Water clarifierBHQ-133 is mainly a minor cationic polymer prepared by organic quaternary ammonium salt and crosslinking agent. It is applicable to wastewater treatment systems with low oil content and has a strong oil floating capability. The oil floated by BHQ-133 has fewer impurities than those floated by inorganic flocculants. It is used for wastewater treatment systems of oilfields and water treatment systems of factories and can accelerate demulsification speed of emulsified oil in wastewater and can make oil droplets rapidly flocculate to become large and floated . Used in wastewater treatment systems of oilfields, it can increase oil removal rates of equipments such as coalescers, flotation machines and hydraulic cyclones.