The color of polyaluminum chloride has a great relationship with the content.
There are three main factors to measure the effect of polyaluminum chloride: basicity, aluminum oxide content and water insoluble matter. But from the appearance, the color of polyaluminum chloride is also very different. In addition to the difference in production process, the difference in color is directly related to the content of aluminum oxide.
White polyaluminum chloride is called high-purity iron-free white polyaluminum chloride, or food-grade white polyaluminum chloride. Compared with other polyaluminum chlorides, it is the highest quality product. The main raw material is high-quality aluminum hydroxide. Powder, hydrochloric acid, the production process used is the most advanced technology spray drying method in China. White polyaluminum chloride is used in papermaking sizing agent, sugar decolorizing and clarifying agent, tanning leather, medicine, cosmetics, precision casting and water treatment and other fields. White polyaluminum chloride has the highest aluminum oxide content, which can reach more than 31%.
The raw materials of golden yellow polyaluminum chloride are calcium aluminate powder, hydrochloric acid and bauxite, which are mainly used in sewage treatment and drinking water treatment. If the raw materials for drinking water treatment are aluminum hydroxide powder, hydrochloric acid and a little aluminate Calcium powder adopts plate and frame filter press process or spray drying process. Due to the strict requirements on heavy metals in drinking water treatment countries, both raw materials and production processes are better than tan polyaluminum chloride. Yellow polyaluminum chloride is generally produced by drum drying or spray tower drying, and has two solid forms: flake and powder. The content of yellow polyaluminum chloride aluminum oxide is 28-30%.
The raw materials of brown and khaki polyaluminum chloride are calcium aluminate powder, hydrochloric acid, bauxite and iron powder. The production process adopts the drum drying method, which is generally used for sewage treatment. Because iron powder is added, the color is tan. The more iron powder is added, the darker the color. Known as polyaluminum ferric chloride, it has an excellent effect in sewage treatment. The content of aluminum oxide in brown and khaki polyaluminum chloride is about 24%.
If you want to know more about polyaluminum chloride products, you can contact our Henan filter source staff, and we can arrange on-site guidance by professional technicians. Or if you have any questions during the use of flocculants, you can contact us or pay attention to our polyaluminum chloride.