Polyaluminum chloride is a kind of polymer inorganic coagulant, which is widely used in the field of water purification and has excellent water treatment effect. The product quality of polyaluminum chloride directly affects the water purification effect, so the production process of polyaluminum chloride is the key factor affecting the product quality of polyaluminum chloride.

The synthesis methods of polyaluminum chloride are as follows: 1. Boiling pyrolysis method, the crystal of aluminum chloride in 170 ℃ for boiling pyrolysis, and then add water, the water temperature is controlled above 60 ℃ for curing polymerization, and finally after curing, drying, crushing, it is processed into polyaluminum chloride. 2. Aluminum ash hydrochloric acid method: the aluminum ash is added into the reaction vessel containing washing water according to the corresponding proportion. After stirring and slowly adding hydrochloric acid at the same time, the full marching polycondensation reaction is carried out, and then the liquid polyaluminum chloride product is obtained after aging polymerization and static precipitation. Finally, the solid polyaluminum chloride product is obtained after drying process if necessary.

Polyaluminum chloride has become the most commonly used water purification agent. It plays a very good role in the treatment of industrial water and wastewater, urban water and sewage. It can remove iron, fluorine and radioactive pollution. High quality polyaluminum chloride is also used in the treatment of people's domestic water, as well as in cosmetics raw materials and food additives.