Acid-resistant high-mechanical-strength magnetic acrylic-series weak acid cation exchange microspherical resin and method of preparing same

A weak acid cation, mechanical strength technology, applied in the field of resin materials, can solve the problems of low mechanical strength, poor acid corrosion resistance, etc.

Active Publication Date: 2018-06-29
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an acid-resistant high mechanical strength magnetic acrylic weak acid cation exchange microsphere resin on the bas...

Method used

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  • Acid-resistant high-mechanical-strength magnetic acrylic-series weak acid cation exchange microspherical resin and method of preparing same
  • Acid-resistant high-mechanical-strength magnetic acrylic-series weak acid cation exchange microspherical resin and method of preparing same
  • Acid-resistant high-mechanical-strength magnetic acrylic-series weak acid cation exchange microspherical resin and method of preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Weigh 20g of Fe with a particle size of about 8nm to 300nm 3 o 4 Add it into 500mL methanol solution, stir for 30min, add 1g of silane coupling agent tetraethoxysilane, adjust the pH to 10-11, raise the temperature to 50°C, stir thoroughly for 30min, then add 1g of dimethyldiethoxysilane , adjust the pH to 10-11, fully stir at 50°C for 1 hour, filter to obtain magnetic powder particles with a silicon oxide layer-hydrophobic layer, and dry at 40°C until there is no moisture on the surface.

[0071]With the magnetic powder particles after this treatment and 80g methyl acrylate, 12.7g divinylbenzene, 7.3g ethylene glycol dimethacrylate, 0.6g azobisisobutyronitrile, 1.2g benzoyl peroxide, 30g cyclohexane Alcohol, 0.5g isopropyl dioleic acid acyloxy (dioctylphosphoryloxy) titanate mixed, fully stirred at 40 ℃ for 45 minutes, added to 500mL containing 0.5% hydroxyethyl cellulose, 5% Suspension polymerization was carried out in a 1L three-necked flask, and the stirring speed...

Embodiment 2

[0075] Weigh 20g of Fe with a particle size of about 8nm to 300nm 3 o 4 Add it into 500mL methanol solution, stir for 30min, add 1g of silane coupling agent tetraethoxysilane, adjust the pH to 10-11, raise the temperature to 50°C, stir thoroughly for 30min, then add 1g of dimethyldiethoxysilane , adjust the pH to 10-11, stir thoroughly at 50°C for 1 hour, add 1g of silane coupling agent tetraethoxysilane again, adjust the pH to 10-11, raise the temperature to 50°C, stir thoroughly for 30min, then add 1g of dimethyl Diethoxysilane, pH adjusted to 10-11, fully stirred at 50°C for 1 hour to obtain magnetic powder particles with silicon oxide layer-hydrophobic layer-silicon oxide layer-hydrophobic layer, and dried at 40°C until the surface has no moisture.

[0076] With the magnetic powder particles after this treatment and 80g methyl acrylate, 12.7g divinylbenzene, 7.3g ethylene glycol dimethacrylate, 0.6g azobisisobutyronitrile, 1.2g benzoyl peroxide, 30g cyclohexane Alcohol, ...

Embodiment 3

[0080] Weigh 30g of α-Fe with particle size less than 1μm 2 o 3 , γ-Fe 2 o 3 Add the mixture into 500mL of methanol solution, stir for 30min, add 2g of silane coupling agent tetramethoxysilane, adjust the pH to 10-11, raise the temperature to 50°C, stir thoroughly for 30min, then add 1g of n-propyltriethoxy Silane, adjust the pH to 10-11, stir thoroughly at 50°C for 1 hour, add 1g of silane coupling agent tetramethoxysilane again, adjust the pH to 10-11, raise the temperature to 50°C, stir thoroughly for 30min, then add 1g of methyl Trimethoxysilane, pH adjusted to 10-11, fully stirred at 50°C for 1 hour to obtain magnetic powder particles with silicon oxide layer-hydrophobic layer-silicon oxide layer-hydrophobic layer, and dried at 40°C until there is no moisture on the surface.

[0081] With the magnetic powder particles after this treatment and 80g methyl acrylate, 12.7g divinylbenzene, 7.3g ethylene glycol dimethacrylate, 0.6g azobisisobutyronitrile, 1.2g benzoyl peroxi...

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Abstract

The invention relates to the field of resin materials and particularly relates to acid-resistant high-mechanical-strength magnetic acrylic-series weak acid cation exchange microspherical resin and a method of preparing same. The method includes steps of: a) coating a magnetic material with a silane coupling agent, and performing blending polymerization to the magnetic particles, coated with a silicon oxide layer and a hydrophobic layer, with an organic monomer to prepare initial polymerized blank spheres; b) swelling the processed initial polymerized blank spheres in a secondary monomer phase,and dispersing the blank spheres in a water phase to perform secondary polymerization in order to prepare magnetic polymer microspheres having an interpenetrating polymer network structure; c) hydrolyzing the material to prepare the resin. The resin is 50-500 [mu]m in particle size, is 40-65% in transformation swelling rate and is not less than 80% in roundness after abrasion. The resin is 0.05-1.0% in iron dissolution quantity after being soaked in a 1 mol/L hydrochloric acid solution for 24 h. The resin can be used for separation or removal of heavy metal ions, ammonia nitrogen and other cation substances in waste water, drinking water or natural water bodies.

Description

technical field [0001] The invention belongs to the field of resin materials, and in particular relates to an acid-resistant high-mechanical-strength magnetic acrylic weak-acid cation-exchange microsphere resin. In addition, the invention also relates to a preparation method of the resin. Background technique [0002] Acrylic weak acid cation exchange resin has been widely used in water treatment, drug purification and material separation because of its high exchange capacity and good regeneration performance. The particle size of the traditional acrylic weak acid cation exchange resin is 0.3mm ~ 1.2mm, and the fixed bed process is often used in the application, so that the mass transfer resistance of the resin is large, the amount of treated water is low, and the operating cost is increased. If magnetic particles of small particle size are mixed into the powder resin ball to make the resin magnetic, it can not only solve the problem of resin separation, but also use the ful...

Claims

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Application Information

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IPC IPC(8): C08F292/00C08F220/14C08F212/36C08F285/00C08F2/20C08J9/28B01J39/20
CPCB01J39/20C08F2/20C08F285/00C08F292/00C08J9/28C08J2351/00
Inventor 李爱民李启蒙双陈冬周庆王正周伟伟
Owner NANJING UNIV
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