Polyaluminum chloride, referred to as high-efficiency polyaluminum chloride, or high-efficiency PAC. It adopts the most advanced production technology and uses high-efficiency high-quality raw materials to react and polymerize. Production is carried out in accordance with the requirements of the national standard GB15892-2009. Polyaluminum chloride is processed by spray drying process. Therefore, it can also be called high-efficiency spray-dried polyaluminum chloride.
| No. | ITEM | UNIT | STANDARD | RESULT |
| 1 | Appearance | -- | Yellow powder | Yellow powder |
| 2 | Al2O3 | % | ≥29.0 | 30.2 |
| 3 | Basicity | % | 45.0-90.0 | 81.8 |
| 4 | pH value
(10g/L aqueous solution) |
-- | 3.5-5.0 | 4.09 |
| 5 | Mass fraction of insoluble matter | % | ≤0.1 | 0.08 |
| 6 | As | % | ≤0.0001 | 0.00006 |
| 7 | Pb | % | ≤0.0005 | 0.00002 |
| 8 | Cd | % | ≤0.0001 | 0.000002 |
| 9 | Hg | % | ≤0.00001 |
0.000006 |
| 10 | Cr | % | ≤0.0005 | 0.00023 |
| 11 | Fe | % | ≤0.2 | 0.023 |
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 hydroxide Aluminum powder and hydrochloric acid are produced using the most advanced spray drying method in China. White polyaluminum chloride is used in many fields such as paper-making sizing agent, sugar decolorization clarifying agent, leather tanning, medicine, cosmetics, precision casting and water treatment.
The raw materials of yellow polyaluminum chloride are calcium aluminate powder, hydrochloric acid and bauxite, which are mainly used in sewage treatment and drinking water treatment. The raw materials for drinking water treatment are aluminum hydroxide powder, hydrochloric acid, and a little aluminum Calcium acid powder, the process adopted is the plate and frame filter press process or spray drying process. For the treatment of drinking water, the country has strict requirements on heavy metals, so both raw materials and production processes are better than brown polyaluminum chloride. Yellow polyaluminum chloride is generally produced by drum drying or spray tower drying, and there are two solid forms of flakes and powders.
The basicity of polyaluminum chloride is a relatively important index in polyaluminum, especially for drinking water grade polyaluminum products. The lower the salinity, the higher the price, and each purchaser can operate according to the actual situation of the manufacturer. In addition, the basicity of polyaluminum chloride products produced by different raw materials and different processes is also different, which requires manufacturers to adjust. Increasing the basicity of polyaluminum chloride products can greatly improve the economic benefits of production and use. The basicity is increased from 65% to 92%, the cost of production raw materials can be reduced by 20%, and the cost of use can be reduced by 40%.
