Basic aluminum chloride (BAC) is an electrolyte coagulant with inorganic high polymer,it can be considered as an intermediate hydrolysis products between aluminum chloride and aluminum hydroxide. Its chemical formula is [AL2 (OH) nCL6-n] m

As a new coagulant,basic aluminum chloride has the following advantages :

1,It has a unique performance in treatment of paper and printing wastewater. 
2,Floc formation rapid ,high sedimentation rate ,thus reaction time can be shortened, in the appropriate conditions to increase production capacity 1.5-3 times. 
3,In the same content,basic aluminum chloride coagulation under the water,the consumption of hardness is less than the other various inorganic coagulant, the water treatment PH value also reduced. When deal with water, especially in the treatment of high concentration of water, may decrease add or without alkaline additives and the coagulant. 
 4,Its decolorization ability than other inorganic water purifying agent.