Preparation method of starch sulfonate
A technology of starch sulfonate and starch, which is applied in the fields of chemical industry and concrete building materials, can solve the problems of large slump loss and poor fluidity of concrete, and achieve good pumpability, temperature insensitivity, and process simple effect
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Embodiment 1
[0012] Embodiment 1: A kind of preparation method of starch sulfonate, the dextrin that directly buys is dissolved in water and water is used as dispersant and sodium bisulfite is used as sulfonating agent, after heating reaction, adjust pH value to be 7 with sodium hydroxide to obtain liquid Be starch sulfonate, comprise the steps:
[0013] Add 200 parts by mass of deionized water, 120 parts by mass of dextrin and 80 parts of sodium bisulfite into a three-necked flask, heat up to 75°C, keep the temperature for 2 hours, and adjust the pH to 7 with a NaOH solution with a mass percentage concentration of 35%. It is starch sulfonate, and after spray drying, it becomes powdery starch sulfonate.
Embodiment 2
[0014] Embodiment 2: A kind of preparation method of starch sulfonate, the dextrin prepared by starch is dissolved in water and water is used as dispersant and sodium bisulfite is used as sulfonating agent, after heating reaction, adjust pH value to 7 with sodium hydroxide to obtain liquid namely Be starch sulfonate, comprise the steps:
[0015] (1) Preparation of dextrin by enzymatic method: Prepare starch milk with a concentration of 30%, add 0.3 parts of amylase, control the temperature at 50°C, and react at a pH of 4.0. The reaction is terminated when the DE value is 10-20, and then 100°C Heat for 3 to 5 minutes to inactivate the enzyme;
[0016] (2) Add 220 parts by mass of deionized water, 100 parts by mass of dextrin and 100 parts of sodium bisulfite into a three-neck flask, raise the temperature to 95°C, keep it warm for 3 hours, and adjust the pH to 7 with a NaOH solution with a concentration of 35% by mass. The obtained liquid is starch sulfonate, which is powdery s...
Embodiment 3
[0017] Embodiment 3: A kind of preparation method of starch sulfonate, the dextrin prepared by starch is dissolved in water and water is used as dispersant and sodium bisulfite is used as sulfonating agent, after heating reaction, adjust pH value to 7 with sodium hydroxide to obtain liquid namely Be starch sulfonate, comprise the steps:
[0018] (1) Preparation of dextrin by enzymatic method: Prepare starch milk with a concentration of 45%, add 0.5 parts of amylase, control the temperature at 60°C, and react at a pH of 5.0. The reaction is terminated when the DE value is 10-20, and then 100°C Heat for 3 to 5 minutes to inactivate the enzyme;
[0019] (2) Add 140 parts by mass of deionized water, 70 parts by mass of dextrin and 50 parts of sodium bisulfite into a three-neck flask, raise the temperature to 85°C, keep it warm for 1 hour, and adjust the pH to 7 with a NaOH solution with a concentration of 35% by mass. The obtained liquid is starch sulfonate, which is powdery star...
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