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Two-dimensional covalent organic framework modified ion exchange resin as well as preparation method and application thereof

An ion exchange resin, covalent organic framework technology, applied in chemical instruments and methods, inorganic chemistry, other chemical processes, etc., can solve the problems of difficult recycling, low utilization efficiency, secondary pollution, etc., to improve adsorption performance, The effect of increasing specific surface area and promoting adsorption

Active Publication Date: 2020-06-23
NANJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In view of the advantages of covalent organic frameworks for the enrichment of target substances and the disadvantages of low utilization efficiency and difficult recycling caused by easy agglomeration in water treatment, ion exchange resins have a good basis for practical application and their adsorption capacity has still been greatly improved. Space, the two-dimensional covalent organic framework is modified onto the ion exchange resin by the alternating deposition method, and the adsorption capacity and selectivity of the composite material to the target pollutants are significantly improved, and the covalent organic framework is easy to agglomerate and powder in practical applications. Loss leads to a series of problems such as secondary pollution

Method used

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  • Two-dimensional covalent organic framework modified ion exchange resin as well as preparation method and application thereof
  • Two-dimensional covalent organic framework modified ion exchange resin as well as preparation method and application thereof
  • Two-dimensional covalent organic framework modified ion exchange resin as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0050] The preparation of the two-dimensional covalent organic framework modified ion exchange resin of the present invention comprises the following steps:

[0051] (1) Equipped with solution A containing 1,3,5-trimesoyl chloride and solution B containing benzidine, specifically mixed according to the mass ratio of 1,3,5-trimesoyl chloride to ethyl acetate at 1:250 Dissolve evenly, mix and dissolve evenly according to the mass ratio of benzidine and ethyl acetate as 4:213.

[0052] (2) Add ion exchange resin D201 into ethyl acetate (the mass ratio of resin to ethyl acetate is 1:10) and soak for 12 hours for pretreatment, then filter out the resin.

[0053] (3) Transfer the pretreated resin to solution A (the mass ratio of resin to solution A is 1:15) at 40°C, carry out magnetic stirring (magnet speed is 200r / min) and react for 60min, filter it out, and use Rinse three times with ethyl acetate.

[0054] (4) Add the resin rinsed in step (3) to solution B (the mass ratio of so...

Embodiment 2

[0060] The preparation of the two-dimensional covalent organic framework modified ion exchange resin of the present invention comprises the following steps:

[0061] (1) Equip solution A containing 1,3,5-trimesoyl chloride and solution B containing benzidine, specifically mix and dissolve evenly according to the mass ratio of 1,3,5-trimesoyl chloride to toluene at 1:100 , mix and dissolve evenly according to the mass ratio of benzidine to toluene of 4:25.

[0062] (2) Add ion exchange resin D201 into toluene (the mass ratio of resin to toluene is 1:18) and soak for 12 hours for pretreatment, then filter out the resin.

[0063] (3) Transfer the pretreated resin to solution A (the mass ratio of resin to solution A is 1:24) at 48°C, carry out magnetic stirring (magnet speed is 200r / min) and react for 35min, filter it out, and use Rinse three times with toluene.

[0064] (4) Add the resin rinsed in step (3) to solution B (the mass ratio of solution A to solution B is 1:1) at 48°...

Embodiment 3

[0070] The preparation of the two-dimensional covalent organic framework modified ion exchange resin of the present invention comprises the following steps:

[0071] (1) Equip solution A containing 1,3,5-trimesoyl chloride and solution B containing benzidine, specifically, the mass ratio of 1,3,5-trimesoyl chloride to dichloroethane is 1:25 Mix and dissolve evenly, according to the mass ratio of benzidine and dichloroethane as 4:255, mix and dissolve evenly.

[0072] (2) Add ion exchange resin D201 into dichloroethane (the mass ratio of resin to dichloroethane is 1:25) and soak for 12 hours for pretreatment, then filter out the resin.

[0073] (3) Transfer the pretreated resin to solution A (the mass ratio of resin to solution A is 1:30) at 60°C, carry out magnetic stirring (magnet speed is 200r / min) and react for 20min, filter it out, and use Rinse three times with dichloroethane.

[0074] (4) Add the resin rinsed in step (3) to solution B (the mass ratio of solution A to s...

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Abstract

The invention discloses a two-dimensional covalent organic framework modified ion exchange resin, and a preparation method and an application thereof in water treatment. The preparation method comprises the following steps: pretreating ion exchange resin, putting the pretreated ion exchange resin into a ligand solution of 1, 3, 5-trimesoyl chloride for reaction, taking out the reaction product after the reaction is finished, putting the reaction product into a ligand solution of benzidine for the reaction, repeating the reaction process for multiple times, taking out the resin, washing and drying to obtain the product. The obtained two-dimensional covalent organic framework modified ion exchange resin has a remarkable adsorption effect on phenolic compounds in a water body in the field ofwater treatment. The two-dimensional covalent organic framework is modified on the ion exchange resin for complementation, the defects of the material can be overcome, the adsorption performance of the material can be improved, and the material has certain practical value and application prospect in the field of water treatment.

Description

technical field [0001] The invention relates to a two-dimensional covalent organic framework modified ion exchange resin and its preparation method and application, belonging to the technical field of water treatment adsorption materials. Background technique [0002] The control of organic pollutants has always been one of the hotspots of global concern in water environment governance. The scope and toxicity of organic pollutants are also increasing, seriously affecting the ecological environment and human health. The high toxicity and persistence of phenolic pollutants cause direct damage to the ecosystem, and the pollution of water sources threatens the safety of human drinking water. Phenolic pollutants have been proven to be typical human endocrine disruptors. They can enter the body through the respiratory tract, skin contact, etc., resulting in loss of liver and other organ functions. The frequent detection of phenolic compounds in wastewater has aroused public concer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/34
CPCB01J20/265B01J20/226B01J20/28095B01J20/28004C02F1/285C02F2101/345
Inventor 杨朕杨维本张毅张泽朋
Owner NANJING NORMAL UNIVERSITY
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