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Solubility of polyaluminum chloride at different temperatures

Polyaluminum chloride (PAC) is a commonly used flocculant, and its solubility is usually affected by temperature. Polyaluminum chloride has a high solubility in water and can dissolve in water at room temperature, generally reaching a concentration of 30% -50%. The solubility of it depends on factors such as pH value, temperature, and water quality.

Generally speaking, the trend of solubility change usually increases with the increase of temperature. This is because at higher temperatures, the thermal motion of solvent molecules is enhanced, which helps overcome intermolecular interactions and makes substances more easily soluble.

Specifically, when the water temperature is above 30 ° C, the solubility of polyaluminum chloride will significantly decrease. At 60 ° C, it is almost insoluble in water. When the water temperature reaches 100 ° C, polyaluminum chloride will decompose into aluminum trioxide and oxygen in the water. In addition, its solid softens at 220-230 ℃, and its aqueous solution undergoes significant degradation after 110 ℃.

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