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Bipolar ion exchange sheet and manufacturing method therefor

A technology of ion exchange and cation exchange, applied in bipolar ion exchange plate and its manufacturing field, can solve the problems of water splitting efficiency drop, high membrane resistance, low ion selectivity, etc., achieve improved regeneration efficiency, low membrane resistance, increase ion The effect of swap capacity

Inactive Publication Date: 2017-08-01
COWAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bipolar ion exchange plates have good ion adsorption characteristics, but have low ion selectivity and high membrane resistance, which makes water splitting efficiency drop

Method used

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  • Bipolar ion exchange sheet and manufacturing method therefor
  • Bipolar ion exchange sheet and manufacturing method therefor
  • Bipolar ion exchange sheet and manufacturing method therefor

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0088] Manufacturing example 1: Manufacturing of porous cation adsorption plate

[0089] To fabricate porous cation adsorption sheets, cation exchange resin (Trilite CMP28, Samyang Corporation) was pulverized with an air jet mill (model name: NETSCH-CONDUX, NETSCH Corporation) at a rotation speed of 1,700 RPM to A cation exchange resin powder having an average particle diameter of 2.5 μm (maximum 10.2 μm) was prepared.

[0090] The mixture was produced by using 40 wt% LLDPE powder with an average particle size of 400 [mu]m to 60 wt% cation exchange resin powder using a ball mill. At this point, the LLDPE and cation exchange resin powders were mixed for 24 hours using zirconium balls and polyethylene (plastic) jars.

[0091] The porous cation adsorption plate was manufactured in the following manner: a stainless steel spacer (spacer) with a 20cm x 20cm internal space and a thickness of 200 μm was placed between two stainless steel plates with a size of 25cm x 25cm, and 6g wa...

manufacture example 2

[0092] Manufacturing example 2: Manufacturing of porous anion adsorption plate

[0093] In order to fabricate porous anion adsorption sheets, anion exchange resin (Trilite AMP28, Samyang Corporation) was pulverized with an air jet mill (model name: NETSCH-CONDUX, NETSCH Corporation) at a rotation speed of 1,700 RPM to Anion exchange resin powder having an average particle diameter of 3.7 μm (maximum 13.1 μm) was prepared.

[0094] The mixture was produced by using 40 wt% LLDPE powder with an average particle size of 400 [mu]m to 60 wt% anion exchange resin powder using a ball mill. At this point, the LLDPE and anion exchange resin powders were mixed for 24 hours using zirconium balls and polyethylene (plastic) jars.

[0095] A porous anion adsorption plate was fabricated by placing stainless steel spacers (spacers) with an inner space of 20 cm x 20 cm and a thickness of 200 μm between two stainless steel plates of size 25 cm x 25 cm, and distributing 6 g evenly between the ...

manufacture example 3

[0096] Manufacturing example 3: Formation of a cation exchange coating on a porous cation adsorption plate

[0097] Based on 100 parts by weight of polyetheretherketone (PEEK) (450PF, Dict, South Korea), PEEK was dissolved in 10 parts by weight of sulfuric acid (98%) in a round-bottomed four-neck flask, and then at 80 ° C under a nitrogen atmosphere, The sulfonation reaction was carried out for 24 hours while stirring, resulting in the precipitation of the polymer at -5°C with the addition of distilled water.

[0098] The cation exchange resin formed by sulfonated PEEK was manufactured by repeating three times the following process: drying the precipitated polymer in a vacuum oven at 80 °C, dissolving the precipitated polymer in dimethylacetamide (DMAc), and The precipitated polymer was reprecipitated in methanol to remove residual sulfuric acid, and the obtained precipitated polymer was dried.

[0099] A 20 wt% solids cation exchange coating solution was made by adding dry...

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Abstract

The present invention relates to a bipolar ion exchange sheet and a manufacturing method therefor, the bipolar ion exchange sheet comprising: a cation exchange film comprising a cation adsorption sheet and a cation exchange coating layer formed on one side of the cation adsorption sheet; and an anion exchange film comprising an anion adsorption sheet and an anion exchange coating layer formed on one side of the anion adsorption sheet, wherein the cation exchange film and the anion exchange film are bonded so that the cation exchange coating layer and the anion exchange coating layer face each other.

Description

technical field [0001] The invention relates to a bipolar ion exchange plate and its manufacturing method. Background technique [0002] In separating ionic materials, an ion exchange membrane is a separation membrane that uses mass transfer momentum as an electromotive force for separating ionic materials. When the cation exchange membrane system supplies electric current through the anode and the cathode, the cations contained in the electrolyte solution move through the ion exchange membrane to the cathode, and the anions cannot permeate through the ion exchange membrane through the Donnan rejection of the cation exchange membrane. Similarly, an anion exchange membrane system enables anions contained in an electrolyte solution to move through the ion exchange membrane toward the anode, and prevents cations from passing through the ion exchange membrane through Donnan's repulsion of the anion exchange membrane. In this way, the ionic material is separated. [0003] In th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J47/12
CPCB01J47/12B01D61/463B01D71/52B01D69/1216B01D71/261B01D71/5223B01J35/45B01J47/016B01J35/23B01D61/445B01D69/02B01D2325/10B01D2325/24B01D2325/42B01J23/745B01J37/0215B01J37/0236B01J39/04B01J39/18B01J41/04B01J41/12C02F1/4618C02F1/4693C02F2201/46115
Inventor 文诚敏李俊永崔顺范姜尚贤姜炅硕孙元根
Owner COWAY CO LTD
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