Method for preparing starch ester by recycling octenyl succinic anhydride

Abstract

The invention discloses a method for utilizing octenyl succinic anhydride to produce starch ester in circulation. The method comprises steps that: water is added to 100 parts of dry basis starch; the starch is homogenized and emulsified; the pH value of the starch is regulated to 8 to 10; the starch is added to an octenyl succinic anhydride solution containing 3 parts of octenyl succinic anhydride, and is subject to a reaction; when the reaction is finished, the pH value of a reaction liquid is regulated to 5.5 to 6.5; the reaction liquid is filtered, and is processed from processes of washing, drying, crushing and sieving three times, such that white starch sodium octenyl succinate is obtained; a residual from the filtering process is mixed with the filtered washing solution, such that an octenyl succinic anhydride mixed solution is obtained; the solution is distilled, octenyl succinic anhydride is supplemented, and a solvent is added for dissolving, such that an octenyl succinic anhydride solution is obtained; water and ethanol obtained from distillation are fractionated, ethanol concentration is adjusted, and the materials can be repeatedly used. The method provided by the invention is advantaged in that: the technology is simple and is easy to control; recycling of octenyl succinic anhydride and recycling of the solvent can both be realized.

Description

technical field [0001] The invention relates to the field of food chemistry, in particular to a production method of starch octenyl succinate. Background technique [0002] Starch octenyl succinate generally exists in the form of sodium octenyl succinate (Starch Sodium Octenyl Succinates, SSOS), which is a highly safe emulsifying thickener. under mild alkaline conditions. This product was included in the category of food additives by the US Food and Drug Administration (FDA) in 1972, and it is currently the only starch alkenyl succinate product approved by the FDA as a food additive. [0003] Starch octenyl succinate has been approved for use by major countries in the world including China, and its quality index is that when producing food-grade starch octenyl succinate, the maximum allowable treatment amount of octenyl succinic anhydride is 3% , the degree of substitution is not more than 0.02, and the residual amount of octenylsuccinic acid is less than 0.3%. [0004] T...

AI Technical Summary

Problems solved by technology

[0017] CN1903883A discloses a method for preparing pregelatinized octenyl succinic acid starch, by pregelatinizing the pre-prepared octenyl succinic acid waxy starch at 100-200°C to obtain high-viscosity, high water-soluble products, but there is basically no innovation in its preparation process

[0018] CN1962696A discloses a preparation method of octenyl succinic acid starch ester, the patent only proposes to use potato starch instead of commonly used waxy corn starch to prepare starch ester, and there is no substantial breakthrough in the whole preparation process

This method is somewhat different from the classic wet process, but there are disadvantages such as difficult control of the esterification process, uneven substitution and high residual free sodium octenyl succinate

[0023] Also have the report about organic solvent method to prepare octenyl succinic acid starch ester in addition, starch and octenyl succinic anhydride are finished reaction in organic solvents such as benzene, acetone, dimethyl alum, but this method is due to the limitation of organic solvent Existing but obviously not suitable for the preparation of starch octenyl succinate products used in the food industry

Images