Predextrinization acetate starch and its preparation method
A technology of acetate starch and pregelatinization, applied in the field of pregelatinization acetate starch and its preparation, can solve the problems of poor rehydration of finished products, poor transparency of paste liquid, complicated process, etc., and achieves good product application effect and production The effect of low cost and wide source of raw materials
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Embodiment 1
[0026] First, add 100 kg of potato or tapioca starch and 180 kg of water into the reactor to form a 20-23Be starch slurry, stir continuously, add a sodium hydroxide solution with a mass concentration of 3-3.8% to the reactor to adjust the pH value to 7.5, and add acetic anhydride 4.5 kg, keep the temperature at 20±1°C to make it react, continuously add dropwise sodium hydroxide solution with a mass concentration of 3-3.8% during the reaction, maintain the pH value at 8.5, continue to react for 1 hour after adding acetic anhydride, add Mass concentration is 8-10% hydrochloric acid solution and pH value 6.0-7.0, adds 200 kilograms of water washings, sedimentation in the kettle, washes again in the same way, to remove impurity (sodium chloride or other chemical residues), the preparation To obtain the primary product of acetate starch, adjust the primary product into starch milk with a mass concentration of 20%, carry out pregelatinization at a drum temperature of 170° C., pulveri...
Embodiment 2
[0028] The steps are the same as in Example 1, except that the pH value of the esterification process is maintained at 8.0, and the reaction temperature is maintained at 20±1°C.
Embodiment 3
[0030] The steps are the same as in Example 1, except that the pH value of the esterification process is maintained at 8.5, and the reaction temperature is maintained at 20±1°C.
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