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A kind of preparation technology of anode gasket for ion-exchange membrane electrolyzer

An ion-exchange membrane electrolyzer and its preparation technology are applied in the field of preparation of anode gaskets for ion-exchange membrane electrolyzers, which can solve problems such as reducing the overall service life of the electrolyzer, damaging the sealing effect of the rubber gasket, and increasing the maintenance cost of the electrolyzer. , to achieve the effect of enhancing elasticity, improving performance and optimizing effect

Active Publication Date: 2022-04-19
JIANGYIN ANCAN ELECTROCHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, rubber gaskets are usually used as anode gaskets, typically EPDM gaskets, and the existing EPDM gaskets have the following problems in use: due to the contact medium of the anode gaskets It is the electrolyte, and the part in contact with the electrolyte on the anode gasket is most likely to be corroded by the electrolyte, so that the sealing effect of the rubber gasket is damaged or the sealing reliability is reduced, while the existing EPDM rubber used as the anode gasket The corrosion resistance life of the gasket is generally short, thus reducing the overall service life of the electrolytic cell and increasing the maintenance cost of the electrolytic cell

Method used

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  • A kind of preparation technology of anode gasket for ion-exchange membrane electrolyzer
  • A kind of preparation technology of anode gasket for ion-exchange membrane electrolyzer
  • A kind of preparation technology of anode gasket for ion-exchange membrane electrolyzer

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Effect test

Embodiment 1

[0043] Such as Figures 1 to 4 Shown is an embodiment of the preparation process of an anode gasket for an ion-exchange membrane electrolyzer of the present invention, which successively includes a batching process, a mixing process, an extrusion molding process and a molding vulcanization process, wherein the batching process includes raw material mixing Ratio process steps, the raw material proportioning is carried out according to the following weight ratio: 100 parts of binary ethylene propylene rubber raw material, 85-90 parts of natural gas semi-reinforced carbon black raw material, 2.5-3.0 parts of molded flow aid, 2 parts of anti-aging agent ~5 parts, 2~5 parts of peroxide crosslinking agent, 3~5 parts of crosslinking auxiliary agent, 0.5~1.0 part of liquid polybutadiene; The mixing process includes using an internal mixer to carry out one stage of mixing, The process step of two-stage mixing; the extrusion molding process includes the process step of extruding the mixed...

Embodiment 2

[0068] Adopt some quantity of anode gaskets that are made by embodiment 1, carry out tensile strength, elongation at break and accelerated corrosion test respectively, and compare with the anode gaskets manufactured by conventional process, the results are as follows:

[0069] (1) Test results of tensile strength and elongation at break

[0070] Conventional Anode Gasket Anode gasket of the present invention Tensile strength MPa 9～12 10～14 Elongation at break% 270～300 280～320

[0071] (2) Accelerated corrosion test

[0072] 1. Test method: A number of anode gaskets prepared in Example 1 were used, soaked in the anode solution and cathode solution for a long time respectively, and the corrosion situation was observed regularly, and compared with the anode gaskets manufactured by conventional processes.

[0073] Wherein, the anode solution of the accelerated corrosion test is 5.2% NaClO solution, and the test temperature is normal temperature.

...

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Abstract

The invention relates to the technical field of electrolytic cells, which discloses a preparation process for an anode gasket for an ion-exchange membrane electrolytic cell, which sequentially includes a batching process, a mixing process, an extrusion molding process and a molding vulcanization process, and the batching process is as follows: Proportionate ingredients: 100 parts of binary ethylene propylene rubber raw material, 85-90 parts of natural gas semi-reinforced carbon black raw material, 2.5-3.0 parts of molded flow aid, 2-5 parts of anti-aging agent, 2-5 parts of peroxide crosslinking agent parts, 3 to 5 parts of crosslinking aids, and 0.5 to 1.0 parts of liquid polybutadiene; the mixing process includes using an internal mixer to carry out one-stage mixing and two-stage mixing successively; the extrusion molding process includes using The extruder extrudes the compounded compound into shape; the molding vulcanization process includes adding the extruded compound into a mold for molding, heating and vulcanization to make the anode gasket. The invention can improve the corrosion resistance of the anode gasket, prolong the overall service life of the electrolytic cell, and reduce the maintenance cost of the electrolytic cell.

Description

technical field [0001] The invention relates to the technical field of electrolytic cells, in particular to a preparation process of an anode gasket for an ion-exchange membrane electrolytic cell. Background technique [0002] Electrolyzers are widely used in the chlor-alkali industry. A typical electrolytic cell is an ionic membrane electrolytic cell. An anode gasket is arranged on the anode side of the ionic membrane electrolytic cell. The front of the anode gasket is in contact with the ionic membrane, and the back of the anode gasket is closely attached to the frame surface of the anode cell. superior. [0003] In the prior art, rubber gaskets are usually used as anode gaskets, typically EPDM gaskets, and the existing EPDM gaskets have the following problems in use: due to the contact medium of the anode gaskets It is the electrolyte, and the part in contact with the electrolyte on the anode gasket is most likely to be corroded by the electrolyte, so that the sealing e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L9/00C08K13/02C08K5/14C08K3/04C08J5/18C25B11/00C25B1/46
Inventor 凌龙军
Owner JIANGYIN ANCAN ELECTROCHEM EQUIP
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