A kind of production method of modified cassava starch
A technology of starch and carboxymethyl cassava, which is applied in the production field of starch modification and modified cassava starch, which can solve the problems of incomplete alkalization process, increased side reactions, and uneven distribution, so as to improve the technical level and economic benefits , reduce the crystallization index, and enhance the effect of nucleophilic ability
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Embodiment 1
[0038] A kind of production method of modified cassava starch, comprises the following steps:
[0039] (1) Alkalization treatment: Add 100 parts by weight of tapioca starch, 60 parts by weight of sodium hydroxide and aqueous ethanol solution with a volume concentration of 90% into the mixer at the same time, stir evenly at a speed of 600r / min, and heat to 25 After keeping for 40 minutes at ℃, cool down to room temperature naturally, add to the hopper of a high-pressure homogenizer, stir at 60rpm to keep the material in suspension, then pass through the high-pressure homogenizer, circulate the material and gradually increase the pressure, and stop pressurization when the pressure reaches 100MPa; The ethanol aqueous solution add-on is 10 times of tapioca starch and sodium hydroxide gross weight;
[0040] (2) Etherification reaction: Add 40 parts by weight of chloroacetic acid to the high-pressure homogenizer, heat to 50°C, and keep for 110-130min for etherification reaction. Aft...
Embodiment 2
[0045] A kind of production method of modified cassava starch, comprises the following steps:
[0046] (1) Alkalization treatment: Add 120 parts by weight of tapioca starch, 70 parts by weight of sodium hydroxide and aqueous ethanol solution with a volume concentration of 92% into the mixer at the same time, stir evenly at a speed of 650r / min, and heat to 26 ℃, after keeping for 45min, cool down to room temperature naturally, add to the hopper of a high-pressure homogenizer, stir at 60rpm to keep the material in suspension, then pass through the high-pressure homogenizer, circulate the material and gradually increase the pressure, and stop pressurization when the pressure reaches 100MPa; The ethanol aqueous solution add-on is 10 times of tapioca starch and sodium hydroxide gross weight;
[0047] (2) Etherification reaction: Add 42 parts by weight of chloroacetic acid into the high-pressure homogenizer, heat to 52 °C, and keep for 115 minutes for etherification reaction. After ...
Embodiment 3
[0052] A kind of production method of modified cassava starch, comprises the following steps:
[0053] (1) Alkalization treatment: Add 140 parts by weight of tapioca starch, 80 parts by weight of sodium hydroxide and an aqueous ethanol solution with a volume concentration of 93% into the mixer, stir evenly at a speed of 700r / min, and heat to 27 ℃, keep it for 50 minutes, cool it down to room temperature naturally, add it into the hopper of a high-pressure homogenizer, stir at 60rpm to keep the material in suspension, then pass through the high-pressure homogenizer, circulate the material and gradually increase the pressure, and stop pressurization when the pressure reaches 100MPa; The ethanol aqueous solution add-on is 10 times of tapioca starch and sodium hydroxide gross weight;
[0054] (2) Etherification reaction: Add 45 parts by weight of chloroacetic acid into the high-pressure homogenizer, heat to 55 °C, and keep for 120 minutes for etherification reaction. After the eth...
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