Basic aluminum chloride is an early water treatment agent in China, generally with black appearance. Because of the rise of polyaluminum chloride in recent years, it has gradually replaced basic aluminum chloride as the mainstream product in the market, but in some aspects, it still has its unique use.

The basic aluminum chloride has the advantages of fast flocculation and high sedimentation efficiency. It has different effects of general water purification agents in the treatment of papermaking and printing and dyeing industrial wastewater. This is mainly because there are a lot of wood fibers and clothing fibers in the wastewater of papermaking and printing and dyeing industry, and these fibers are large. Some fibers can even be observed directly. Basic aluminum chloride can react with these fibers quickly to form large alum and sink rapidly. It has the characteristics of short treatment time and good water quality after treatment. Most of the wastewater in papermaking and printing and dyeing industry is high concentration wastewater. Without adding some other additives, basic aluminum chloride printing and dyeing can achieve good wastewater treatment effect. In papermaking industry, some wastewater containing a large amount of lignic acid is often treated, and basic aluminum chloride can neutralize acid well, making wastewater treatment achieve ideal effect.

Therefore, the basic aluminum chloride has better effect than the general flocculant in the printing and dyeing and papermaking industry. However, because the production process of basic aluminum chloride is more complex, many manufacturers of basic aluminum chloride sell inferior products as good ones. Therefore, when selecting basic aluminum chloride, we should also pay attention to the manufacturers with guaranteed product quality.