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Cation exchange membrane and preparation method thereof

A technology of cation exchange membrane and membrane liquid, applied in the field of cation exchange membrane and its preparation

Active Publication Date: 2018-05-25
SHANDONG TIANWEI MEMBRANE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inventors of this patent also found that allyloxybenzenesulfonic acid type monomers or substituted allyloxybenzenesulfonic acid type monomers have not been used in the preparation of cation exchange membranes

Method used

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  • Cation exchange membrane and preparation method thereof
  • Cation exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Synthesis of intermediates:

[0027] Add 15.12g (0.28mol) sodium methoxide to a dry four-necked flask, and add 88ml methanol to dissolve it completely; put 54.88g (0.28mol) sodium p-hydroxybenzenesulfonate dissolved in 400ml methanol into the dropping funnel 1 solution, the dropping funnel 2 was filled with 38.72g (0.32mol) 3-bromopropene; at room temperature, the liquid in the two dropping funnels was slowly added dropwise to the methanol solution of sodium methoxide. ℃, reflux reaction for 4 hours; after the solution is cooled, filter to remove insoluble matter and impurities, distill methanol under reduced pressure, add a small amount of water to the flask to dissolve the solid, cool to 0°C, recrystallize and dry to obtain a white solid powder.

[0028] (2) Monomer synthesis:

[0029] Weigh 15.81g (0.067mol) of the above white solid powder and 7.4g of N-methylpyrrolidone into a dry four-neck flask, stir, add 8.7g (0.075mol) of pyridine hydrochloride, heat up to ...

Embodiment 2

[0038] (1) Synthesis of intermediates:

[0039] Add 15.12g (0.28mol) sodium methoxide to a dry four-necked flask, and add 88ml methanol to dissolve it completely; put 54.88g (0.28mol) sodium p-hydroxybenzenesulfonate dissolved in 400ml methanol into the dropping funnel 1 solution, the dropping funnel 2 was filled with 38.72g (0.32mol) 3-bromopropene; at room temperature, the liquid in the two dropping funnels was slowly added dropwise to the methanol solution of sodium methoxide. ℃, reflux reaction for 4 hours; after the solution is cooled, filter to remove insoluble matter and impurities, distill methanol under reduced pressure, add a small amount of water to the flask to dissolve the solid, cool to 0°C, recrystallize and dry to obtain a white solid powder.

[0040] (2) Monomer synthesis:

[0041] Weigh 14.16g (0.06mol) of the above white solid powder and 11g of N-methylpyrrolidone into a dry four-neck flask, stir, add 7.8g (0.068mol) of pyridine hydrochloride, raise the tem...

Embodiment 3

[0050] (1) Synthesis of intermediates:

[0051] Add 15.12g (0.28mol) sodium methoxide to a dry four-necked flask, and add 88ml methanol to dissolve it completely; put 54.88g (0.28mol) sodium p-hydroxybenzenesulfonate dissolved in 400ml methanol into the dropping funnel 1 solution, the dropping funnel 2 was filled with 33.88g (0.28mol) 3-bromopropene; at room temperature, the liquid in the two dropping funnels was slowly added dropwise to the methanol solution of sodium methoxide. ℃, reflux for 3 hours; after the solution is cooled, remove insoluble matter and impurities by filtration, distill methanol under reduced pressure, add a small amount of water to the flask to dissolve the solid, cool to 0°C, recrystallize and dry to obtain a white solid powder.

[0052] (2) Monomer synthesis:

[0053] Weigh 15.81g (0.067mol) of the above white solid powder and 7.4g of N-methylpyrrolidone into a dry four-neck flask, stir, add 7.77g (0.067mol) of pyridine hydrochloride, heat up to 85°C...

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Abstract

The invention relates to a cation exchange membrane and a preparation method thereof. The cation exchange membrane is characterized in that the membrane has a semi-interpenetrating network structure and uses a microporous membrane as the support material, membrane pores are filled with functional polymer, and the functional polymer has a structure formed by the polymerization of allyloxy pyridinebenzene sulfonate or alkyl allyloxy pyridine benzene sulfonate. The preparation method includes the steps of firstly, performing monomer preparation, to be more specific, allowing sodium 4-hydroxybenzenesulfonate to have reaction with 3-halogenated propylene or 3-halogenated-2-alkyl propylene, and allowing the acquired product to have reaction with pyridine hydrochloride to obtain a monomer solution; secondly, forming the membrane, to be more specific, mixing the monomer solution with a crosslinking agent, an initiator and comonomer to form membrane making liquid, filling the membrane making liquid into the pores of the microporous membrane support material, and heating to perform polymerization reaction to obtain the cation exchange membrane. The cation exchange membrane is applicable toelectrodialysis.

Description

technical field [0001] The invention relates to a cation exchange membrane and a preparation method thereof, in particular to a cation exchange membrane with a semi-interpenetrating network structure, a microporous membrane as a supporting material, and a functional polymer filled in the pores of the membrane and a preparation method thereof. The material contains a structure formed by polymerization of allyloxybenzene sulfonate pyridinium salt or alkyl allyloxybenzene sulfonate pyridinium salt, and the membrane is suitable for electrodialysis process. Background technique [0002] Ion exchange membranes can be divided into anion exchange membranes (referred to as negative membranes) and cation exchange membranes (positive membranes). The polymer skeleton of the membrane is negatively charged, usually sulfonic acid groups, which can selectively pass through cations and block the passage of anions. The electrodialysis process takes the ion exchange membrane as the core, the ...

Claims

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Application Information

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IPC IPC(8): B01D61/48B01D67/00B01D71/72C08F216/14C08F212/36C08F220/20C08F220/06
CPCB01D61/485B01D69/125B01D71/72C08F216/14C08F216/1491C08F212/36C08F220/20C08F220/06
Inventor 傅荣强李晓玉王丹连文玉娄玉峰刘兆明
Owner SHANDONG TIANWEI MEMBRANE TECH
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