Emulsion special agent 3 belongs to the field of inorganic polymer grafted copolymer, high molecular weight, unique chemical structure; after dissolving in water, can also play between particle adsorption bridging and charge neutralization, wastewater containing emulsified oil, colloidal condensed and precipitation; excellent oil removal, removal of color and COD removal efficiency. And excellent performance, fast removal, the complete removal of oil glial, in water with alum flowers large, fast sedimentation rate, decolorization rate greater than 90%, COD removal rate is extremely high, amount of sludge.