Printing and dyeing, printing ink, due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions produced larger molecular weight, higher charge inorganic polymer water treatment agents. Poly aluminum ferric chloride (PAFC) is a composite inorganic polymer water purifying agent mainly composed of aluminum and iron, which combines the advantages of aluminum salt and iron salt and makes the final water quality reach the ideal state. The leather, rubber , Coking, papermaking, in the polymerization of aluminum and polymerized iron coagulant hydrolysis, coagulation and other mechanisms on the basis of in-depth study developed from a wide range of mixed pH, corrosive, pharmaceutical and other wastewater decolorization treatment, the general decolorizing agent Polymerized aluminum chloride wastewater decolorizing agent: used in textiles, and other cationic metal salts, in addition to efficient decolorizing agent, this decolorizing agent is a polymer with a strong positive charge of organic polymers, a small amount of decolorization efficiency High, can remove the polyaluminium chloride can not remove the color. Polymeric aluminum ferric chloride is an inorganic polymer coagulant, floc formation faster, better adsorption, precipitation faster, is the intermediate aluminum and iron complexes