Polyaluminum chloride sold on the market generally has three colors of white, yellow, tan polyaluminum chloride, the following to explain the difference between the use of three different colors.

The polyaluminum chloride with alumina content between 27-30 in the national standard range is mostly a solid powder form of earthy yellow to yellow light yellow. The water solubility of these types of polyaluminum chloride is better, and the physical and chemical changes such as electrochemistry, condensation, adsorption and precipitation are accompanied by the final formation of [Al2(OH)3(OH)3]∝↓ during the dissolution process, so as to achieve the purpose of purification. Therefore, when using polyaluminum chloride, there is no need to add other additives, the formation of flocculants is fast and coarse, the activity is high, the precipitation is fast, and the purification effect of high turbidity water is obvious.

1. White polyaluminum chloride because it is called high purity iron free white polyaluminum chloride, or food grade white polyaluminum chloride, compared with other polyaluminum chloride is the highest quality products, the main raw materials are high-quality aluminum hydroxide powder, hydrochloric acid, the production process is the most advanced technology spray drying method in China. White polyaluminum chloride is used in many fields such as papermaking sizing agent, sugar decolorizing clarifying agent, tanning leather, medicine, cosmetics, precision casting and water treatment.

   
   

2. Yellow polyaluminum chloride raw materials are calcium aluminate powder, hydrochloric acid, bauxite, mainly used in sewage treatment and drinking water treatment, if the raw material for drinking water treatment is aluminum hydroxide powder, hydrochloric acid and a little calcium aluminate powder, the process is a plate and frame filter process or spray drying process, because the treatment of heavy metals in the drinking water country has strict requirements, Therefore, both raw materials and production processes are better than brown polyaluminum chloride. Yellow polyaluminum chloride is generally produced by drum drying production or spray tower drying production, there are two solid forms of flake, powder.

   
   

3. The raw materials of brown polyaluminum chloride are calcium aluminate powder, hydrochloric acid, bauxite and iron powder. The production process is the use of drum drying method, generally mainly used for sewage treatment, because it adds iron powder so the color is brown, the more iron powder added the darker the color, iron powder if more than a certain amount is also known as polyaluminum iron chloride in some times, in sewage treatment has excellent results.