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Ion-exchange membrane, manufacturing method of ion-exchange membrane, and electrolyzer

An ion exchange membrane and ion exchange technology, applied in chemical instruments and methods, organic diaphragms, synthetic resin layered products, etc., can solve the problem of no cathode activity, and achieve the effect of stable electrolytic performance and less impact

Active Publication Date: 2016-09-07
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In addition, Patent Document 2 proposes an ion exchange membrane provided with a gas- and liquid-permeable porous layer containing titanium, zirconium, niobium, tantalum, hafnium, tin, vanadium, manganese, molybdenum, tungsten, aluminum, Chromium, gallium, cerium, thorium, selenium, iron, yttrium, rare earths, indium, nickel, silver, cobalt, beryllium oxides, nitrides, carbides and their mixtures, not cathodically active

Method used

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  • Ion-exchange membrane, manufacturing method of ion-exchange membrane, and electrolyzer
  • Ion-exchange membrane, manufacturing method of ion-exchange membrane, and electrolyzer
  • Ion-exchange membrane, manufacturing method of ion-exchange membrane, and electrolyzer

Examples

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Effect test

Embodiment 1

[0197] As a reinforcing core material, a polytetrafluoroethylene (PTFE) 100-denier flat yarn twisted at 900 times / m was used (hereinafter referred to as PTFE thread). As the sacrificial yarn of the warp, a polyethylene terephthalate (PET) with 35 denier and 8 filaments twisted 200 times / m (hereinafter referred to as PET yarn) was used. In addition, as the sacrificial yarn of the weft, a polyethylene terephthalate (PET) with 35 denier and 8 filaments twisted at 200 twists / m was used. First, the number of PTFE threads was 24 / inch, and two sacrificial threads were arranged between adjacent PTFE threads to perform flat weaving to obtain a woven fabric with a thickness of 100 μm.

[0198] Next, using CF 2 =CF 2 with CF 2 =CFOCF 2 CF(CF 3 )OCF 2 CF 2 COOCH 3 The copolymer prepared ion exchange capacity is the polymer (A1) of dry resin of 0.84mg equivalent / g, utilizes CF 2 =CF 2 with CF 2 =CFOCF 2 CF(CF 3 )OCF 2 CF 2 SO 2 Copolymer of F A polymer (B1) of dry resin hav...

Embodiment 2

[0206] In Example 1, the dispersion by the ball mill was adjusted until the average particle diameter of the zirconia particles in the suspension was 1.12 μm to obtain a suspension; except that, an ion exchange membrane was produced in the same manner as in Example 1. .

[0207] The dried coating of the ion-exchange membrane was measured by fluorescent X-ray measurement, and the coating density was measured per 1 cm 2 0.5mg in. In addition, the specific surface area of ​​the coating obtained by scattering measured by SAXS was 2.2m 2 / g.

[0208] The ion-exchange membrane with the dry coating was wetted with 2% by weight of sodium bicarbonate, and then the ion-exchange membrane was used to measure the tolerance of impurities in finite-gap electrolysis. As a result, the reduction in current efficiency was 0.27% / day, showing relatively High impurity durability. The results are listed in Table 1.

Embodiment 3

[0210] In Example 1, the zirconia particles were changed to particles with a primary particle diameter of 2.50 μm, and the dispersion by a ball mill was adjusted until the average particle diameter of the zirconia particles in the suspension was 1.80 μm to obtain a suspension. ; Except that, an ion exchange membrane was produced in the same manner as in Example 1.

[0211] The dried coating of the ion-exchange membrane was measured by fluorescent X-ray measurement, and the coating density was measured per 1 cm 2 0.5mg in. In addition, the specific surface area of ​​the coating obtained by scattering measured by SAXS was 1.8m 2 / g.

[0212] The ion-exchange membrane with the dry coating was wetted with 2% by weight of sodium bicarbonate, and then the ion-exchange membrane was used to measure the tolerance of impurities in finite-gap electrolysis. As a result, the reduction in current efficiency was 0.24% / day, showing Higher impurity durability. The results are listed in Tab...

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Abstract

The invention relates to an ion exchange membrane, a manufacturing method of ion exchange membrane, and an electrolytic cell. An object of the invention is to provide an ion exchange membrane with electrolysis performance less influenced by impurities in an electrolyte solution and capable of playing stable electrolysis performance. The ion exchange membrane provided by the invention comprises a membrane main body and a coating, wherein the membrane main body comprises a fluorine-containing polymer with ion exchange radicals; and the coating is disposed on at least one surface of the membrane body. The coating contains inorganic particles and an adhesive; and a specific surface area of the coating is 0.1 m<2 / g>-10 m<2 / g>.

Description

technical field [0001] The present invention relates to an ion-exchange membrane, a method for producing the ion-exchange membrane, and an electrolytic cell equipped with the ion-exchange membrane. Background technique [0002] Fluorine-containing cation exchange membranes are excellent in heat resistance and chemical resistance, and are therefore used as electrolytic cation exchange membranes for producing chlorine and alkali by electrolysis (electrolysis) of alkaline chlorides or the like. In addition, it is also used as a separator for ozone generation, a separator for fuel cells, water electrolysis, hydrochloric acid electrolysis, etc., and the like. [0003] Among them, in the electrolysis of salt water and the like to produce sodium hydroxide and alkaline chlorides of chlorine and hydrogen, the following cation exchange membrane is generally used. A carboxylic acid layer with exchange groups and a low-resistance sulfonic acid layer with sulfonic acid groups as ion exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B13/08B32B27/14
Inventor 角佳典服部行久
Owner ASAHI KASEI KK
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