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Preparation method of spherical water absorption resin

A water-absorbent resin, spherical technology, applied in the field of water-absorbent resin preparation, can solve the problems of poor water-absorbent permeability, different product particle sizes, resin fragmentation, etc., and achieve the effects of low cost, simple process and simple production equipment

Inactive Publication Date: 2006-06-14
湖南省原子能农业应用研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the crushing is carried out under the action of mechanical friction or impact force, the resin is broken into irregular shapes, and the product has defects such as different particle sizes, fragility, unsightly appearance, and poor water absorption and permeability.

Method used

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  • Preparation method of spherical water absorption resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 15 kg of acrylic acid, add it into a stainless steel neutralization kettle with a jacket and a stirrer, fill the jacket with circulating water, slowly add 27% ammonia water (wherein the alkali is NH 3 Content is 3.25 kg), so that the neutralization temperature is controlled at 20 ° C, at this time PH = 6 ~ 7, then add 2.5 kg of acrylamide, cross-linking agent N, N, - methylene bisacrylamide 0.005 kg, after stirring and dissolving water box.

[0027] Start the shear emulsification mixer, add 13.5 kg of kerosene, 80.6 kg of Span, and 0.3 kg of monoglyceride into the dispersion medium, stir and mix and heat to 60-65°C to dissolve, then add the water phase to the oil phase, and stir After 1-2 hours, a reverse phase suspension was obtained. After putting the reverse phase suspension into the container, the temperature of the reverse phase suspension is controlled at 5°C and placed in 60 In the Co-γ-ray field, the dose rate is 0.05KGy / h, and the dose is 2KGy. No need ...

Embodiment 2

[0029] Weigh 25 kg of acrylic acid, add it into a stainless steel neutralization kettle with a jacket and agitator, fill the jacket with circulating water, configure 15.5 kg of potassium hydroxide into a 30% aqueous solution, slowly add it to the acrylic acid, and control the neutralization temperature At 20°C, when the pH is 6-7, add 2.5 kg of methacrylic acid and 0.05 kg of polyethylene glycol bis(meth)acrylate, stir and dissolve to form a water phase.

[0030] Start the shear emulsification mixer, add 15.5 kg of gasoline, 80, 9.5 kg of Span, and 0.6 kg of monoglyceride into it, stir and mix and heat to 60-65°C to dissolve, then add the water phase to the oil phase, and stir for 1-2 After 1 hour a reverse phase suspension was obtained. After filling the reverse phase 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 reverse phase suspension is controlled at 30°C, it is subjected to radiation a...

Embodiment 3

[0032] Weigh 26.25 kg of acrylic acid, add it to a stainless steel neutralization kettle with jacket and stirrer, fill the jacket with circulating water, configure 10.5 kg of sodium hydroxide into a 20.7% aqueous solution, slowly add it to acrylic acid, and control the neutralization temperature At 50°C, when the pH is 6-7, then add 1.5 kg of butyl acrylate and 0.025 kg of N,N,-methylenebisacrylamide, stir and dissolve to form an aqueous phase.

[0033] Start the shear emulsification mixer, add kerosene 20.5 kg, Span 80, 9.5 kg, and monoglyceride 0.25 kg, stir and mix and heat to 60-65°C to dissolve, then add the water phase to the oil phase, stir for 1-2 After 1 hour a reverse phase suspension was obtained. After filling the reverse phase 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 reverse phase suspension is controlled at 10°C, it is subjected to radiation and polymerized at rest, and the s...

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Abstract

The present invention discloses a preparation method of spherical water absorption resin. Said preparation method is characterized by including the following steps: using water phase acroleic acid, alkali liquor, copolymer monomer and cross-linking agent and oil phase Span 80, monoglyceride and dispersing agent to prepare reverse suspension liquor, then placing the reverse suspension liquor in a container, and placing said container in an irradiation field to receive irradiation, irradiation dose is 0.5-0.2X10 to the power 2, after the reaction is completed, separating out oil phase, drying so as to obtain the invented spherical water absorption resin.

Description

technical field [0001] The invention belongs to the preparation method of water-absorbing resin. Background technique [0002] Patent documents CN02123911.8 "Preparation method of superabsorbent resin", CN 200310107773.1 "Synthesis method of microwave irradiated cellulose-based superabsorbent resin", CN 200410101888.4 "A method of preparing superabsorbent resin by wave polymerization" and CN 200410101887.x "A method for preparing starch-grafted superabsorbent resin by wave polymerization" discloses a method for preparing a water-absorbent resin by using microwave radiation. They are all initiated by microwave radiation, and the polymerization method is solution polymerization. Patent document CN 02114782.5 "A method for preparing superabsorbent resin by irradiation method" discloses a method of using acrylic acid, acrylamide, hydroxypropyl acrylate, 2-acrylamide-2-methylpropanesulfonic acid, crosslinking agent , at a temperature of 25-35°C, cobalt with a radiation dose rate...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F2/14C08F220/10C08F220/56
Inventor 邵赛邓钢桥彭选明刘德林金龙新李青峰
Owner 湖南省原子能农业应用研究所
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