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    • 6. 发明专利
    • Method for manufacturing lithium hydroxide
    • 制造氢氧化锂的方法
    • JP2014173144A
    • 2014-09-22
    • JP2013047158
    • 2013-03-08
    • Asutomu:Kk株式会社アストム
    • MATSUI TAKAOKAWAHARA TAKEO
    • C25B1/16B01D61/46B01J47/12C01D1/38C01D15/02
    • PROBLEM TO BE SOLVED: To provide a method for manufacturing lithium hydroxide having a high production efficiency by performing an electrodialysis stably and continuously at a low cell voltage without entailing electric conduction hindrances due to the generation of a carbon dioxide gas.SOLUTION: The provided method for manufacturing lithium hydroxide is a method for manufacturing lithium hydroxide by subjecting, to electrodialysis using bipolar membranes, a mineral acid lithium salt such as lithium sulfate, etc. wherein the electrodialysis is performed, within a double chamber-type electrodialyzer possessing in-between an anode and a cathode at least one pair of salt chamber and alkali chamber formed adjacently via a cation exchange membrane in a state where the cation exchange membrane is being positioned in-between two bipolar membranes, by supplying through the salt chamber a current while 0.05-0.2 equivalent of an organic acid such as citric acid, oxalic acid, etc. is being fed therein together with the mineral acid lithium salt, and wherein lithium hydroxide is generated by transferring lithium ions within the salt chamber into the alkali chamber.
    • 要解决的问题:提供一种通过在低电池电压下稳定且连续地进行电渗析而制造具有高生产效率的氢氧化锂的方法,而不会由于二氧化碳气体的产生而导致导电阻碍。解决方案:提供的方法 用于制造氢氧化锂的方法是通过在双室型电渗析器之间进行电渗析的双极膜电渗析等硫酸锂等无机酸锂盐进行电渗析的方法, 阳极和阴极,在阳离子交换膜位于两个双极膜之间的状态下,通过阳极交换膜相邻地形成至少一对盐室和碱室,通过在盐室中供给电流而0.05- 加入0.2当量的有机酸如柠檬酸,草酸等 与无机酸锂盐一起使用,并且其中通过将盐室内的锂离子转移到碱室中而产生氢氧化锂。
    • 9. 发明专利
    • Method of producing ion-exchange membrane
    • 生产离子交换膜的方法
    • JP2012224708A
    • 2012-11-15
    • JP2011092118
    • 2011-04-18
    • Astom:Kk株式会社アストム
    • OMURA NOBUHIKOMIZUGUCHI KAZUONISHIO KAZUNORIARITOMI TOSHIO
    • C08J5/20C08K3/20C08K5/00C08L23/06
    • PROBLEM TO BE SOLVED: To provide a method of producing an ion-exchange membrane formed by using a porous base material sheet, wherein ion exchange properties are improved.SOLUTION: The method of producing the ion-exchange membrane includes: a step of producing a polyethylene sheet by using a polyethylene composition that comprises a relatively high-molecular weight polyethylene, a relatively low-molecular weight polyethylene, and a pore-forming additive; a step of removing the pore-forming additive from the polyethylene sheet to obtain a porous polyethylene sheet through which pores penetrate; a step of preparing a polymerizable composition that contains a monomer having an ion-exchange group or a functional group which can introduce the ion exchange group, a crosslinking monomer, and a polymerization initiator; a step of producing an ion-exchange membrane precursor by filling a gap of the porous polyethylene sheet with the polymerizable composition; and a step of polymerizing the polymerizable composition in the ion-exchange membrane precursor at temperature in which the polyethylene contained in the porous polyethylene sheet is partially melted.
    • 解决的问题:提供一种通过使用多孔基材片形成的离子交换膜的制造方法,其中离子交换性能得到改善。 解决方案:制备离子交换膜的方法包括:通过使用包含相对高分子量聚乙烯,相对低分子量聚乙烯和孔隙率聚乙烯的聚乙烯组合物制备聚乙烯片的步骤, 成型添加剂; 从聚乙烯片中除去造孔添加剂的步骤,得到孔渗透的多孔聚乙烯片; 制备含有具有离子交换基团的单体或可以引入离子交换基团的官能团的单体的聚合性组合物,交联单体和聚合引发剂的工序; 通过用可聚合组合物填充多孔聚乙烯片的间隙来生产离子交换膜前体的步骤; 以及在多孔聚乙烯片中所含的聚乙烯部分熔融的温度下使离子交换膜前体中的聚合性组合物聚合的工序。 版权所有(C)2013,JPO&INPIT