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Preparation method of anion exchange resin for sewage treatment

An exchange resin and sewage treatment technology, which is applied in anion exchange, ion exchange, water/sewage treatment, etc., can solve the problems of high cost, small exchange capacity, time-consuming and laborious, etc., and achieve simple operation, uniform and suitable pore size, and improved exchange rate. The effect of capacity

Inactive Publication Date: 2017-11-07
ANHUI WANDONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the exchange capacity of the currently produced polystyrene exchange resin is small, which cannot meet the demand for exchange capacity in the sewage treatment process, and requires frequent replacement, which is time-consuming, laborious, and costly.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of sewage treatment anion exchange resin preparation method that the present invention proposes comprises the following steps:

[0020] S1. Add formaldehyde dropwise to water glass under stirring state, adjust the pH value of the system to 8-8.8, heat up and stir, add urea, heat up and stir, add melamine, lauryl amidopropyl betaine and continue stirring, add water to mix and stir, drop Add copper sulfate solution, continue to stir after the dropwise addition is complete, use sodium hydroxide to adjust the pH of the system to 8-8.4, add ascorbic acid solution to stir, centrifuge, wash, and dry to obtain the first prefabricated material;

[0021] S2. Send the macroporous chloromethylated polystyrene resin into N,N dimethylformamide for swelling, add alcohol amine compound and the first preform, heat up and stir, cool down, and wash to obtain the second preform; In an ice-water bath, add thionyl chloride dropwise to the second prefabricated material, heat up, keep w...

Embodiment 2

[0024] A kind of sewage treatment anion exchange resin preparation method that the present invention proposes comprises the following steps:

[0025] S1. Add 30 parts of formaldehyde in parts by weight, and add 20 parts of water glass dropwise therein under stirring, adjust the pH value of the system to 8-8.8, stir at a temperature of 60°C for 50 minutes, add 4 parts of urea, and stir at a temperature of 88°C for 15 minutes. Add 4 parts of melamine and 2 parts of lauryl amidopropyl betaine and continue to stir for 12 minutes, add 30 parts of water and mix and stir for 8 hours, add 4 parts of copper sulfate solution with a concentration of 2.5wt% dropwise, continue stirring for 10 minutes after the addition is complete, and use sodium hydroxide Adjust the pH value of the system to 8-8.4, add 8 parts of 2% ascorbic acid solution and stir for 20 minutes, centrifuge, wash and dry to obtain the first prefabricated material;

[0026] S2, send 30 parts of macroporous chloromethylated...

Embodiment 3

[0029] A kind of sewage treatment anion exchange resin preparation method that the present invention proposes comprises the following steps:

[0030] S1. Add 50 parts of formaldehyde in parts by weight, and add 10 parts of water glass dropwise therein under stirring, adjust the pH value of the system to 8-8.8, stir at a temperature of 70°C for 40min, add 8 parts of urea, and stir at a temperature of 85°C for 25min. Add 2 parts of melamine and 4 parts of lauryl amidopropyl betaine and continue to stir for 6 minutes, add 50 parts of water and mix and stir for 4 hours, add 8 parts of copper sulfate solution with a concentration of 1.8wt% dropwise, continue stirring for 15 minutes after the addition is complete, and use sodium hydroxide Adjust the pH value of the system to 8-8.4, add 4 parts of 4% ascorbic acid solution and stir for 10 minutes, centrifuge, wash and dry to obtain the first prefabricated material;

[0031] S2, send 50 parts of macroporous chloromethylated polystyren...

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Abstract

The invention discloses a preparation method of an anion exchange resin for sewage treatment. The preparation method comprises: adding water glass to formaldehyde in a dropwise manner under a stirring state, adjusting the pH value of the system, carrying out heating stirring, adding urea, carrying out heating stirring, adding melamine and cocoamidopropylbetaine, continuously stirring, adding water, carrying out mixing stirring, adding a copper sulfate solution in a dropwise manner, continuously stirring after completing the adding, adjusting the pH value of the system by using sodium hydroxide, adding an ascorbic acid solution, stirring, carrying out centrifugal separation, washing, and drying to obtain a first preform; feeding a macroporous chloromethylated polystyrene resin into N,N dimethylformamide, swelling, adding an alcohol amine compound and the first preform, carrying out heating stirring, cooling, and washing to obtain a second preform; adding thionyl chloride to the second preform in a dropwise manner in an ice water bath, heating, carrying out thermal insulation, cooling, washing, and filtering to obtain a third preform; and feeding the third preform into isobutanol, swelling, adding tri(octyl-decyl)amine, and carrying out a reaction to obtain the anion exchange resin for sewage treatment.

Description

technical field [0001] The invention relates to the technical field of ion exchange resins, in particular to a method for preparing an anion exchange resin for sewage treatment. Background technique [0002] Anion exchange resins can be divided into strongly basic anion exchange resins and weakly basic anion exchange resins according to the nature of the exchange groups. Anion exchange resins have high strength, superior performance, and a wide range of uses, and can be used in the field of sewage treatment. However, the exchange capacity of the currently produced polystyrene exchange resin is small, which cannot meet the demand for exchange capacity in the sewage treatment process, and requires frequent replacement, which is time-consuming, laborious, and costly. Contents of the invention [0003] The invention proposes a method for preparing an anion exchange resin for sewage treatment. The obtained anion exchange resin for sewage treatment has a large exchange capacity,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J41/12B01J47/014C02F1/42C02F1/28
CPCB01J41/12B01J47/014C02F1/285C02F1/42C02F2001/422
Inventor 姚能平魏士明
Owner ANHUI WANDONG CHEM
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