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Preparation method of gel type strong-base anion exchange resin

An exchange resin, strong basic technology, applied in the field of ion exchange resin preparation, can solve the problems of not being widely used, not suitable for nitrate, low treatment efficiency, etc., achieve good development prospects and practical significance, and excellent physical and chemical properties , Strong adsorption effect

Inactive Publication Date: 2014-07-09
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Biological denitrification has low treatment efficiency for nitrate, especially for low-concentration nitrate, and there are hygienic risks. It is not suitable for treating nitrate in drinking water; methods such as chemical reduction, reverse osmosis and electrodialysis are expensive. Nor can it be widely applied; although the construction and operation costs of the ecological method are low, it is greatly affected by seasonal and natural environment changes, and it is difficult to obtain a stable treatment effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Aggregation:

[0028] (1) Preparation of the water phase: 860mL of 2.5% polyvinyl alcohol (PVA) solution, 215mL of gelatin solution with a mass fraction of 2%, 33g of tricalcium phosphate, 16g of sodium chloride, and a methylene blue solution with a mass fraction of 1‰ 33mL and 0.54g of EDTA-2Na were mixed evenly and set aside.

[0029] (2) Preparation of the oil phase: Mix 500mL of styrene, 37.5mL of divinylbenzene and 4.8g of benzoyl peroxide and set aside.

[0030] (3) Operation process: Add the water phase into a 2L reaction kettle with stirring, condenser, and thermometer. The stirring speed is 150r / min. When the water bath is heated to 60°C, add the prepared oil phase and increase the stirring speed to 200r / min. min, stir for 15 minutes, then raise the temperature to 75°C and keep it for 2h; then raise the temperature to 80°C and keep it for 1-2h; finally raise the temperature to 90°C-95°C and keep it for 4 hours.

[0031] After the reaction, filter through ...

Embodiment 2

[0043] (1) Aggregation:

[0044] (1) Preparation of the water phase: 900mL of 2.5% polyvinyl alcohol (PVA) solution, 225mL of gelatin solution with a mass fraction of 2%, 33.8g of tricalcium phosphate, 16.9g of sodium chloride, and methine with a mass fraction of 1‰ Mix 33.8mL of blue solution and 0.57g of EDTA-2Na evenly and set aside.

[0045] (2) Preparation of the oil phase: Mix 500mL of styrene, 62.5mL of divinylbenzene and 5.06g of benzoyl peroxide evenly for later use.

[0046] (3) Operation process: Add the water phase into a 2L reaction kettle with stirring, condenser, and thermometer. The stirring speed is 150r / min. When the water bath is heated to 60°C, add the prepared oil phase and increase the stirring speed to 200r / min. min, stir for 15 minutes, then raise the temperature to 75°C and keep it for 2h; then raise the temperature to 80°C and keep it for 1-2h; finally raise the temperature to 90°C-95°C and keep it for 4 hours.

[0047] After the reaction, filter th...

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Abstract

The invention discloses a preparation method of gel type strong-base styrene anion exchange resin. The gel type strong-base styrene anion exchange resin disclosed by the invention is prepared by taking styrene, divinyl benzene, benzoyl peroxide, polyvinyl alcohol, gelatin, methylene blue, dichloromethane, 1,4-dichloromethoxybutane, anhydrous stannic chloride and trimethylamine as main raw materials through suspension polymerization reaction, chloromethylation reaction and amination reaction. The preparation method disclosed by the invention comprises the following steps of carrying out suspension polymerization reaction to synthesize a styrene-divinyl benzene cross-linked polymer, carrying out chloromethylation reaction of the styrene-divinyl benzene cross-linked polymer, and carrying out amination reaction of a chloromethylated styrene-divinyl benzene cross-linked polymer. The particle size range of the resin prepared by the method is 0.5-1.5 mm; the resin has a good property of removing sulfate and nitrate, a relatively high regeneration rate and the like; various physicochemical properties of the resin are good. Therefore, the resin disclosed by the invention can be applied in the sulfate and nitrate removing treatment process of water, and has good development prospects and practical significance.

Description

technical field [0001] The invention belongs to the preparation technology of ion exchange resin, in particular to a preparation method of gel-type strongly basic styrene-based anion exchange resin. Background technique [0002] Water is the source of life and an important substance in organisms. Good water quality is of great significance to organisms and human health. Anions in water include carbonate ions, bicarbonate ions, sulfate ions, chloride ions, and nitrate ions, among which sulfate and nitrate are more harmful to the human body. [0003] In some areas in northern my country where groundwater is the main source of drinking water, especially in remote mountainous areas and rural areas, the sulfate content in groundwater is usually as high as 1000mg / L or more. Long-term consumption of these sulfate-laden groundwaters can lead to diarrhea, dehydration, and gastrointestinal disturbances. Therefore, how to reduce and remove the sulfate content in groundwater in these ...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F212/36C08F8/24C08F8/32B01J41/14
Inventor 任勇翔叶媛媛朱菁
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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