A kind of medium strong base styrene series amphoteric ion exchange resin and preparation method thereof

A technology of amphoteric ion and exchange resin, which is applied in the fields of amphoteric ion exchange resin and its preparation, medium and strong base styrene series amphoteric ion exchange resin and its preparation, and can solve the problems of poor electric regeneration effect of strong acid and strong alkali mixed resin, etc. Achieve good adsorption performance, expand the application range, and improve the performance of electric regeneration

Active Publication Date: 2021-10-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the above-mentioned problems in the MFEDI technology, the invention provides a kind of medium-strong basic polystyrene series amphoteric ion exchange resin and preparation method thereof, and described this resin is used to solve the strong-acid-strong-base mixed resin existing in the background technology The problem of poor electric regeneration effect

Method used

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  • A kind of medium strong base styrene series amphoteric ion exchange resin and preparation method thereof
  • A kind of medium strong base styrene series amphoteric ion exchange resin and preparation method thereof
  • A kind of medium strong base styrene series amphoteric ion exchange resin and preparation method thereof

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Effect test

Embodiment 1

[0026] A kind of strong base polystyrene series amphoteric ion exchange resin, the raw material composition and content of its weight part are as follows:

[0027]

[0028]

[0029] The preparation method of above-mentioned medium-strongly basic polystyrene series amphoteric ion exchange resin specifically comprises the steps:

[0030] (1) Sulfonation reaction and transformation of cross-linked polystyrene resin

[0031] Add 20 parts of cross-linked polystyrene resin, 20 parts of 1,2-dichloroethane, and 40 parts of concentrated sulfuric acid into the reaction vessel in sequence. The temperature is controlled at 40-60°C, the speed is 900r / min, and the reaction time is 30- After 40min, the reaction solution was filtered after the reaction, and the obtained cross-linked polystyrene resin was washed with 5% aqueous sodium hydroxide solution and 5% aqueous hydrochloric acid solution successively, and then washed with deionized water until the pH of the effluent was 7. Vacuum...

Embodiment 2

[0038] A kind of strong base polystyrene series amphoteric ion exchange resin, the raw material composition and content of its weight part are as follows:

[0039]

[0040]

[0041] The preparation method of above-mentioned medium-strong base series polystyrene series amphoteric ion exchange resin specifically comprises the steps:

[0042] (1) Sulfonation reaction and transformation of cross-linked polystyrene resin

[0043]Add 25 parts of cross-linked polystyrene resin, 50 parts of 1,2-dichloroethane, and 50 parts of concentrated sulfuric acid into the reaction vessel in sequence. The temperature is controlled at 40-60°C, the rotation speed is 900r / min, and the reaction time is 30- After 40min, the reaction solution was filtered after the reaction, and the obtained cross-linked polystyrene resin was washed with 5% aqueous sodium hydroxide solution and 5% aqueous hydrochloric acid solution successively, and then washed with deionized water until the pH of the effluent wa...

Embodiment 3

[0050] A kind of strong base polystyrene series amphoteric ion exchange resin, the raw material composition and content of its weight part are as follows:

[0051]

[0052] The preparation method of above-mentioned medium-strong base series polystyrene series amphoteric ion exchange resin specifically comprises the steps:

[0053] (1) Sulfonation reaction and transformation of cross-linked polystyrene resin

[0054] Add 30 parts of cross-linked polystyrene resin, 60 parts of 1,2-dichloroethane, and 60 parts of concentrated sulfuric acid into the reaction vessel in sequence. The temperature is controlled at 40-60°C, the speed is 900r / min, and the reaction time is 30- After 40min, the reaction solution was filtered after the reaction, and the obtained cross-linked polystyrene resin was washed with 5% aqueous sodium hydroxide solution and 5% aqueous hydrochloric acid solution successively, and then washed with deionized water until the pH of the effluent was 7. Vacuum drying ...

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Abstract

The invention discloses a medium-strong basic polystyrene amphoteric ion exchange resin and a preparation method thereof. Add cross-linked polystyrene resin, 1,2-dichloroethane, and concentrated sulfuric acid to the reactor in order by weight, stir and react, then filter, wash, transform and dry sodium chloride aqueous solution, and obtain sodium-form sulfonate Acid-based cross-linked polystyrene resin; the above-mentioned resin, chloroform, trioxane, trimethylchlorosilane, and anhydrous tin tetrachloride are added to the reactor in sequence to carry out chloromethylation reaction, and end After filtering, washing and drying, light brown chloromethyl-sulfonic acid cross-linked polystyrene resin is obtained; finally, amination reaction is carried out to obtain light yellow medium-strong basic polystyrene amphoteric ion exchange resin. The invention avoids environmental pollution and production safety problems in the traditional process of chloromethylation and obtains an amphoteric resin with good electrical regeneration performance, which 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 belongs to the field of polymer chemistry, and relates to an amphoteric ion exchange resin and a preparation method thereof, in particular to a medium-strong basic styrene-based amphoteric ion exchange resin and a preparation method thereof. Background technique [0002] Membraneless Electrodeionization (MFEDI) is a brand-new electric regenerative ion exchange method. This method uses DC high-voltage power supply to regenerate ion exchange resin. It does not need to use any chemicals or ion exchange membrane. It has a structure Simple, convenient operation, environment-friendly, reliable operation and other outstanding advantages. Among them, the ion exchange resin is a polymer functional material that selectively permeates ions. It is the core of the MFEDI device, and its performance has a significant impact on the operation of the MFEDI device. [0003] Previous research results have shown that strong acid and strong base mixed resins ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F8/32C08F8/24C08F8/36C08F112/08B01J43/00
CPCB01J43/00C08F8/24C08F8/32C08F8/36C08F112/08
Inventor 陈雪明邓世俊张雪娇金华长於洋
Owner ZHEJIANG UNIV
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