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    • 1. 发明申请
    • 含フッ素陽イオン交換膜および食塩電解方法
    • 含有荧光的交换膜和电泳SODA工艺
    • WO2002103083A1
    • 2002-12-27
    • PCT/JP2002/005973
    • 2002-06-14
    • 旭硝子株式会社西尾 拓久央斉藤 義彦下平 哲司
    • 西尾 拓久央斉藤 義彦下平 哲司
    • C25B13/08
    • C25B1/46C08J5/2281C08J2327/12
    • A cation−exchang membrane comprising at least two layers, a first layer consisting of a fluorine−containing polymer having a sulfonic acid group, and a second layer consisting of a fluorine−containing polymer having a carboxylic acid group on the cathode side thereof, wherein, when conducting an electrolytic soda process using the cation−exchange membrane as a diaphragm between an anode chamber and a cathode chamber, a water permeation amount through the cation−exchange membrane is at least 4.8 mol/F (F: Faraday) under operating conditions that a brine concentration in the anode chamber is 200 g/L, sodium hydroxide concentration in the cathode chamber 32 mass%, current density 5 kA/m 2 , and temperature 90°C. The electrolysis−use fluorine−containing cation−excahnge membrane gives an excellent effect of keeping a uniform catholyte concentration even when installed in an electrolytic bath without any special circulating means.
    • 包含至少两层的阳离子交换膜,由具有磺酸基的含氟聚合物组成的第一层和在其阴极侧由具有羧酸基的含氟聚合物组成的第二层,其中 当使用阳离子交换膜作为阳极室和阴极室之间的隔膜进行电解苏打工时,通过阳离子交换膜的透水量在操作条件下为4.8mol / F(F:法拉第) 阳极室中的盐水浓度为200g / L,阴极室中的氢氧化钠浓度为32质量%,电流密度为5kA / m 2,温度为90℃。 电解用含氟阳离子离子膜即使在没有任何特殊循环装置的情况下安装在电解槽中也具有保持均匀阴极电解液浓度的优异效果。