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Quaternary ammonium base type functionalized silica gel material and application thereof in water purification

A functionalized, quaternary ammonium base technology, applied in the directions of alkali metal oxides/hydroxides, alkali metal compounds, inorganic chemistry, etc., can solve the problems of increasing core flow resistance, accidents, reducing heat transfer efficiency, etc. The effect of high rate, long service life and large exchange capacity

Pending Publication Date: 2022-02-15
苏州硒诺唯新新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The long-term accumulation of these corrosion products will reduce the heat transfer efficiency, increase the flow resistance of the core, and may even cause partial blockage of the flow channel, causing serious accidents
In addition, when the corrosion products dissolved or suspended in the coolant pass through the core or core deposits, they can also be activated by neutrons to generate radioactivity, which poses a radiation threat to the shutdown maintenance and overhaul of the reactor system
[0006] At present, there is no report on the quaternary ammonium base type anion exchange material that can be applied above 80°C. Therefore, an anion exchange material with high temperature resistance and long service life has been developed to replace the existing water purification resin material. Thermal power, nuclear power , The purification system of each circuit of the pressurized water reactor of the marine nuclear power plant has important safety and economic significance

Method used

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  • Quaternary ammonium base type functionalized silica gel material and application thereof in water purification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Diethylenetriamine (0.4mol) and 3-(3-chloropropyl)thiopropyltrimethoxysilane (0.4mol) were added to a 500mL three-neck flask equipped with a glass stopper and a condensation reflux device and refluxed at 130°C for 2.5 After h, cool to 60°C, add methanol (40mL) and reflux for 1 hour, after cooling, put in a mixed solution of xylene (125ml) and spherical silica gel (90g, 300-500μm), reflux at 130°C for 4h, cool and filter After washing with ethanol for 5 times and drying, add the product into a 500mL three-necked flask containing 100ml of iodomethane, add 20g of sodium bicarbonate and stir at 80°C for 6h, filter, wash with ethanol for 5 times and dry, add the product into 200ml of absolute ethanol Add 30g of sodium ethylate and stir at 60°C for 2 hours, filter and wash with ethanol twice, then wash with deionized water for five times and dry to obtain the compound formula I, where x=3, y=3, z=2, GBT5760-2000 Hydroxygen type anion exchange resin exchange capacity determina...

Embodiment 2

[0033] Add polyethylene (0.4mol) and 3-(3-chloropropyl)thiopropyltrimethoxysilane (0.4mol) to a 500mL three-neck flask equipped with a glass stopper and a condensing reflux device, and reflux at 150°C for 2.5h Cool to 70°C, add methanol (40mL) and reflux for 1 hour, after cooling, put in a mixed solution of xylene (125ml) and spherical silica gel (90g, 200-500μm), reflux at 150°C for 2h, and then add 3-mercapto Propyltrimethoxysilane (0.2 mol) was then heated for 5 hours and then cooled. After filtering and washing with ethanol for 5 times and drying, add the product to a 500mL three-necked flask containing 300ml of epoxypropyl chloride, add 40g of sodium bicarbonate and stir at 100°C for 8h, filter and wash with ethanol for 5 times and dry, add the product to a 250ml In absolute ethanol, add 50g of sodium methoxide and stir at 80°C for 4h, filter and wash with ethanol for 2 times, then wash with deionized water for 5 times and dry to obtain compound formula I, where x=3, y= ...

Embodiment 3

[0035] The anion purification column of the condensate purification simulation system of a thermal power plant is filled with the silica gel material of Example 1, and the water at the water inlet contains Cl - 2.669ppm, SO 4 2- 0.521ppm, SiO 3 2- 0.834ppm, F - 1.087ppm, 100°C condensed water flows through the purification column filled with the material in Example 1, and the water quality test at the outlet after 6 months of collection, the concentration of each anion in the water is as follows: Cl - 0.045ppm, SO 4 2- 0.011ppm, SiO 3 2- 0.013ppm, F - 0.042ppm.

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Abstract

The invention discloses a quaternary ammonium base type functionalized silica gel material and application thereof in water purification. According to the quaternary ammonium base type functionalized silica gel material, quaternary ammonium groups are loaded on silica gel by utilizing an amino quaternization mechanism, and an alkaline reagent reacts under a certain condition to obtain the quaternary ammonium base type functionalized silica gel material. The multi-quaternary ammonium base type functionalized silica gel material provided by the invention is high in loading rate, large in exchange capacity, capable of reducing low-concentration anions in water to ppb level, long in service life, capable of tolerating a high temperature of 100 DEG C for up to 6 months, and free of any pollution to water quality after long-time use.

Description

technical field [0001] The invention relates to the technical field of organic chemistry, and relates to a quaternary ammonium base type functionalized silica gel material and its application in water purification. [0002] technical background [0003] In thermal power, nuclear power, marine nuclear power plants, and ultrapure water purification systems, the traditional technology mixed bed resin (H + -OH - type) to remove salts in water, quaternary ammonium base resins are widely used as anion resins in mixed bed resins because of their strong anion exchange capacity. [0004] The commonly used quaternary ammonium base type ion exchange resin is to use styrene-divinylbenzene copolymer pellets to obtain chlorine balls after chloromethylation reaction, and then carry out ammoniation reaction with organic amine to obtain quaternary ammonium base type anion exchange resin, but the quaternary ammonium base type anion exchange resin Ammonium bases are unstable under certain hea...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30C02F1/28C02F103/04
CPCB01J20/103B01J20/28019B01J20/28011C02F1/281C02F2103/04
Inventor 杨南超杨晓伟张婷向亚雄
Owner 苏州硒诺唯新新材料科技有限公司