Multifunctional fertilizer and pesticide slow/controlled releasing agent and its prepn process
A technology of multifunctional and controlled release agent, applied in the field of pesticide slow/controlled release agent and its preparation, multifunctional fertilizer, can solve the problems of inconvenient use of the final product, high production cost, complicated preparation process, etc., and achieve the production cost Low, high adsorption, easy to obtain the effect of raw materials
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Embodiment 1
[0038] Put 200 ml of acrylic acid into the reaction kettle, measure 250 ml of 26% sodium hydroxide solution, and add it to the reaction kettle to neutralize the acrylic acid.
[0039] The temperature of the neutralization liquid was cooled to 60°C, and 180 g of acrylamide was added and mixed. When the temperature is lowered to 35°C under stirring, 50 g of corn flour (40 mesh) and 30 g of bentonite (325 mesh) are added. Stir for 20 minutes, and after the dispersion is uniform, add 2 g of potassium persulfate, 2.5 g of polyethylene glycol (400), and 10 g of light magnesium carbonate in sequence. Keep the temperature of the reaction solution at 38℃, react for 40 minutes under stirring, then add 80ml of 20% ammonia water, and quickly put the reaction solution into the open reaction vessel. After 5-8 minutes, the reaction solution will react quickly. The reaction takes 7 minutes. It can be completed in about time.
[0040] After the reaction is completed, the obtained polymer is natura...
Embodiment 2
[0042] Put 300 ml of acrylic acid into the reaction kettle, measure 350 ml of 26% sodium hydroxide solution, and add it to the reaction kettle to neutralize the acrylic acid.
[0043] The temperature of the neutralization liquid was cooled to 60°C, and 260 g of acrylamide was added and mixed. When the temperature is lowered to 35°C under stirring, add 100 g of corn flour (60 mesh) and 60 g of bentonite (300 mesh). Stir for 20 minutes. After the dispersion is uniform, add 6 g of potassium persulfate, 5 g of polyethylene glycol (600), and 20 g of light magnesium carbonate. Keep the temperature of the reaction solution at 38° C., react for 40 minutes under stirring, then add 160 ml of 20% ammonia water, and quickly put the reaction solution into the open reaction vessel, and the reaction solution will react quickly.
[0044] After the reaction is completed, the obtained polymer is naturally cooled and then sliced, dried and crushed. The product drying temperature is 90-100℃, and the ...
Embodiment 3
[0046] Put 270 ml of acrylic acid into the reactor, measure 325 ml of 26% sodium hydroxide solution, and add it to the reactor to neutralize the acrylic acid.
[0047] The temperature of the neutralization liquid was cooled to 60°C, and 234 g of acrylamide was added and mixed. When the temperature is lowered to 35°C under stirring, 75 g of corn flour (50 mesh) and 40 g of bentonite (300 mesh) are added. Stir for 20 minutes, and after the dispersion is uniform, add 2.6 g of ammonium persulfate, 3.5 g of glycerol, and 15 g of light magnesium carbonate in sequence. Keep the temperature of the reaction solution at 38°C, react for 40 minutes with stirring, then add 110 ml of 20% ammonia water, and quickly put the reaction solution into the open reaction vessel, and the reaction solution will react quickly.
[0048] After the reaction is completed, the obtained polymer is sliced, dried and crushed after cooling. The product drying temperature is 90-100℃, and the drying time is 4.5 hours...
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