Poly Aluminium Chloride (PAC)

Poly Aluminium Chloride (PAC) is an advanced, highly efficient inorganic polymer coagulant used extensively in water treatment processes. It appears as a yellow or white powder and dissolves easily in water. PAC is known for its rapid flocculation, strong adsorption, and high performance even in low dosages, making it a preferred alternative to traditional coagulants like alum.

Uses:

1. Water & Wastewater Treatment

  • Coagulates and removes suspended solids, organic matter, heavy metals, and pathogens.

  • Widely used in municipal drinking water and sewage treatment plants.

  • Ideal for industrial effluent treatment in textile, dye, chemical, and mining industries.

2. Paper Industry

  • Acts as a retention and sizing agent to improve paper strength and production efficiency.

3. Textile & Dye Industry

  • Removes color, reduces COD and BOD in dyeing wastewater.

4. Oil & Gas Sector

  • Treats oily wastewater and improves water clarity in drilling processes.

5. Agriculture

  • Enhances quality of irrigation water by reducing turbidity and contaminants.

6. Cosmetics & Personal Care (White PAC)

  • Occasionally used as a stabilizer or astringent in cosmetic formulations.

7. Swimming Pools & Recreational Water

  • Clarifies water by coagulating fine particles for easier filtration.

Description

Poly Aluminium Chloride (PAC) is a polymerized compound with the general chemical formula:
[Al₂(OH)nCl₆–n]m

Its composition typically includes:

  • Aluminium Oxide (Al₂O₃): 28–31% (depending on grade)

  • Basicity: 40–90% (indicates the degree of neutralization)

  • Chloride Content (Cl⁻): Varies by formulation

  • Water Solubility: Completely soluble

PAC is available in different grades:

  • White PAC: Food-grade, used for drinking water and cosmetics

  • Yellow PAC: Industrial-grade, used in wastewater and industrial processes

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