Polyaluminum chloride is a new water purification material, inorganic polymer coagulant, poly aluminum chloride, PAC(Poly aluminum chloride), it is between AlCI3 and Al(OH)3, a water-soluble inorganic polymer, The chemical general formula is [Al2(OH) Ncl6-NLM], where M represents the degree of polymerization and N represents the degree of neutrality of PAC products. In m product, n=1-5 is a high charge polymeric ring chain with Keggin structure, which has high electrical neut...