A 5A molecular sieve is a synthetic zeolite with a pore size of 5 angstroms (0.5 nm). It is primarily used for adsorbing molecules with kinetic diameters smaller than 5Å, such as normal paraffins, water, CO₂, oxygen, and nitrogen. The 5A molecular sieve is widely used in gas separation, drying, and purification applications, particularly in industrial and petrochemical processes.

Technical Parameter:

1. Production Process

Step 1: Raw Material Preparation

• The main raw materials include silica (SiO₂) and alumina (Al₂O₃), mixed with an alkali solution to form a gel-like substance.

Step 2: Zeolite Crystallization

• The mixture is heated under controlled conditions, leading to the formation of 4A zeolite crystals.

Step 3: Ion Exchange Process

• The 4A zeolite undergoes an ion-exchange process, where sodium (Na⁺) ions are replaced with calcium (Ca²⁺) ions.
• This modification increases the pore size from 4Å to 5Å, allowing the adsorption of larger molecules.

Step 4: Drying & Activation

• The zeolite is heated at 450–600°C to remove moisture and activate its adsorption capacity.

Step 5: Shaping & Packaging

• The molecular sieve is processed into beads, pellets, or powders, depending on the application.
• It is packaged in airtight containers to prevent premature moisture absorption.

2. Storage Precautions

To maintain the efficiency and adsorption capacity of 5A molecular sieves, proper storage is necessary:

• Store in Sealed Containers – Prevents exposure to air and moisture.
• Keep in a Dry Environment – High humidity can cause premature saturation.
• Avoid Direct Contact with Water – Can cause degradation and loss of adsorption properties.
• Handle with Care – Prevent mechanical damage that may reduce adsorption efficiency.

3. Applications of 5A Molecular Sieve

1. Gas Separation & Purification

• Oxygen & Nitrogen Separation – Used in PSA (Pressure Swing Adsorption) systems to separate oxygen and nitrogen from air.
• Hydrogen Purification – Removes CO₂, H₂O, and other impurities from hydrogen gas.
• Methane Enrichment – Used to purify methane by removing CO₂ and water.

2. Industrial Drying

• Drying of Gases – Removes moisture from natural gas, hydrogen, and nitrogen streams.
• Solvent Drying – Used in solvent refining and dehydration processes.

3. Petrochemical & Refining

• n-Paraffin Separation – Selectively adsorbs normal paraffins from isoparaffins and branched hydrocarbons in the petrochemical industry.

4. Environmental & Energy Applications

• Desulfurization – Removes sulfur compounds from industrial gas streams.
• Biofuel Purification – Used in the purification of biofuels and renewable energy sources.

5. Insulated Glass Industry

• Prevents moisture condensation inside double-glazed windows, ensuring long-term clarity.