Preparation method of spherical water absorption resin
A water-absorbing resin, spherical technology, applied in the field of preparation of water-absorbing resin, can solve the problems of poor water absorption and permeability, different particle sizes of products, resin fragmentation, etc., and achieve the effect of low cost, simple process and simple production equipment
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Embodiment 1
[0026] Weigh 15 kg of acrylic acid and add it to a stainless steel neutralization kettle with a jacket and agitator. The jacket is filled with circulating water. Slowly add 27% ammonia water (of which alkali is NH 3 The content is 3.25 kg), the neutralization temperature is controlled at 20°C, at this time PH=6~7, then 2.5 kg of acrylamide and crosslinking agent N,N,-methylene bisacrylamide 0.005 kg are added. After stirring and dissolving, water box.
[0027] Start the shear emulsification mixer, add 13.5 kg of dispersing medium kerosene, 80, 6 kg of Span, 0.3 kg of monoglyceride, stir and mix and heat to 60~65℃ to dissolve, then add the water phase to the oil phase and stir After 1 to 2 hours, a reversed-phase suspension is obtained. After filling the reversed-phase suspension in the container, the temperature of the reversed-phase suspension is controlled at 5℃ and placed 60 In the Co-γ-ray field, the dose rate is 0.05KGy / h, and the dose is 2KGy. It does not need to be stirred....
Embodiment 2
[0029] Weigh 25 kg of acrylic acid and add it to a stainless steel neutralization kettle with a jacket and agitator. The jacket is filled with circulating water, and 15.5 kg of potassium hydroxide is configured into a 30% aqueous solution. Slowly add acrylic acid to control the neutralization temperature. At 20°C, pH=6-7 at this time, then add 2.5 kg of methacrylic acid and 0.05 kg of polyethylene glycol bis(meth)acrylate, stir and dissolve into the water phase.
[0030] Start the shearing emulsification mixer, add 15.5 kg gasoline, 9.5 kg Span 80, 9.5 kg monoglyceride into it, stir and mix and heat to 60~65℃ to dissolve, then add the water phase to the oil phase and stir for 1~2 After hours, a reversed-phase suspension was obtained. After filling the inverted suspension into the container, place 60 In the Co-γ ray field, the dose rate is 0.05KGy / h, the dose is 3KGy, the temperature of the inverse suspension is controlled at 30℃, and it is allowed to stand and polymerize under rad...
Embodiment 3
[0032] Weigh 26.25 kg of acrylic acid and add it to a stainless steel neutralization kettle with a jacket and agitator. The jacket is filled with circulating water, and 10.5 kg of sodium hydroxide is configured into a 20.7% aqueous solution. Slowly add acrylic acid to control the neutralization temperature. At 50°C, pH=6-7 at this time, then add 1.5 kg of butyl acrylate and 0.025 kg of N,N,-methylene bisacrylamide, stir and dissolve into the water phase.
[0033] Start the shear emulsification mixer, add 20.5 kg of kerosene, 9.5 kg of Span 80, 0.25 kg of monoglyceride to it, stir and mix and heat to 60~65℃ to dissolve, then add the water phase to the oil phase and stir for 1~2 After hours, a reversed-phase suspension was obtained. After filling the inverted suspension into the container, place 60 In the Co-γ ray field, the dose rate is 1KGy / h, the dose is 3kGy, the temperature of the reversed-phase suspension is controlled at 10°C, and it is allowed to stand and polymerize under r...
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