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Ethyl Thiocarbamate / Sodium Diethyl: A Powerful Flotation Collector for Sulfide Ores
Introduction
Ethyl Thiocarbamate, also known as Sodium Diethyl Dithiocarbamate, is a high-performance flotation collector widely used in the mining industry. With exceptional selectivity and strength, it is particularly effective in the beneficiation of sulfide minerals such as copper, lead, and zinc, as well as in the flotation of precious metals like gold and silver. This collector has gained popularity for its fast flotation kinetics, strong collecting power, and minimal environmental impact compared to other sulfur-based reagents.
Description
Chemical Identity & Description
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Product Name: Ethyl Thiocarbamate / Sodium Diethyl Dithiocarbamate
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Chemical Formula: (C₂H₅)₂NCSSNa
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Synonyms: Sodium Diethyldithiocarbamate, DEDTC
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CAS Number: 148-18-5
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Molecular Weight: 179.26 g/mol
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Appearance: Yellowish to amber liquid or solid powder (depending on form)
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Solubility: Fully soluble in water
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Odor: Characteristic, slightly sulfurous
Ethyl Thiocarbamate is typically supplied as a liquid or water-soluble salt, ensuring rapid dispersion in flotation circuits. It enhances the hydrophobic properties of sulfide minerals, allowing for better attachment to air bubbles during flotation.
Technical Specifications
| Property | Specification |
|---|---|
| Purity | ≥ 95% (typical commercial grade) |
| pH (1% Solution) | 9.0 – 11.0 |
| Density (25°C) | 1.00 – 1.10 g/cm³ |
| Solubility in Water | Complete |
| Form | Liquid or crystalline solid |
| Shelf Life | 12 months (stored in original packaging) |
| Packaging | 200 kg drums or 1000 kg IBC containers |
Applications
⛏️ Mining and Mineral Processing
Ethyl Thiocarbamate is primarily used in the flotation of:
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Copper sulfide ores
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Lead and zinc ores
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Polymetallic and complex sulfide ores
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Gold and silver-bearing ores
It acts by forming stable, hydrophobic complexes with metal ions on mineral surfaces, improving recovery rates and concentrate grades even in low pH or high salinity environments.
Advantages
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✅ High Selectivity: Targets desired minerals while minimizing gangue flotation
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✅ Efficient Collector: Requires low dosage for effective flotation performance
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✅ Good Froth Stability: Supports froth formation, enhancing flotation recovery
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✅ Compatible with Other Reagents: Can be blended with xanthates or other thiol collectors
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✅ Lower Environmental Impact: Biodegradable formulation with reduced toxicity
Storage & Handling
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Storage Conditions: Store in cool, dry, and well-ventilated spaces
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Precautionary Measures: Avoid contact with acids and oxidizing agents
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Personal Protection: Use gloves, goggles, and protective clothing
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Disposal: Follow local environmental regulations and SDS guidelines
Conclusion
Ethyl Thiocarbamate / Sodium Diethyl is a versatile and powerful flotation collector designed to optimize the recovery of metal sulfides and precious metals. Its high selectivity, low dosage requirement, and stable frothing ability make it a preferred choice in modern mineral processing operations. Whether used alone or in combination with other reagents, it provides a cost-effective and environmentally friendlier solution for ore beneficiation.
