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Industrial Applications of 4A molecular sieves
Table of Contents
Gas & Liquid Deep Drying
- Natural Gas Dehydration: Lowers water dew point below -70°C to prevent freezing and corrosion in cryogenic equipment.
- Air Separation: Removes moisture and CO₂, enhancing oxygen, nitrogen, and argon purity.
- Refrigerant Drying: Eliminates moisture from refrigerants (e.g., R22) to prevent ice blockages and acid corrosion.
Solvent Dehydration: Dehydrates ethanol, isopropanol, etc., refining 96% ethanol to 99%+ purity.
Petrochemicals & Catalysis
- Cracked Gas Purification: Adsorbs acidic gases like H₂S and SO₂, protecting downstream catalysts.
- FCC & Hydrocracking: Acts as a catalyst carrier to enhance selectivity and efficiency.
- Olefins Purification: Selectively adsorbs ethylene and propylene, removing larger molecules like propane.
Environmental Protection & Water Treatment
- Water Softening: Removes Ca²⁺ and Mg²⁺ ions via ion exchange, replacing traditional sulfonated coal.
- Wastewater Treatment: Adsorbs NH₄⁺ and heavy metals (Pb²⁺, Cu²⁺) in industrial effluent.
- Exhaust Gas Purification: Captures SO₂ and CO₂ to meet emission standards.
Consumer Goods & Pharmaceuticals
- Detergent Additive: Replaces sodium tripolyphosphate, reducing water eutrophication.
- Toothpaste Abrasive: Controls fluoride release for better cleaning.
- Pharmaceutical Drying: Provides moisture control for medicine bottles and electronic components.
Other Specialized Applications
- Coating & Paint Dehydration: Improves product stability and prevents clumping.
- Metallurgy: Separates potassium, rubidium, cesium from brine.
- Agricultural Improvement: Adjusts soil water retention and pH balance.
Thanks to its high selectivity, strong regeneration (desorption at 200-350°C), and mechanical durability (attrition rate ≤0.3%), 4A molecular sieve continues to expand in green chemistry and emerging fields like fuel cells and electronic drying.