Sodium Sulfide Bulk — Sulfur removal

Description

1. Product Overview

Sodium Sulfide Bulk is a high-efficacy inorganic salt engineered specifically for industrial sulfur elimination and metal precipitation processes. Its primary industrial use lies in the treatment of heavy metal-laden wastewater, flue gas desulfurization, and hydrometallurgical sulfur separation. The key value proposition is a demonstrably higher sulfur anion reactivity versus commodity-grade alternatives, enabling faster reaction kinetics and lower overall chemical consumption. Strategically, securing reliable Sodium Sulfide supply mitigates environmental compliance risk and reduces total cost of ownership for smelters, tanneries, and chemical processors operating under tightening global discharge regulations.

2. Key Specifications & Technical Characteristics

• Chemical composition: Na₂S (Sodium Sulfide) with controlled iron content <10 ppm to prevent discoloration in downstream applications

• Purity level: Standard 60% min. (technical grade) / “Low-Sulfide” variant 62%±0.5% for high-efficiency sulfur removal

• Physical characteristics:

  • Form: Red flake (iron-stabilized) or yellow flake (low-iron)

  • Color: Light yellow to red-brown (iron content dependent)

  • Particle size: 10–30 mm flakes (uniform, minimal fines)

  • Bulk density: 0.8–1.1 g/cm³

• Packaging options: 25 kg net PP woven bags with PE liner; 1 MT supersacks; bulk tanker (dry pneumatic) for large continuous processes

• Shelf life: 12 months when stored in cool, dry, sealed conditions (hygroscopic — protect from moisture and CO₂)

3. Core Industrial Applications

• Primary industries: Mining & hydrometallurgy, leather processing (liming/unhairing), water treatment (heavy metal precipitation), pulp & paper (sulfidity adjustment), textile dyeing (sulfur dye reduction)

• Specific operational use cases:

  • Mining: Selective removal of arsenic, mercury, and copper from pregnant leach solutions

  • Wastewater: Precipitation of divalent metals (Cd²⁺, Pb²⁺, Ni²⁺, Cu²⁺) as insoluble sulfides below 0.1 ppm

  • Leather: Controlled unhairing with lower sludge volume than lime-based systems

• Why superior: Higher sulfide ion activity means lower dosage (15–20% less than standard 60% flakes), faster settling of metal sulfides (reduced clarifier residence time), and less H₂S off-gassing risk due to uniform dissolution kinetics.

4. Competitive Advantages

• Quality consistency: Batch-to-batch purity variation ≤0.5% — validated by third-party ICP-OES analysis certificates included per shipment

• Supply reliability: Dedicated dry-pneumatic loading lines for bulk trucks; no cross-contamination with chlorides or caustics

• Logistics capability: Warehouse hubs in Rotterdam, Houston, and Singapore for 5-day dispatch to major industrial corridors

• Price competitiveness: Direct-from-reactor pricing (no trader markups) with volume-based monthly rebates above 500 MT

• Sustainability: By-product sulfur from natural gas sweetening is repurposed — ISO 14001 certified facility with zero liquid discharge

• Technical support: SDS, safe handling protocols, reaction yield calculators, and on-call process engineering support

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 20 MT (bulk lot)