following steps: raw starch is prepared into a slurry; alkaline liquid is added; octenyl succinic anhydride is fed; an esterification reaction is allowed; neutralization and liquid-removal are carried out; washing refining is carried out; a filter cake is prepared into a slurry; the pH value is regulated; an acid hydrolysis reaction is carried out; a continuous-ejection high-temperature acid-heat treatment is carried out; laminar-flow thermal insulation is carried out; cooling is carried out; a saturated calcium hydroxide solution is added; the mixture is stirred such that neutralization is carried out; pullulanase is added for carrying out debranching enzymolysis; active carbon is added; temperature is increased and decolorization is carried out; pressure filtration is carried out; the filtrate is concentrated under vacuum; fine filtration is carried out; spray drying is carried out; and cooling and packaging are carried out, such that a 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. With a pullulanase debranching effect upon modified starch molecules, more products with linear or low-branch-degree molecular structures can be produced, such that product emulsifying and film-forming properties can be improved.

Description

technical field [0001] The invention relates to a process method using acid-heat degradation and enzymatic degradation, in particular to a method for preparing low-viscosity octenyl succinic acid starch ester by acid-heat degradation and enzymolysis. 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 Administration (FDA) classified OSA sta...

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.