发明名称 |
Fluorine-containing cation exchange membrane for electrolysis and process for producing alkali metal hydroxide by using the same. |
摘要 |
<p>A fluorine-containing cation exchange membrane for electrolysis, which comprises a multi-layered structure prepared by integrally laminating (i) the first ion exchange layer having -COOM groups (M is hydrogen or an alkali metal) in an ion exchange capacity of from 0.6 to 2.0 meq/g dry resin and having a thickness of from 5 to 300 mu m, (ii) the second ion exchange layer present on the anode side of the first ion exchange layer, the second ion exchange layer having a smaller specific resistance and a larger thickness than the first ion exchange layer, and (iii) a hydrophilic asymmetric porous layer present on the cathode side of the first ion exchange layer, the porous layer having a water-permeability which becomes smaller in proportion as closer to the cathode side, and a process for producing an alkali metal hydroxide by using the above fluorine-containing cation exchange membrane.</p> |
申请公布号 |
EP0477432(B1) |
申请公布日期 |
1995.03.22 |
申请号 |
EP19900123472 |
申请日期 |
1990.12.06 |
申请人 |
ASAHI GLASS COMPANY LTD. |
发明人 |
SHIMOHIRA, TETSUJI;HIGUCHI, YOSHIAKI;SAITO, YOSHIHIKO;SUZUKI, KOHJI |
分类号 |
C25B13/08;C08J5/22;(IPC1-7):C08J5/22 |
主分类号 |
C25B13/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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