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Selective strong-base anion exchange resin and preparation method thereof

A technology for exchanging resins and anions, which is applied in anion exchange, ion exchange, chemical instruments and methods, etc. It can solve the problems of undiscovered selective strong base anion exchange resins, achieve excellent kinetic performance and selectivity, and simple operation , good mechanical strength

Inactive Publication Date: 2013-09-18
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The result of literature search shows: before the present invention is accomplished, do not find the report that adopts the tertiary amine with different alkyl chain lengths as functionalization reagent to synthesize selective strong base anion exchange resin

Method used

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  • Selective strong-base anion exchange resin and preparation method thereof
  • Selective strong-base anion exchange resin and preparation method thereof
  • Selective strong-base anion exchange resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In a 500mL three-neck flask, add 20g of chlorine balls with a cross-linking degree of 8%, add 60g of benzene, and swell at room temperature for 12h; remove the swelling solution, weigh 60g of N,N-dimethyloctylamine and dissolve in 60mL of ethanol-water solution , add dropwise to the flask at room temperature and mix with chlorine balls, and stir while adding; at 40°C, stir and react for 8 hours; filter out the resin, wash with water, dilute hydrochloric acid solution, and water successively, extract with absolute ethanol, and hot air Drying can make strong base exchange capacity be the selective strong base anion exchange resin of 2.86mmol / g, and its structural unit is as follows:

[0022]

Embodiment 2

[0024] In a 500mL three-neck flask, add 20g of chlorine spheres with a cross-linking degree of 8%, add 60g of nitrobenzene, and swell at room temperature for 12h; remove the swelling solution, weigh 40g of N,N-dimethylbutylamine, dissolve in 40mL of ethanol - In the aqueous solution, add it dropwise to the flask at room temperature and mix with chlorine balls, and stir while adding; at 60°C, stir and react for 10 hours; filter out the resin, wash it with water, dilute hydrochloric acid solution, and water successively, and extract it with absolute ethanol Mention, hot air drying can make strong base exchange capacity be the selective strong base anion exchange resin of 3.57mmol / g, and its structural unit is as follows:

[0025]

Embodiment 3

[0027] In a 500mL three-neck flask, add 10g of chlorine balls with a cross-linking degree of 2%, add 30g of dichloroethane, and swell at room temperature for 24h; remove the swelling solution, weigh 100g of N,N-dimethylpropylamine, dissolve in 100mL of ethanol - into the aqueous solution, drop it into the flask at room temperature and mix it with chlorine balls, and stir while adding it; at 60°C, stir for 24 hours; filter out the resin, wash it with water, dilute hydrochloric acid solution, and water successively, and extract it with absolute ethanol , hot air drying can make a strong base exchange capacity of 4.65mmol / g selective strong base anion exchange resin, its structural unit is as follows:

[0028]

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Abstract

The invention relates to selective strong-base anion exchange resin and a preparation method thereof. The selective strong-base anion exchange resin comprises the following basic structural unit, wherein R1 is alkyl with at most 3 carbon chains, R2 is alkyl with 3-18 carbon chains. The strong-base exchange capacity of the resin is 0.8-4.65 mmol / g, and the resin is synthesized through the following steps of: (1) sufficiently swelling a chloromethylation styrene-divinylbenzene copolymer, namely a chlorine ball, by utilizing an inert organic solvent, and filtering the chlorine ball; (2) mixing tertiary amine with alkyl chains in different lengths as an amination reagent with the chlorine ball, and stirring for amination reaction; and (3) filtering, extracting and drying to obtain the selective strong-base anion exchange resin.

Description

technical field [0001] The invention relates to an anion exchange resin and a preparation method thereof, in particular to a selective strong base anion exchange resin and a preparation method thereof. Background technique [0002] In recent years, harmful inorganic anions such as NO 3 － , NO 2 － , ClO 4 - , BrO 4 - , IO 4 - 、HAsO 3 － 、CN - , CNO - 、H 2 PO 4 - 、HS - , TcO 4 － Water pollution caused by water pollution has become an increasingly serious global environmental problem. The uncontrolled discharge of urban and industrial wastewater, the operation of septic tanks, food processing, and medical industries are all major sources of inorganic toxic anions in the water environment. Ion exchange method is widely used to remove inorganic anions in water, but there are often many competing anions in polluted water, especially SO 4 2- The coexistence of anions with high valence states will cause serious competitive adsorption, which will lead to a signif...

Claims

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Application Information

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IPC IPC(8): B01J41/14C08F212/08C08F212/36C08F8/44
Inventor 孙越程言妍段锦涛徐柯张发立
Owner SOUTHEAST UNIV
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