Polyaluminium ferric chloride is a kind of inorganic coagulant, which is also often called water purifying agent. Generally, the solid polyaluminum ferric chloride is reddish brown powder, which is mostly produced with bauxite, iron and hydrochloric acid as raw materials in production. It has the common characteristics of iron salt and aluminum salt, and can be used as a substitute for polyaluminum chloride and ferric chloride.

Our simple understanding of polyaluminum ferric chloride is that a large amount of iron is added in the process of producing polyaluminum chloride, which greatly increases the iron content in polyaluminum chloride. When the iron content in polyaluminum chloride reaches a certain requirement, a new water purifying agent product polyaluminum ferric chloride is produced by copolymerization. As a result, polyaluminum ferric chloride has many production properties of polyaluminium chloride, such as the solid aluminum ferric chloride is also divided into drum drying type and spray drying type, and spray drying polyaluminum ferric chloride has less impurities and higher quality spray polyaluminum ferric chloride can be used for drinking water treatment. However, the polyaluminum ferric chloride with roller drying has more impurities, which is generally used to treat industrial wastewater and urban sewage.

Therefore, it has the properties of iron salt and aluminum salt, so PAFC also has some advantages that PAFC and FeCl do not have. For example, polyaluminum ferric chloride is more suitable for lower temperature and wider range of pH value. It is important that the effect of polyaluminium chloride and ferric chloride in wastewater treatment is the same as that of using polyaluminium chloride and ferric chloride alone.

Poly ferric chloride is widely used in the treatment of drinking water, so the water quality of poly ferric aluminum chloride is safer and more secure than that of Poly aluminum chloride.