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A kind of grafted quaternary ammonium cationic resin and preparation method thereof

A cationic resin and quaternary ammonium-based technology is applied in the field of grafted quaternary ammonium-based cationic resin and its preparation, which can solve the problems of poor electrical regeneration effect of strong acid and strong alkali mixed resin, and achieve the effect of improving electrical regeneration performance.

Active Publication Date: 2021-03-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of grafted quaternary ammonium cationic resin and preparation method thereof, overcome the problem of poor electric regeneration effect of strong acid and strong alkali mixed resin existing in MFEDI in the background technology

Method used

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  • A kind of grafted quaternary ammonium cationic resin and preparation method thereof
  • A kind of grafted quaternary ammonium cationic resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Introduction of quaternary ammonium groups in chloromethylated cross-linked polystyrene resin

[0039] 1.1) Add 15 parts of chloromethylated cross-linked polystyrene resin and 18 parts of trimethylamine hydrochloride to the reaction vessel in sequence;

[0040] 1.2) Add 72 parts of 20% sodium hydroxide aqueous solution dropwise to the reaction vessel within 1 hour, keep the reaction temperature at 30~40°C, and react for 2 hours under continuous stirring;

[0041] 1.3) After the reaction is completed, the reaction solution is filtered, transformed with 750 parts of 5% aqueous sodium hydroxide solution and 750 parts of 5% aqueous hydrochloric acid solution, and washed with 4500 parts of deionized water until the pH of the effluent is 7;

[0042] 1.4) drying at 60°C to obtain a chloromethylated cross-linked polystyrene resin with quaternary ammonium groups;

[0043] 2) Sulfonation of chloromethylated cross-linked polystyrene resins with quaternary ammonium groups

[0...

Embodiment 2

[0054] 1) Introduction of quaternary ammonium groups in chloromethylated cross-linked polystyrene resin

[0055] 1.1) Add 20 parts of chloromethylated cross-linked polystyrene resin and 20 parts of trimethylamine hydrochloride to the reaction vessel in sequence;

[0056] 1.2) Add 80 parts of 20% sodium hydroxide aqueous solution dropwise to the reaction vessel within 1 hour, keep the reaction temperature at 30~40°C, and react for 2 hours under continuous stirring;

[0057] 1.3) After the reaction is completed, the reaction solution is filtered, transformed with 1000 parts of 5% aqueous sodium hydroxide solution and 1000 parts of 5% hydrochloric acid aqueous solution, and washed with 6000 parts of deionized water until the pH of the effluent is 7;

[0058] 1.4) drying at 60°C to obtain a chloromethylated cross-linked polystyrene resin with quaternary ammonium groups;

[0059] 2) Sulfonation of chloromethylated cross-linked polystyrene resins with quaternary ammonium groups

...

Embodiment 3

[0070] 1) Introduction of quaternary ammonium groups in chloromethylated cross-linked polystyrene resin

[0071]1.1) Add 10 parts of chloromethylated cross-linked polystyrene resin and 5 parts of trimethylamine hydrochloride to the reaction vessel in sequence;

[0072] 1.2) Add 20 parts of 20% sodium hydroxide aqueous solution dropwise to the reaction vessel within 1 hour, keep the reaction temperature at 30~40°C, and react for 2 hours under continuous stirring;

[0073] 1.3) After the reaction is completed, the reaction solution is filtered, transformed with 500 parts of 5% aqueous sodium hydroxide solution and 500 parts of 5% aqueous hydrochloric acid solution, and washed with 3000 parts of deionized water until the pH of the effluent is 7;

[0074] 1.4) drying at 60°C to obtain a chloromethylated cross-linked polystyrene resin with quaternary ammonium groups;

[0075] 2) Sulfonation of chloromethylated cross-linked polystyrene resins with quaternary ammonium groups

[007...

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Abstract

The invention discloses a grafted quaternary ammonium cationic resin and a preparation method thereof. Add chloromethylated cross-linked polystyrene resin, trimethylamine hydrochloride, and 20% sodium hydroxide aqueous solution to the reactor in order by weight, keep the reactor at 30~40°C, react for 3 hours under stirring, filter and wash , and dry to obtain a resin with quaternary ammonium groups; add the resin, 1,2-dichloroethane, and silver sulfate to the reactor in sequence, raise the temperature to 50-60°C, add concentrated sulfuric acid, and fuming sulfuric acid, react for 1 hour, and heat up To 70~80°C, react for 1h, heat up to 115~125°C, react for 5h, cool to room temperature, dilute the reaction solution, filter, wash, and dry to obtain grafted quaternary ammonium-based cation resin. The resin obtained by the invention has good electrical regeneration performance and can be used for the preparation of high-purity water and the treatment of heavy metal wastewater in the membraneless electrodeionization technology.

Description

technical field [0001] The invention relates to an ion exchange resin and a preparation method thereof, in particular to a grafted quaternary ammonium cationic resin and a preparation method thereof. Background technique [0002] Membraneless electrodeionization (MFEDI) is a new deionization technology that uses ion exchange resin as a functional material, does not need to use any chemicals, does not need to use ion exchange membranes, and only uses direct current regeneration. It has high purification efficiency and environmental protection. Friendly, reliable operation and other outstanding advantages. The ion exchange resin is the core of the MFEDI device, and the characteristics of the resin have a significant impact on the operation of the MFEDI. [0003] Previous studies have shown that strong acid and strong base mixed resins have good electrical conductivity and deionization ability, but poor electrical regeneration effect. Constrained by the performance of the cur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/36C08F8/44C08F12/06B01J39/20B01J49/30C02F1/42
CPCC08F8/36B01J39/20B01J49/30C02F1/42C02F2001/425C08F8/44C08F12/06C02F1/4695C02F2101/20C08F8/30C08F112/16C08F257/02
Inventor 陈雪明张雪娇
Owner ZHEJIANG UNIV
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