Technique for producing low viscosity octenylsuccinate starch by oxidation process

Abstract

The invention discloses a technique for producing octenyl succinate starch ester with low viscosity by an oxidation method, which comprises steps as follows: waxy rice starch and water are prepared to be starch milk in a reaction vessel, then the starch milk is heated to 34 DEG C to 38 DEG C, and a sodium hydroxide solution is added for adjusting the PH value between 9.3 and 9.7; sodium hypochlorite is added to carry out oxidation reaction, and the PH value and the reaction temperature are kept; sodium pyrosulfite is added to carry out reduction reaction, and a hydrochloride solution is added in the reaction process to adjust the PH value of the starch milk between 8.5 and 9.0, and the temperature is cooled to 28 DEG C to 31 DEG C, and then octenyl succinic anhydride with 2 percent to 3 percent of the total mass of absolute dry starch is added to carry out esterification reaction; and after the esterification reaction, the hydrochloride solution is added to neutralize the PH value of the starch milk between 5.5 and 6.5, and the finished product can be obtained by washing and drying the neutralized starch milk. By adopting the technique for producing the octenyl succinate starch ester with low viscosity by the oxidation method, the product is high in esterification reaction efficiency, good in emulsifying properties and high in product quality.

Description

technical field [0001] The invention belongs to the technical field of starch processing, in particular to a process for producing low-viscosity starch octenyl succinate by oxidation. Background technique [0002] Starch octenyl succinate is a kind of starch ester with hydrophobic properties, which has the characteristics of high emulsification and good stability. It is widely used in oil plant embedding industry, embedding agent for microencapsulated products, and fat substitute . However, at present, the methods of first acidifying starch and then esterifying starch, or enzymolyzing starch and then esterifying starch are often used for production, but the products produced by these two methods have many defects, such as enzyme preparations in enzymatic hydrolysis products. With a certain color, it is not easy to come out when washing, which makes the product darker in color, poor in whiteness, poor in transparency of paste liquid, low in hydrophilicity, poor in stability,...

AI Technical Summary

Problems solved by technology

However, at present, the methods of first acidifying starch and then esterifying starch, or enzymolyzing starch and then esterifying starch are often used for production, but the products produced by these two methods have many defects, such as enzyme preparations in enzymatic hydrolysis products. With a certain color, it is not easy to come out when washing, making the product darker in color, poor in whiteness, poor in transparency of paste liquid, low in hydrophilicity, poor in stability, easy to age starch, and strong gelation in acid hydrolyzed products , poor hydrophilicity, which affects the use effect of the product, and also has the defects of darker color and poor transparency of the paste