Method for preparing cold-water-soluble starch by virtue of dry process
A technology of cold water and starch, which is applied in the field of dry method to prepare cold water soluble starch, which can solve the problems of high temperature and high pressure, and achieve the effect of simple operation method and good stability
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Embodiment 1
[0034] The proportioning of each reactant in the described preparation method is as follows:
[0035]
[0036] And follow the steps below:
[0037] (1) take NaOH by above quality and add deionized water to be mixed with NaOH solution; Take sodium hypochlorite by above quality and add deionized water to be mixed with sodium hypochlorite solution;
[0038] (2) First raise the temperature of the kneader to 30°C, add 300g of cornstarch after the temperature stabilizes, turn on the stirring device and adjust the speed to 50r / min, then add ethanol, NaOH solution and sodium hypochlorite solution respectively, and add citric acid 45 minutes before the reaction ends , total reaction time 8h; Discharge, get thick product;
[0039] (3) Wash the crude product in ethanol to remove impurity ions and unreacted monomers, and then put it in an oven at 70-80°C to dry, and ensure that the water content of the system is ≤14%;
[0040] (4) Finally, the dried product is pulverized by a pulveri...
Embodiment 2
[0042] The proportioning of each reactant in the described preparation method is as follows:
[0043]
[0044] And follow the steps below:
[0045] (1) Weigh NaOH by the above mass and add deionized water to prepare NaOH solution; weigh H by the above mass 2 o 2 Add deionized water to make H 2 o 2 solution;
[0046] (2) First raise the temperature of the kneader to 80°C, add 300g of tapioca starch after the temperature is stable, turn on the stirring device and adjust the speed to 10r / min, then add ethanol, NaOH solution and H 2 o 2 Solution, acetic acid was added 15 minutes before the end of the reaction, and the total reaction time was 3 hours; the material was discharged to obtain a crude product;
[0047] (3) Wash the crude product in ethanol to remove impurity ions and unreacted monomers, and then put it in an oven at 70-80°C to dry, and ensure that the water content of the system is ≤14%;
[0048] (4) Finally, the dried product is pulverized by a pulverizer and...
Embodiment 3
[0050] The proportioning of each reactant in the described preparation method is as follows:
[0051]
[0052] And follow the steps below:
[0053] (1) Take NaOH by the above quality and add deionized water to be mixed with NaOH solution; Take urea by the above quality and add deionized water to be mixed with urea solution;
[0054](2) First heat up the kneader to 45°C, add 300g of potato starch after the temperature stabilizes, turn on the stirring device and adjust the speed to 30r / min, add ethanol, NaOH solution and urea solution respectively, and add hydrochloric acid 30 minutes before the end of the reaction, The total reaction time is 4h; the material is discharged to obtain a crude product;
[0055] (3) Wash the crude product in ethanol to remove impurity ions and unreacted monomers, and then put it in an oven at 70-80°C to dry, and ensure that the water content of the system is ≤14%;
[0056] (4) Finally, the dried product is pulverized by a pulverizer and passed ...
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