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1. 发明授权

US06984669B2 Fluorinated cation exchange membrane and electrolytic soda process 有权
标题翻译：氟化阳离子交换膜和电解苏打工艺
公开(公告)号：US06984669B2
公开(公告)日：2006-01-10
申请号：US10703443
申请日：2003-11-10
申请人： Takuo Nishio , Yoshihiko Saito , Tetsuji Shimohira
发明人： Takuo Nishio , Yoshihiko Saito , Tetsuji Shimohira
IPC分类号： C08J5/20
CPC分类号： C25B1/46 , C08J5/2281 , C08J2327/12
摘要： The present invention provides a fluorinated cation exchange membrane comprising at least two layers, a first layer made of a fluoropolymer having sulfonic acid groups and a second layer made of a fluoropolymer having carboxylic acid groups on the cathode side thereof, wherein when an electrolytic soda process is conducted using the cation exchange membrane as a diaphragm between an anode compartment and a cathode compartment, the water transport number through the cation exchange membrane is at least 4.8 mol/F (F: Faraday) under operating conditions such that the brine concentration in the anode compartment is 200 g/L, the sodium hydroxide concentration in the cathode compartment is 32 mass %, the current density is 5 kA/m2, and the temperature is 90° C. The fluorinated cation exchange membrane of the present invention gives an excellent effect such that a uniform catholyte concentration can be maintained even when installed in an electrolytic cell having no special circulating means.
摘要翻译：本发明提供一种氟化阳离子交换膜，其包含至少两层，由具有磺酸基的含氟聚合物构成的第一层和在其阴极侧具有羧酸基的含氟聚合物构成的第二层，其中，当电解苏打工艺使用阳离子交换膜作为阳极室和阴极室之间的隔膜进行，通过阳离子交换膜的水输送数量在操作条件下至少为4.8mol / F（F：法拉第），使得在阳极室为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℃。氟化阳离子交换本发明的膜具有优异的效果，使得即使安装在没有特殊循环的电解槽中也能够保持均匀的阴极电解液浓度吃饭的意思。

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