Nuclear-grade ion-exchange resin-based composite material and preparation method thereof

An ion exchange resin and composite material technology, which is applied in the preparation and application of water treatment agents, composite materials with high-efficiency ion adsorption and catalytic exchange removal performance, nuclear-grade ion exchange resin-based composite materials and their preparation fields, and can solve the problem of circulating water. Pollution, unfavorable stable operation of nuclear power plants, loss of platinum particles, etc., to prevent particle loss, improve removal and purification efficiency and recycling capacity, and enhance the effect of bonding

Active Publication Date: 2017-06-13
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are currently literature and patent reports on the construction of ion-exchange resin-based composite materials with platinum loaded on ion-exchange resins, in these composite materials, platinum ions are directly loaded on ion-exchange resins through ion exchange, which has been used in practical applications. The loss of platinum particles is easy to occur in the medium, causing the pollution of circulating water, which is not good for the stable operation of nuclear power plants

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] At 25°C, add 6 mL of 0.5 wt% potassium chloroplatinate aqueous solution into the reactor, add 30 mL of 0.005 g / mL polyvinylpyrrolidone aqueous solution, stir for 2 hours, add 150 mL of 0.1 wt% lemon Trisodium acid aqueous solution, heated to 100°C, stirred for 4 hours, and centrifuged to obtain 0.75g of platinum sol;

[0026] At 25°C, add 150mL of ethanol and 30mL of deionized water to the above-prepared platinum sol, and ultrasonically disperse for 1 hour to obtain a platinum sol ethanol-water mixture. Adjust the pH of the mixture to 8.5 with 0.1g / mL sodium hydroxide solution. Add 1.8g tetraethyl orthosilicate and 0.9g sodium metaaluminate to the mixture in turn, react at 120°C for 26h, cool down to room temperature and filter, wash the filter cake with 100mL deionized water and 20mL ethanol successively, and wash the filter cake at 65°C Vacuum-dried for 10 h, placed in a tube furnace at 550 ° C for 4 h to obtain a platinum-silicon-aluminum molecular sieve composite. ...

Embodiment 2

[0030] At 25°C, add 4mL of potassium chloroplatinate aqueous solution with a mass fraction of 1.0wt% into the reaction kettle, add 16mL of cetyltrimethylammonium bromide aqueous solution with a concentration of 0.02g / mL, stir for 4h, add 160mL of mass The sodium borohydride aqueous solution with a fraction of 0.2wt% was heated to 30°C, stirred and reacted for 2 hours, and centrifuged to obtain 0.95g of platinum sol;

[0031] At 25°C, add 300mL of ethanol and 50mL of deionized water to the above-prepared platinum sol, and ultrasonically disperse for 2 hours to obtain a platinum sol ethanol-water mixture. Adjust the pH of the mixture to 10 with 0.2g / mL sodium hydroxide solution. Add 3.5g of hexamethyldisiloxane and 3.0g of sodium metaaluminate to the mixture in turn, react at 140°C for 48h, cool down to room temperature and filter, wash the filter cake with 200mL of deionized water and 50mL of ethanol in sequence, Dry it under vacuum for 8 hours, place it in a tube furnace and b...

Embodiment 3

[0035] At 25°C, add 4mL of potassium chloroplatinite aqueous solution with a mass fraction of 1.5wt% into the reaction kettle, add 10mL of cetyltrimethylammonium bromide aqueous solution with a concentration of 0.04g / mL, stir for 5h, and add 120mL The sodium borohydride aqueous solution with a mass fraction of 0.5wt% was heated to 50°C, stirred and reacted for 6h, and centrifuged to obtain 1.55g of platinum sol;

[0036] At 25°C, add 180mL of ethanol and 20mL of deionized water to the above-prepared platinum sol, and disperse ultrasonically for 1.5h to obtain a platinum sol ethanol-water mixture. Use 0.08g / mL ammonia solution to adjust the pH of the mixture to 10, and then Add 3.0g tetraethyl orthosilicate and 1.8g aluminum isopropoxide to the mixture, react at 160°C for 84h, cool down to room temperature and filter, wash the filter cake with 250mL deionized water and 60mL ethanol in turn, and vacuum at 85°C Dry for 8.5 hours, place in a tube furnace and bake at 600°C for 5.5 ...

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Abstract

The invention discloses a nuclear-grade ion-exchange resin-based composite material and a preparation method thereof. The composite material is prepared by the steps: firstly reducing a platinum precursor into polymer-packaged nano platinum particles by using a reducing agent in existence of a polymer packaging agent; adding a silicon source and an aluminum source and then carrying out hydrothermal reaction employing a polymer as a structure-directing agent to obtain a platinum-silicon aluminum molecular sieve core-shell structure compound, wherein the inner core is nano platinum particles and the shell layer is a silicon-aluminum molecular sieve; and finally assembling the platinum-silicon aluminum molecular sieve core-shell structure compound to nuclear-grade ion-exchange resin to obtain the nuclear-grade ion-exchange resin-based composite material. The composite material has relatively high ion exchange property, relatively high catalytic removal efficiency, relatively high environment durability and extremely high recycling property, and has a good application prospect in the field of nuclear industry circulating water treatment.

Description

technical field [0001] The invention relates to a nuclear-grade ion-exchange resin-based composite material and a preparation method thereof, which is a composite material suitable for high-efficiency ion adsorption and catalytic exchange removal performance of a nuclear power plant loop water treatment system, and belongs to water treatment in the technical field of water treatment Agent preparation and application technology. Background technique [0002] With the development of nuclear power technology, the scale of nuclear power construction is also increasing. While this technology supplies humans with a large amount of energy, it also produces a huge amount of radioactive liquid. If these radionuclides are directly discharged into the environment, they will inevitably cause environmental pollution and even lead to ecological damage. [0003] Currently, the common treatment method for these radionuclides is ion exchange separation using ion exchange resins. The excha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/08B01J35/10B01J39/20B01J41/14B01J43/00C02F1/42
CPCB01J31/08B01J35/10B01J39/20B01J41/14B01J43/00C02F1/42C02F2101/006
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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