Method for preventing contamination of electrodialysis membrane
专利汇可以提供Method for preventing contamination of electrodialysis membrane专利检索，专利查询，专利分析的服务。并且PURPOSE: To desalt by electrodialysis an aq. soln. contg. inorganic salts and electrodialysis membrane contaminants such as protein, coloring matter, and humic acid by regulating previously the pH of the liquid to an isoelectric point of the contaminant or in the vicinity thereof.
CONSTITUTION: An anion-exchange resin membrane and a cation-exchange resin membrane which are commonly used for giving the potential gradient are alternately arranged for electrodialysis. The anion-exchange resin membrane to be decontaminated, for example, is a common anion-exchange membrane obtained by disposing quaternary amine as a functional group in a polymer contg. a styrenic skeleton. The membrane contaminants are mostly amphoteric polymers such as protein, coloring matter and humic acid, and can be electrically discharged by regulating the pH of the liquid to the isoelectric point of the contaminants. The pH can be regulated by using alkalis or acids, and a mineral acid such as hydrochloric acid, sulfuric acid, and nitric acid and an organic acid such as acetic acid are used as the acid and caustic soda, caustic potash, lime, ammonia, etc. as alkalis.
COPYRIGHT: (C)1985,JPO&Japio，下面是Method for preventing contamination of electrodialysis membrane专利的具体信息内容。
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