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Electrolytic cell diaphragm for chlor-alkali industry and preparation method thereof

A chlor-alkali industry and electrolytic cell technology, applied in the field of ion exchange membranes, can solve problems such as increased membrane resistance and increased cell pressure, and achieve the effects of reducing adhesion, reducing cell voltage, and reducing energy consumption

Inactive Publication Date: 2020-04-28
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dense inorganic oxides without ion conductivity and fluorine-containing particles will increase the membrane resistance, thereby increasing the cell pressure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Perfluorosulfonic acid resin with IEC=1.08mmol / g and perfluorocarboxylic acid resin with IEC=0.98mmol / g are combined into perfluoroion exchange resin base membrane by co-extrusion casting, wherein perfluorosulfonic acid resin The thickness of the acid resin layer is 90 microns, and the thickness of the perfluorocarboxylic acid resin layer is 7 microns to obtain a perfluorinated ion exchange membrane precursor.

[0035] (2) under the temperature of 180 ℃, under the pressure of 120 tons, the perfluorinated ion-exchange membrane precursor that makes in the step (1) uses superpressure machine to carry out superpressure treatment with the speed of 45 meters per minute, superpressure After the pressure treatment, the perfluorinated ion exchange membrane precursor was immersed in a mixed aqueous solution containing 18wt% dimethyl sulfoxide and 20wt% NaOH at 85°C for 80 minutes to transform into a perfluorinated ion exchange membrane with ion exchange function.

[0036] (3)...

Embodiment 2

[0050] (1) The perfluorosulfonic acid resin of IEC=0.93mmol / g and the perfluorocarboxylic acid resin of IEC=0.95mmol / g are combined into a perfluoroion exchange resin base membrane by co-extrusion casting, wherein the perfluorosulfonic acid resin The thickness of the acid resin layer is 150 microns, the thickness of the perfluorocarboxylic acid resin layer is 8 microns, and the precursor of the perfluorinated ion exchange membrane is obtained.

[0051] (2) under the temperature of 200 ℃, under the pressure of 100 tons, with the perfluorinated ion exchange membrane precursor that makes in the step (1), carry out overpressure treatment with the speed of 45 m / min using overpressure machine, overpressure After pressure treatment, the precursor of the perfluorinated ion exchange membrane was immersed in a mixed aqueous solution containing 15wt% dimethyl sulfoxide and 20wt% NaOH at 80°C for 80 minutes to transform into a perfluorinated ion exchange membrane with ion exchange function...

Embodiment 3

[0063] (1) Perfluorosulfonic acid resin with IEC=1.3mmol / g and perfluorocarboxylic acid resin with IEC=1.22mmol / g are combined into perfluoroion exchange resin base membrane by co-extrusion casting, wherein perfluorosulfonic acid resin The thickness of the acid resin layer is 150 microns, and the thickness of the perfluorocarboxylic acid resin layer is 10 microns to obtain a perfluorinated ion exchange membrane precursor.

[0064] (2) under the temperature of 190 ℃, under the pressure of 100 tons, with the perfluorinated ion exchange membrane precursor that makes in the step (1), carry out overpressure treatment with the speed of 45 m / min using overpressure machine, overpressure After the pressure treatment, the precursor of the perfluorinated ion exchange membrane was immersed in a mixed aqueous solution containing 15 wt% dimethyl sulfoxide and 15 wt% NaOH at 80°C for 80 minutes to transform into a perfluorinated ion exchange membrane with ion exchange function.

[0065] (3) ...

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Abstract

The invention relates to an electrolytic cell diaphragm for the chlor-alkali industry and a preparation method thereof, and belongs to the technical field of ion exchange membranes. According to the electrolytic cell diaphragm and the method, the diaphragm comprises a base membrane, functional surface coatings are arranged on the two faces of the base membrane, the base membrane is composed of a perfluorosulfonic acid polymer layer and a perfluorocarboxylic acid polymer layer, and the functional surface coatings are of porous rough structures composed of perfluorinated ionic polymers. According to the electrolytic cell diaphragm and the method, the adhesive force of the surfaces of the diaphragm to bubbles is reduced, the effective electrolysis area of the surfaces of the diaphragm is increased, a local polarization phenomenon is reduced, the electrolytic cell diaphragm is suitable for operation in a novel zero-polar-distance electrolytic cell under a high-current density condition, the cell voltage can be remarkably reduced, and energy consumption is reduced; the invention also provides the simple and feasible preparation method.

Description

technical field [0001] The invention relates to an electrolyzer diaphragm used in the chlor-alkali industry and a preparation method thereof, belonging to the technical field of ion exchange membranes. Background technique [0002] The chlor-alkali industry is the basic industry of the national economy. Its products are widely used in various fields of the national economy such as agriculture, petrochemical industry, light industry, textile, chemical building materials, electric power, national defense and military industry, etc. It plays a pivotal role in my country's economic development. However, the chlor-alkali industry is a high-energy-consuming industry in my country's petroleum and chemical industries, which is mainly reflected in the power consumption of caustic soda production. In 2013, the national caustic soda consumed about 66.5 billion Kw h of alternating current, accounting for about 1.27% of the country's total power generation. It can be seen that energy co...

Claims

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Application Information

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IPC IPC(8): C25B13/08C25B1/46
CPCC25B1/46C25B13/08
Inventor 张永明张恒刘烽雷建龙宗少杰赵宽李晓
Owner SHANDONG DONGYUE POLYMER MATERIAL
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