Alkaline aluminum chloride English referred to as PAC or BAC, is an inorganic high polymer polyelectrolyte coagulant, can be regarded as between aluminum trichloride and aluminum hydroxide intermediate product of a black hydrolyzate. The quality of technical standards in line with national GB15892-2009 standards, basic aluminum chloride is the late 60s, officially put into industrial production and application of a new type of inorganic polymer coagulant, accompanied by the occurrence of condensation, adsorption, precipitation and a series of physical Chemical process, so as to achieve the purpose of purification. Purification efficiency. Low cost and a series of advantages. Is the use of industrial aluminum ash and activated bauxite as raw material after polymerization polymerization, the higher activity of this product for industrial wastewater, paper water, printing and dyeing water has a better purification effect. Due to the number of hydroxyl groups in the molecule, when polyaluminum chloride is added to turbid source water, it continues to hydrolyze in the pH of the source water. During the hydrolysis, polyaluminum chloride (PAC) is a new type of inorganic high Molecular flocculant. Color is yellow or light yellow, dark brown, dark gray resinous solid. With less dosage