Novel ionic conduction membrane for chlor-alkali industry and preparation method thereof

An ion-conducting membrane, a technology of the chlor-alkali industry, applied in the field of new-type ion-conducting membranes and their preparation, can solve problems such as difficult large-scale implementation, low anti-foaming ability, and reduced anti-foaming function, and achieve good degassing effect, Excellent degassing effect and reduced cell voltage

Active Publication Date: 2014-09-03
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hydrophilic coating modification process needs to be mixed with inorganic components and special binders, and then covered on the surface of the ion membrane by electrolytic deposition, particle embedding, etc. Patents CA2446448 and CA2444585 have introduced the coating process in detail ; Although the effect of this modification method is remarkable, the process is relatively complicated
In addition, because the ionic membrane will experience continuous scouring and turbulence caused by the lye fl

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Select the perfluorosulfonic acid resin of IEC=1.05mmol / g and the perfluorocarboxylic acid resin of IEC=1.0mmol / g to compound into the perfluorinated ion exchange resin base film by co-extrusion casting. The mass ratio of perfluorosulfonic acid resin and perfluorocarboxylic acid resin in the resin layer dominated by sulfonic acid resin is 100:0.5, and the perfluorocarboxylic acid resin and perfluorosulfonic acid resin in the resin layer mainly composed of perfluorosulfonic acid resin The resin mass ratio is 100:1, the thickness of the resin layer mainly composed of perfluorosulfonic acid resin is 120 microns, and the thickness of the resin layer mainly composed of perfluorosulfonic acid resin is 10 microns. Then soak the polytetrafluoroethylene non-woven fabric of the porous reinforcing material in the trifluorotrichloroethane solvent in the ultrasonic processor for 1.5 hours, wherein the thickness of the non-woven fabric is 50 microns, the porosity is 85%, take it o...

Embodiment 2

[0053] (1) Select the perfluorosulfonic acid resin of IEC=1.05mmol / g and the perfluorocarboxylic acid resin of IEC=0.95mmol / g to be compounded into perfluorinated ion exchange resin base membrane by co-extrusion casting. The mass ratio of perfluorosulfonic acid resin and perfluorocarboxylic acid resin in the resin layer dominated by sulfonic acid resin is 100:2, and the perfluorocarboxylic acid resin and perfluorosulfonic acid resin in the resin layer dominated by perfluorosulfonic acid resin The resin mass ratio is 100:0.5, the thickness of the resin layer mainly composed of perfluorosulfonic acid resin is 80 microns, and the thickness of the resin layer mainly composed of perfluorosulfonic acid resin is 15 microns. Then soak the polytetrafluoroethylene non-woven fabric of the porous reinforcing material in the mixed solvent of trifluorotrichloroethane and absolute ethanol in the ultrasonic processor for 2 hours, wherein the non-woven fabric has a thickness of 35 microns and a...

Embodiment 3

[0063](1) Select the perfluorosulfonic acid resin of IEC=1.1mmol / g and the perfluorocarboxylic acid resin of IEC=0.95mmol / g to compound into the perfluorinated ion exchange resin base film by co-extrusion casting. The mass ratio of perfluorosulfonic acid resin and perfluorocarboxylic acid resin in the resin layer dominated by sulfonic acid resin is 100:3, and the perfluorocarboxylic acid resin and perfluorosulfonic acid resin in the resin layer dominated by perfluorosulfonic acid resin The resin mass ratio is 100:2.5, the thickness of the resin layer mainly composed of perfluorosulfonic acid resin is 150 microns, and the thickness of the resin layer mainly composed of perfluorosulfonic acid resin is 7 microns. Then soak the polytetrafluoroethylene non-woven fabric of the porous reinforcing material in the mixed solvent of trifluorotrichloroethane and propanol in the ultrasonic processor for 2 hours, wherein the thickness of the non-woven fabric is 10 microns, and the porosity i...

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Abstract

The invention belongs to the technical field of ionic membranes and particularly relates to a novel ionic conduction membrane for chlor-alkali industry. The membrane consists of a perfluorosulfonate ion-exchange resin based membrane, a porous reinforcing material and a surface layer formed by mixing microparticles of fluorine-containing resin and particles of an inorganic compound. The particles of the inorganic compound are selected from one or more of oxides, hydroxides and nitrides of group IV-A, group IV-B, group V-B, iron, cobalt, nickel, chromium, manganese or boron. The microparticles of fluorine-containing resin comprise one or more of microparticles of polytetrafluoroethylene, microparticles of PFA (Polyfluoroalkoxy), microparticles of polyfluorinated ethylene propylene, microparticles of polyfluorinated propyl vinyl ether or microparticles of polyvinylidene fluoride. The ionic conduction membrane for chlor-alkali industry can stably and efficiently treat alkali chloride solutions with wide concentration range and is suitable for operation in a zero polar distance electrolytic bath under a novel electric current density condition, so that the product purity is high. The invention further provides a preparation method of the ionic conduction membrane and the preparation method is simple and reasonable in process and easy for industrialized production.

Description

technical field [0001] The invention belongs to the technical field of ion membranes, and in particular relates to a novel ion conduction membrane used in the chlor-alkali industry and a preparation method thereof. Background technique [0002] In recent years, in the production of chlor-alkali by ion-exchange membrane method, in order to realize electrolysis under the conditions of high current density, low cell voltage and high concentration of lye, in order to achieve the purpose of increasing productivity and reducing power consumption, the key is to shorten the ion-exchange membrane The distance between the electrode and the electrode can be reduced to reduce the cell voltage, so that the narrow pole distance ion membrane electrolysis process can be practical. With the continuous advancement of technology, the zero-electrode distance electrolyzer has been widely used, but when the distance between the electrodes is reduced to less than 2mm, the hydrogen bubbles attached...

Claims

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Application Information

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IPC IPC(8): C25B13/08C25B1/46
CPCC25B1/46C25B13/08
Inventor 王婧张永明杨淼昆张恒
Owner SHANDONG DONGYUE POLYMER MATERIAL
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