Polyaluminum Chloride PAC
Poly Aluminium Chloride (PAC) is a salt commonly used in water purification and as a coagulant. Compared to other aluminum salts, it’s best suited for removing and destabilizing suspended materials- thanks to its high charge.
It is used in water purification, ensuring water is safe for drinking. Like all other coagulants, it works by extracting all the dissolved matter in water by clumping them together and then suspending them. The resultant matter is then filtered and disposed of.
Grades Of Poly Aluminium Chloride (PAC)
There are various grades of Polyaluminium chloride in the market with varying degrees of aluminum concentration- usually 9.5% – 18%. While choosing which grade to use, there are other factors other than the concentration of aluminum to take into consideration.
Commercial grade PAC products tend to have a higher degree of basification. This is the degree of concentration of Hydroxyl groups relative to aluminum ions. As a rule of thumb in PAC usage, the higher the basicity, the higher the efficiency, cationic charge density, and polymer value.
Poly Aluminium coagulants are increasingly finding their way into portable water treatment plants. In several instances during post-treatment pH adjustment, usage of alkali proved to be unnecessary. This has a positive effect not only on the quality of water but also on savings on production costs and maintenance requirements.
Uses of PAC
It’s used in the purification of drinking water.
Processing of sewage water.
Industrial manufacturing of paper making glue.
Printing and dying.
Construction where it’s used in hardening concrete.
Precision casting hardening.
Big pharma in the making of medicine.
Separation of Oil and water in refineries.
Beauty and cosmetics.
Production of grease-resistant products for fabrics.
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