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How to identify the content of polyaluminum chloride?

  • Author:Carria Wang
  • Source:Original
  • Release on:2022-04-15

The color of polyaluminum chloride varies depending on its content. For example, the appearance is powder and the color is golden yellow or light yellow and yellow-brown. With the change of polyaluminum chloride production process and raw materials, many customers can truly distinguish the content of polyaluminum with the naked eye.

Put polyaluminum chloride in the sun. If it is 30 content of polyaluminum chloride, it is usually shiny golden yellow or light yellow, and 28 content is also glossy, but the color is slightly darker yellow. If it is non-standard, the color will be darker.

Generally speaking, the content of polyaluminum chloride within the national standard is 27-30, which is yellow or light yellow solid powder, easily soluble in water, and has strong bridging adsorption. During the hydrolysis process, with the physical and chemical changes such as electrochemistry, coagulation, adsorption, and precipitation, [Al2(OH)3(OH)3]α↓ is finally formed to purify the object.

Polyaluminum chloride does not need to add other additives, the flocculation is fast and rough, the activity is high, the precipitation speed is fast, and the purification effect of high turbidity water is obvious. Its pH value is suitable for a wide range and has no corrosive effect on pipeline equipment.

Alternatively, the quality of the PAC product that distinguishes different quantities can be determined by the water-insoluble material. Go to the mineral water bottle and fill it with water. Take an appropriate amount of polyaluminum chloride for testing, put it in a water bottle, shake the lid vigorously, until the polyaluminum chloride is completely dissolved. Then let stand for an hour and observe the amount of water insoluble at the bottom of the bottle. Less is better.