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    • 52. 发明授权
    • Method for producing an alkali metal hydroxide and electrolytic cell
useful for the method
    • 用于该方法的碱金属氢氧化物和电解槽的制造方法
    • US4969982A
    • 1990-11-13
    • US941831
    • 1986-12-15
    • Haruhisa MiyakeIsamu KanekoAtsushi Watakabe
    • Haruhisa MiyakeIsamu KanekoAtsushi Watakabe
    • C25B9/00C08J5/22C25B1/46C25B9/08C25B13/08
    • C08J5/2281C25B1/46
    • A method for producing an alkali metal hydroxide by electrolysis in an electrolytic cell comprising an anode compartment and a cathode compartment, which comprises supplying an alkali metal chloride to the anode compartment and water or a dilute alkali metal hydroxide to the cathode compartment, wherein a fluorine-containing cation exchange membrane comprising a first outer layer of a perfluorocarbon polymer having --SO.sub.3 M groups (wherein M is an alkali metal) with a thickness of at least 5 .mu.m, and a second layer of a perfluorocarbon polymer having --CO.sub.2 M groups (wherein M is an alkali metal) and a water content of from 2 to 7% by weight in a 45% wt % NaOH aqueous solution with a thickness of at least 5 .mu.m, the water content of the first layer being higher than that of the second layer, is disposed with the first layer facing the cathode compartment.
    • 一种在包括阳极室和阴极室的电解池中通过电解生产碱金属氢氧化物的方法,包括向阳极室供应碱金属氯化物,将水或稀碱金属氢氧化物供应至阴极室,其中氟 包含阳离子交换膜,其包含具有-SO 3 M基团的全氟化碳聚合物(其中M为碱金属)的第一外层,其厚度为至少5μm,第二层具有-CO 2 M基团的全氟化碳聚合物(其中 M为碱金属),水分含量为2〜7重量%,厚度为5μm以上的45重量%NaOH水溶液中,第1层的含水量高于 第二层设置有第一层面向阴极室。