For professionals involved in water treatment, selecting the correct grade of Polyaluminium Chloride (PAC) is as important as choosing PAC itself. The efficacy of this versatile inorganic polymer coagulant is significantly influenced by its specific chemical properties, primarily its basicity and Aluminum Oxide (Al2O3) content. As a knowledgeable supplier, NINGBO INNO PHARMCHEM CO.,LTD. aims to demystify these grades and guide you in making the optimal purchase decision.

The Science Behind PAC Grades

Polyaluminium Chloride (CAS 1327-41-9) is a polymeric inorganic salt formed by partially hydrolyzing aluminum chloride. The degree of hydrolysis is measured by its 'basicity,' which is essentially the ratio of hydroxyl groups to aluminum atoms. This basicity, along with the concentration of Al2O3, dictates PAC’s performance characteristics:

  • Basicity: Generally ranges from 40% to 95%. Higher basicity indicates a greater degree of polymerization and a higher molecular weight, leading to more effective charge neutralization and bridging. PACs with higher basicity are often more efficient at lower temperatures and at a wider pH range.
  • Al2O3 Content: This indicates the concentration of active aluminum in the product, typically ranging from 28% to 31% for solid products. A higher Al2O3 content generally means a more concentrated product, potentially requiring lower dosages.

Matching PAC Grades to Applications

The diverse properties of PAC allow it to be tailored for specific water treatment challenges:

  • Drinking Water Grade PAC: Typically features higher basicity (e.g., 60-90%) and lower Al2O3 content (around 28-30%), often with very low levels of water insolubles (e.g., ≤ 0.1%). These grades are optimized for producing safe, clear drinking water with minimal impact on pH. When you buy PAC for drinking water, ensure it meets relevant purity standards.
  • Industrial Wastewater Grade PAC: May have a wider range of basicity (e.g., 40-95%) and Al2O3 content (e.g., 28-30%). Higher basicity PACs are preferred for general wastewater treatment, including industrial effluents from textile, paper, and chemical industries, due to their broad applicability and flocculation efficiency. Lower basicity PACs might be used in specific niche applications or where pH control is less critical.
  • White Powder PAC: Often associated with higher purity and drinking water applications, white powder PAC is produced through spray-drying processes, resulting in a fine, easily soluble product.
  • Yellow/Light Yellow/Yellow Powder PAC: These grades might have slightly lower purity or different basicity levels, often suitable for general industrial wastewater treatment.

Where to Buy Polyaluminium Chloride: Partnering with Experts

Navigating these specifications can be complex. NINGBO INNO PHARMCHEM CO.,LTD. is a reliable polyaluminium chloride manufacturer and supplier that can provide expert guidance. We offer a range of PAC products, clearly specifying their grades, basicity, and Al2O3 content. When you contact us to purchase PAC, our technical team will help you select the most appropriate grade based on your water source, treatment objectives, and operational parameters. We ensure competitive polyaluminium chloride prices and consistent quality, making us your ideal partner for all your water treatment chemical needs.