Aluminium Sulfate Al₂(SO₄)₃ — Coagulant

Description

1. Product Overview

Aluminium Sulfate (Al₂(SO₄)₃) is a high-performance inorganic coagulant essential for potable water treatment, wastewater purification, and industrial process applications. Its primary industrial use is the destabilization and aggregation of suspended particles, colloids, and organic matter, enabling efficient clarification and filtration. The key value proposition lies in its superior turbidity removal, rapid floc formation, and cost-efficient dosage requirements. As water scarcity and stringent environmental regulations intensify globally, securing a reliable supply of high-purity Aluminium Sulfate is a strategically critical component for municipal utilities and industrial operators seeking operational resilience and regulatory compliance.

2. Key Specifications & Technical Characteristics

• Chemical composition: Aluminium Sulfate — Al₂(SO₄)₃ · nH₂O (typical n=14–18)

• Purity level (as Al₂O₃): 15.5% – 17.0% (industrial grade); 17.0%+ (high-purity / drinking water grade)

• Iron (Fe) content: ≤0.2% (low-iron grade); ≤0.02% (ultra-low-iron for high-color water)

• Insoluble matter: ≤0.15%

• Physical form: White or off-white granular, powder, or crushed lump

• Particle size: 0–15 mm (standard); 0–2 mm (rapid dissolution grade)

• Bulk density: 0.85 – 1.10 g/cm³ (loose); 1.10 – 1.30 g/cm³ (packed)

• pH of 1% solution: 2.9 – 3.3

• Packaging options: 25 kg / 50 kg multi-wall kraft bags with PE liner; 1 MT big bags; bulk tanker (dry powder)

• Shelf life: 24 months when stored in dry, covered conditions, away from moisture and strong alkalis

3. Core Industrial Applications

• Municipal drinking water treatment: Primary coagulant for surface water and groundwater. Outperforms organic polymers and ferric salts by producing larger, faster-settling flocs with lower residual aluminum levels, reducing post-filtration polishing costs.

• Industrial wastewater treatment: Used in pulp & paper, textile, petrochemical, and food & beverage sectors for phosphorus removal, suspended solids reduction, and color removal. Provides a broader effective pH range (5.5–8.0) compared to ferric chloride, minimizing corrosion on steel equipment.

• Paper manufacturing (internal sizing): Reacts with rosin sizing agents to create hydrophobic paper surfaces. Preferred over alum substitutes for its consistent ionic charge density, improving retention of fines and fillers.

• Construction & soil stabilization: Accelerates setting in cementitious grouts and reduces swelling potential in clay-rich soils. Lower transport cost per reactive equivalent versus liquid coagulants.

Efficiency advantage: Achieves target turbidity (e.g., <1 NTU) with 15–25% lower dosage than competing polyaluminium chlorides (PAC) in neutral-pH waters.

4. Competitive Advantages

• Quality consistency: Batch-to-batch Al₂O₃ content variation <±0.2%, verified via ISO 9001:2025-certified lab with ICP-OES testing. Certificate of Analysis (CoA) included per shipment.

• Supply reliability: Multiple upstream alumina hydrate sources and geographically distributed production nodes (Asia, Middle East, Europe) — mitigating geopolitical and logistics disruption risk.

• Logistics capability: Dedicated export handling for moisture-sensitive powders (low-humidity container desiccants, liner bags for bulk vessels). Average on-time in-full (OTIF) delivery rate >97%.

• Price competitiveness: Direct sourcing of sulfuric acid and bauxite/alumina hydrate removes intermediary margins. Transparent index-linked or fixed-volume contracts with quarterly pricing adjustments.

• Environmental & safety benefits: Low-iron, low-heavy-metal formulation (<0.0005% As, Pb, Cd) meets EPA, EU Drinking Water Directive, and WHO guidelines. Non-flammable, non-oxidizing — reduces warehouse classification complexity.

• Technical support: Process engineering team available for jar testing, dosage optimization, and polymer-coagulant compatibility audits.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ):

  • 20 MT (palletized bags or big bags)

  • 40 MT (loose bulk container stuffing)

• Loading capacity per 20-foot dry container:

  • 25 kg bags palletized: 20 – 22 MT

  • 1 MT big bags (stacked): 20 – 24 MT

  • Bulk powder in flexitainer or liner bag: Up to 26 MT (depending on density)

• Lead time: 14–21 days ex-works or FOB port of loading

• Incoterms offered: EXW, FOB, CIF, CFR

• Compliance documentation: CoA, MSDS (24 languages), Bill of Lading, Packing List, Commercial Invoice, Origin Certificate (if required)