What is poly aluminum chloride (PAC)?

Poly Aluminium Chloride, commonly abbreviated as PAC, is an inorganic polymer that belongs to the family of aluminum salts. It is a compound primarily used as a coagulant and flocculant in water treatment processes.

Why is polyaluminum chloride a good coagulant for water treatment?

Polyaluminum chloride (PAC) is highly effective coagulant for water treatment over conventional coagulants because of low dosage requirement, shorter flocculation time, smaller amount of sludge, high efficiency and low aluminum residual in treated water .

What is poly Aluminium chloride?

Today, More and more companies focus on Poly aluminium chloride. It is a unique aluminum salt substance of aluminium chlorohydrate, and it is also simply called PAC. The general chemical formula is [Al2 (OH)nCl6-n]m (1≤n≤5 , m≤10). CAS No.: 1327-41-9.

Is PAC a polymer flocculation catalyst?

The literature also indicates that Al 13 has a molecular scale of 1–2 nm and has a high charge, which is considered to be the most stable active species in PAC. Thus, PAC as “inorganic polymer flocculation catalyst” demonstrated its structural characteristics in the organic synthesis reaction system.

How much product can be obtained from a polymer flocculant?

When the reaction scale was expanded to 20 mmol, 6.23 g (89%) of product could be obtained. The classic inorganic polymer flocculant—polyaluminum chloride (PAC)—was used as an environmentally friendly, efficient, and recyclable catalyst in the synthesis of Bis (indolyl)methanes (BIMs) compounds for the first time.

Why is poly aluminum chloride a coagulant?

Poly Aluminium Chloride exhibits several essential chemical properties that contribute to its effectiveness as a coagulant. It is highly soluble in water and capable of generating a wide range of polymeric species based on its degree of polymerization. PAC solutions are acidic due to the presence of hydrolyzed aluminum species.