In the ion-exchange membrane caustic soda industry, the content of calcium, magnesium, barium, strontium and other impurities in brine has always been an important indicator. Jiangsu Kingshan New Material Co., Ltd. BMAH is specially used for brine refining and has high refining capacity for secondary brine. It has a wide range of requirements for various ion content and has been widely used in industry. Its structure is very firm and chemical stability is good , large chelating capacity, strong adsorption to metal ions. It is mainly used for the secondary brine purification in the chlor-alkali industry, the recovery of precious metals, and the treatment of metal wastewater, etc.