PAC is a kind of inorganic macromolecule flocculant. Through the hydroxyl ion bridging function and the polyvalent anion polymeric function, it produces large molecular and high electricity inorganic macromolecule. It adapts a wide PH range of 5.0~9.0, and the best is between 6.5~7.6. 1) Purification of river water, lake water and underground water 2) Purification of industry water and industry recycling water. 3) Purification of waster water 4) Reclaiming coal from coal-washing waste water and kaolin in ceramic industry 5) Purification of the waste water in printing and dyeing industry, leather industry, brewage industry, meat-processing industry, coal-washing, metallurgy industry, mine, pharmacy, paper-making, and purification of the waste water containing fluorine, oil and heavy metals 6) Tannage and cloth cockling-prevent 7) Cement Solidifying, and moulding 8) Refining of pharmaceuticals, glycerine and sugar 9) Catalyzer carrier 10) Paper-making glue Application: 1. Its dosage lower than aluminum sulfate (based on Al2O3) and water treatment cost is lower than other inorganic flocculants. 2. The product can cause quick formation of flocs, big flocs formation and rapid precipitation. Its treatment capacity is 1.3-3.0 times of other inorganic flocculants. 3. It enjoys wide-range adaptability for different-temperature source water and a good solubility. 4. It is slightly corrosive and easy for operation. 5. The liquid product is suitable for automatic dosing. Furthermore, it will not block pipes over long-time usage.