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Hydrophilic magnetic strong base anion exchange micro-sphere resin and preparation method thereof

A styrene-based, anionic technology, applied in the field of resin materials, can solve problems such as poor hydrophilicity of styrene resins

Active Publication Date: 2018-07-06
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of this invention is to provide a kind of hydrophilic magnetic styrene series strong base anion exchange microsphere resin on the basis of prior art, can solve the chloromethylation process in the synthetic process of styrene series strong base anion exchange resin A strong acid environment will corrode the magnetic particles in the skeleton, and the problem of poor hydrophilicity of styrene resin

Method used

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  • Hydrophilic magnetic strong base anion exchange micro-sphere resin and preparation method thereof
  • Hydrophilic magnetic strong base anion exchange micro-sphere resin and preparation method thereof
  • Hydrophilic magnetic strong base anion exchange micro-sphere resin and preparation method thereof

Examples

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Effect test

Embodiment 1

[0080] Weigh 20g Fe with a particle size of 8nm~300nm 3 O 4 With 80g 4-acetoxystyrene, 12.7g divinylbenzene, 7.3g ethylene glycol dimethacrylate, 0.6g azobisisobutyronitrile, 1.2g benzoyl peroxide, 30g cyclohexanol, 0.5g Mix isopropyl tris(dioctylphosphoryloxy) titanate coupling agent, stir well at 40°C for 45 minutes, and add to 500mL aqueous phase containing 0.5% hydroxyethyl cellulose and 5% sodium sulfate The solution was subjected to suspension polymerization in a 1L three-necked flask, and the stirring speed was controlled at 260rpm. Gradually raise the temperature to 80°C within 2h, keep it at this temperature for 8h, cool to room temperature, wash and dry with pure water and ethanol many times to obtain polyacetoxystyrene magnetic white balls. Add the polymerized white ball to 5 times the weight of 20% sodium hydroxide solution, stir and hydrolyze at 80°C for 4 hours, separate to obtain the resin ball, stabilize in the acidic solution of pH 3 to 4 for 2 hours, wash with...

Embodiment 2

[0084] Weigh 20g of α-Fe with a particle size of about 1μm 2 O 3 And γ-Fe 2 O 3 Mixture with 80g 4-acetoxystyrene, 12.7g divinylbenzene, 7.3g ethylene glycol dimethacrylate, 0.6g azobisisobutyronitrile, 1.2g benzoyl peroxide, 30g cyclohexanol, Mix 0.5g of vinyl trimethoxysilane coupling agent, stir well at 40°C for 45 minutes, add to 500mL aqueous solution containing 0.5% hydroxyethyl cellulose and 5% sodium sulfate, in a 1L three-necked flask For suspension polymerization, the stirring speed was controlled at 260 rpm. Gradually raise the temperature to 80°C within 2h, keep it at this temperature for 8h, cool to room temperature, wash and dry with pure water and ethanol many times to obtain polyacetoxystyrene magnetic white balls. Add the polymerized white ball to 5 times the weight of 20% sodium hydroxide solution, stir and hydrolyze at 80°C for 4 hours, separate to obtain the resin ball, stabilize in the acidic solution of pH 3 to 4 for 2 hours, wash with methanol and water a...

Embodiment 3

[0088] Weigh 20g of α-Fe with a particle size of about 1μm 2 O 3 And γ-Fe 2 O 3 Mixture with 80g 4-acetoxystyrene, 12.7g divinylbenzene, 7.3g allyl itaconic acid, 0.6g azobisisobutyronitrile, 1.2g benzoyl peroxide, 70g toluene, 0.3g isopropyl Dioleic acid acyloxy (dioctylphosphoryloxy) titanate coupling agent is mixed, fully stirred at 40 ℃ for 45 minutes, added to 500mL containing 0.5% hydroxyethyl cellulose, 5% sodium sulfate Suspension polymerization reaction was carried out in a 1L three-necked flask, and the stirring speed was controlled at 260rpm. Gradually raise the temperature to 80°C within 2h, keep it at this temperature for 8h, cool to room temperature, wash and dry with pure water and ethanol many times to obtain polyacetoxystyrene magnetic white balls. The dipolymerized white ball was added to 4 times the weight of 10% sodium hydroxide solution, stirred and hydrolyzed at 80°C for 6 hours, separated to obtain the resin ball, stabilized in the acid solution of pH 3 t...

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Abstract

The invention relates to a hydrophilic magnetic strong base anion exchange micro-sphere resin and a preparation method thereof and belongs to the field of resin materials. The preparation method comprises the following steps: carrying out a suspension polymerization reaction between magnetic granules and organic monomers so as to obtain hydroxylation or acyloxy styrene series copolymerized magnetic microspheres; hydrolyzing the acyloxy styrene series magnetic microspheres so as to obtain hydroxylation styrene magnetic microspheres; further carrying out a Mannich reaction among the resin whitespheres, secondary amine and aldehyde to introduce a tertiary amine structure, and introducing two tertiary amine groups into each benzene ring so as to greatly increase the exchange capacity of a resin; further carrying out an alkylation reaction of the aminated resin, thereby obtaining the resin provided by the invention. Because the resin is excellent in magnetism and settleability, a fluidizedbed adsorption process can be carried out, the treatment water capacity can be greatly increased, and the resin can be applied to separation or removal of negative electric substances such as humic acid, fulvic acid and inorganic anions in various types of wastewater, drinking water or natural water bodies.

Description

Technical field [0001] The invention belongs to the field of resin materials, and specifically relates to a hydrophilic magnetic styrene series strong base anion exchange microsphere resin. In addition, the invention also relates to a preparation method of the resin. Background technique [0002] The styrene-based strong base anion exchange resin is an anion exchange resin with a hydrophobic styrene skeleton, high mechanical strength and high exchange capacity. It is widely used in biomedical engineering, chemical analysis, wastewater treatment and resource utilization. However, the particle size of traditional styrene-based strong base anion exchange resins is mostly between 0.3mm and 1.2mm. The fixed bed process is often used in application, which makes the resin have high mass transfer resistance and low water treatment during application, which increases the operation. cost. Because the small particle resin has a larger external specific surface area and excellent dynamic pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F292/00C08F212/14C08F212/36C08F222/14C08F2/20C08F8/12C08F8/32C08F8/02C08J9/28B01J41/14
CPCC08F2/20C08F8/02C08F8/12C08F8/32C08F292/00B01J41/13C08J2351/00C08F222/102C08F212/14
Inventor 李爱民李启蒙双陈冬周庆王正周伟伟
Owner NANJING UNIV
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