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A kind of core-grade ion exchange resin-based core-shell structure composite material and preparation method thereof

A technology of ion exchange resins and composite materials, which is applied in the preparation of nuclear-grade ion-exchange resins, nuclear-grade ion-exchange resin-based core-shell structure composite materials and their preparation fields, which can solve the problems of poor chemical resistance and radiation stability, and achieve high surface Effects of purity, excellent radioactive exchange capacity, good chemical resistance and radiation stability

Active Publication Date: 2019-08-06
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this resin has poor chemical and radiation stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] At 25°C, dissolve 0.5g of cerium nitrate in 50mL of ethylene glycol, add 2.5g of ammonium thiosulfate, stir for 30min, transfer to a Teflon-lined reactor, react at 160°C for 40h, cool to room temperature, Wash the filter cake with 100mL of deionized water, dry it in vacuum at 80°C for 8h, transfer it to a muffle furnace, and roast it at 900°C for 5h to obtain rare earth oxides; weigh 50mL of isopropanol, add 0.2g of rare earth oxides, and disperse evenly by ultrasonic , add 0.2g KH551, transfer to a PTFE-lined reactor, react at 120°C for 36h, cool to room temperature naturally, wash the filter cake with 100mL of deionized water to obtain hydrophobic rare earth oxides;

[0027] At 25°C, weigh 40mL styrene, 5mL divinylbenzene, 1.5mL ethanol and 0.2g cyclohexanone peroxide, put them into the reactor and stir evenly, heat to 60°C, add 0.5g hydrophobic rare earth oxide, Ultrasonic dispersion for 0.5h, cooled to room temperature to obtain a composite oil phase reaction soluti...

Embodiment 2

[0031] At 25°C, dissolve 1.2g of lanthanum nitrate in 60mL of ethylene glycol, add 6.0g of ammonium thiosulfate, stir for 50min, transfer to a Teflon-lined reactor, react at 160°C for 50h, and cool to room temperature. Wash the filter cake with 550mL of deionized water, dry it in vacuum at 100°C for 8h, transfer it to a muffle furnace, and roast it at 1100°C for 4h to obtain rare earth oxides; weigh 100mL of isopropanol, add 0.8g of rare earth oxides, and disperse evenly by ultrasonic , add 0.8g KH171, transfer to a PTFE-lined reactor, react at 120°C for 24h, cool to room temperature naturally, wash the filter cake with 400mL of deionized water to obtain hydrophobic rare earth oxides;

[0032] At 25°C, weigh 80mL styrene, 16mL divinylbenzene, 4.4mL isopropanol and 1.2g diisobutyl peroxydicarbonate, put them into the reactor and stir evenly, heat to 90°C, add 4.5g hydrophobic Rare earth oxides were ultrasonically dispersed for 1.0 h, cooled to room temperature to obtain a compo...

Embodiment 3

[0036] At 25°C, dissolve 0.64g of praseodymium nitrate in 80mL of ethylene glycol, add 6.4g of ammonium thiosulfate, stir for 40min, transfer to a Teflon-lined reactor, react at 160°C for 48h, cool to room temperature, Wash the filter cake with 200mL of deionized water, dry it in vacuum at 80°C for 9h, transfer it to a muffle furnace, and roast it at 700°C for 12h to obtain rare earth oxides; weigh 125mL of isopropanol, add 1.0g of rare earth oxides, and disperse evenly by ultrasonic , add 0.6g KH172, transfer to a PTFE-lined reaction kettle, react at 120°C for 12h, cool to room temperature naturally, wash the filter cake with 300mL deionized water to obtain hydrophobic rare earth oxides;

[0037] At 25°C, weigh 100mL styrene, 20mL divinylbenzene, 3.5mL butanol and 0.8g dibenzoyl peroxide, put them into the reactor and stir evenly, heat to 75°C, add 2.8g hydrophobic rare earth oxide , ultrasonically dispersed for 1.5h, cooled to room temperature to obtain a composite oil phase...

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Abstract

The invention discloses a nuclear-grade ion exchange resin based core-shell-structure composite material and a preparation method thereof. The core-shell-structure composite material takes a rare earth oxide as a core and takes nuclear-grade strong-alkali anion exchange resin as a shell. The rare earth oxide refers to cerium oxide, lanthanum oxide or praseodymium oxide. The nuclear-grade strong-alkali anion exchange resin is made from styrene, divinyl benzene, pore-forming agents and initiators. The preparation method of the composite material includes preparing the rare earth oxide, adding the rare earth oxide into oil-phase mixed liquor comprising the styrene, the divinyl benzene, the pore-forming agents and the initiators, sequentially allowing polymerization, chloromethylation, amination and transformation reactions, and allowing the nuclear-grade strong-alkali anion exchange resin to grow on the surface of the rare earth oxide through polymerization. The obtained core-shell-structure composite material has extremely high surface purity, high radiation element exchange volume, and high chemical and radiation resisting stability, and can directly serve as a water treating agentin primary-circuit water circulating systems in the nuke industry.

Description

technical field [0001] The invention relates to a nuclear-grade ion-exchange resin-based core-shell structure composite material and a preparation method thereof, belonging to the preparation technology of nuclear-grade ion-exchange resin in the field of nuclear industry. Background technique [0002] Ion exchange technology is currently an important technology widely used in the chemical capacity control of the main circuit and auxiliary systems of nuclear power plants. The key lies in the preparation of nuclear-grade ion exchange resins with high surface purity, high exchange capacity, good chemical resistance and radiation stability. At present, the most commonly used ion exchange resins in the field of nuclear industry are strongly acidic or strongly basic ion exchange resins. However, due to the incomplete transformation of these ion exchange resins, there are some residual impurity ions inside the material, which is not conducive to the safe operation of the nuclear in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F212/08C08F212/36C08F2/38C08F8/00C08F8/30C08F8/24C08J9/28B01J41/14C02F1/42
CPCB01J41/14C02F1/42C02F2001/422C08F2/38C08F8/00C08F8/24C08F8/30C08F212/08C08J9/28C08J2325/08C08F212/36
Inventor 王章忠张泽武巴志新杭祖圣卜小海
Owner NANJING INST OF TECH
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