Molecular Sieve 4A
A 4A molecular sieve is a synthetic zeolite with a pore size of 4 angstroms (0.4 nm). It is primarily used for adsorbing water, CO₂, and other polar molecules while excluding larger molecules. 4A molecular sieves are widely applied in gas drying, petrochemical refining, and industrial processes where moisture removal is critical.
Technical Data:
| Model | 4A | |||
| Color | Light gray | |||
| Nominal pore diametar | 4angstroms | |||
| Shape | Sphere | Pellet | ||
| Diamater（mm） | 1.7-2.5（8*12mesh） | 3.0-5.0（4*8mesh） | 1.6（1/16inch） | 3.2（1/8inch） |
| Size ratio up to grade(wt%） | ≥98 | ≥98 | ≥98 | ≥98 |
| Bulk density （kg/m³） | ≥660 | ≥660 | ≥640 | ≥620 |
| Abrasion（wt%） | ≤0.20 | ≤0.20 | ≤0.25 | ≤0.25 |
| Crush strength (N） | ≥30/piece | ≥80/piece | ≥30/piece | ≥50/piece |
| Water adsorption (wt%） | ≥22 | ≥22 | ≥22 | ≥22 |
| Moisture residual (wt%） | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
| Typical Application |
- Used in the purification and generation of agron - Used in the regeneration and drying of transformer oil - Used to dry and purify ammonia gas and methane - Used in instrumental air drying - Used in the removal of carbon dioxide from the cracked gas - Used to dry liquefied natural gas and liquefied petroleum gas - Help to purify gas for catalyst regeneration |
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1. Production Process
The manufacturing of 4A molecular sieves follows a structured process:
Step 1: Raw Material Preparation
- The key raw materials are silica (SiO₂) and alumina (Al₂O₃), mixed with an alkali solution to form a gel.
Step 2: Zeolite Crystallization
- The mixture is heated under controlled conditions, allowing zeolite 4A crystals to form.
Step 3: Filtration & Washing
- The crystalline material is filtered, washed, and purified to remove impurities.
Step 4: Drying & Activation
- The material is dried at high temperatures (450–600°C) to remove any remaining moisture, enhancing adsorption properties.
Step 5: Shaping & Packaging
- The sieves are shaped into beads, pellets, or powders, depending on the application.
- They are then packaged in airtight containers to prevent premature moisture adsorption.
2. Storage Precautions
To maintain the efficiency of 4A molecular sieves, proper storage is essential:
- Keep in Sealed Containers – Exposure to air can cause premature saturation.
- Store in a Dry Area – Prevents unintentional moisture absorption.
- Avoid Direct Contact with Water – Water exposure can lead to structural degradation.
- Handle with Care – Protect from mechanical damage to maintain adsorption efficiency.
3. Applications of 4A Molecular Sieve
1. Industrial & Gas Drying
- Used in natural gas, LPG, hydrogen, oxygen, and nitrogen drying.
- Essential for removing moisture from air separation units.
2. Petrochemical & Refining
- Helps in the dehydration of hydrocarbon streams and solvent purification.
- Used in desulfurization and purification of chemical products.
3. Pharmaceutical & Chemical Industry
- Maintains dry environments for medicine and chemical storage.
4. Insulated Glass Industry
- Prevents condensation inside double-glazed windows by adsorbing moisture.
5. Household & Consumer Products
- Used in detergents as a water softener to replace phosphates.
- Prevents moisture damage in electronics and food packaging.
H.S.Code: 3824999999
CAS No.: 70955-01-0
Place of Origin: China
Price: US $1680.00-$1880.00 / Ton, 1 Ton Min. Order
Minimum Order Quantity: 1000KG
Packaging: 25KG/bag
Delivery Time: within 7-10 days after received value payment
Payment Terms: T/T or L/C or cash
Supply Ability: 8,000MT per year
