The invention provides a preparation method of
starch octenyl succinate, which aims to solve the problems that the existing preparation methods of
starch octenyl succinate have low production efficiency, long time, complicated process, severe environmental
pollution and the like. The preparation method sequentially comprises the following steps of: 1) preparing a
starch suspension; 2) adjusting the pH value of the starch suspension; 3) diluting octenyl
succinic anhydride; 4) adding diluted octenyl
succinic anhydride to the starch suspension; 5) adjusting the pH value of the
system; 6) rapidlyadding
emulsion to a soft packaging bag; 7) placing the soft packaging bag in ultrahigh-pressure equipment for pressurizing; 8) adjusting the pH value to 6.0-6.5; 9) washing away unreacted anhydride;and 10)
drying the product, pulverizing and screening to obtain the starch
octenyl succinate. The preparation method has the advantages of uniform reaction, simple production process, no environmental
pollution and low production cost; and by the preparation method, the reaction time is greatly shortened, the reaction time of the traditional water
phase method is shortened to 10-60 minutes from 6hours, and the production efficiency is greatly improved.