Bulk Molecular Sieves 4A | 2 bead sizes | multi-format

Molecular Sieve 4A

The 4A molecular sieve is a synthetic adsorbent material with a microporous crystalline structure, characterized by a pore diameter of 4 Å (0.4 nm). It is specifically designed for the drying of liquids and gases and is used in industrial applications where long adsorption cycles and high selectivity are required.

Technical Characteristics

• Type: A LTA – 4A Molecular Sieve
• Pore diameter: 4 Å (0.4 nm)
• Chemical base: synthetic crystalline aluminosilicate with regular microporous structure
• Properties: odorless, non-toxic, non-corrosive, chemically inert, highly selective adsorbent, regenerable by heating
• Available particle size: 2.5–5 mm available in all packaging options with ready stock | 1.6–2.5 mm available in the 135 kg steel drum and big bags, on request

Indicative Technical Table

Parameter	1.6–2.5 mm	2.5–5.0 mm
Nominal particle size range (mm)	1.6–2.5	2.5–5.0
Approximate mesh size	8 × 12	4 × 8
Bulk density (g/L)	725–795	725–795
Abrasion loss (% w/w) max	0.2	0.2
Crushing strength (N/bead) min	25	50
Residual moisture as supplied (% w/w) max	1.0	1.0
H₂O adsorption capacity at 20 °C, 55% RH (% w/w) min	21.5	21.5

*Indicative values under laboratory conditions. Actual performance may vary depending on system configuration, airflow and the container used.

Main Areas of Application

• Industrial production and processes: drying of organic liquids (solvents, oils, gasoline and other saturated hydrocarbons) and technical gases (H₂, N₂, He, Ar), with removal of CO₂, H₂O and SO₂.
• Drying systems: selective adsorption and purification of gases and air; also suitable for gas treatment in drying columns and industrial storage systems.
• Laboratories and quality control / analysis: drying and purification of gases and test environments with controlled humidity; vacuum generation in thermal containers and sorption pumps.

Packaging and Availability

The availability of multiple formats from ready stock allows quantities to be adapted to actual operational and industrial requirements, ensuring flexible inventory management.

• Sealed polyethylene bottles and canisters (1 and 5 kg): suitable for application testing and frequent reorders.
• Sealed polyethylene drums: 15, 20, 25 and 30 kg.
• 135 kg steel drum: available with 2.5–5 mm particle size from ready stock and 1.6–2.5 mm on request.
• Big bags: for large-volume industrial supplies.

Safety and Compliance

The 4A molecular sieve complies with European regulations on non-toxicity. The product, new and unused, does not contain significant quantities of substances subject to occupational exposure limits.

Pricing and Custom Orders

The indicated price refers to the selected quantity on the product page and includes VAT.
For recurring supplies, large quantities or specific requirements, a custom quotation can be requested at info@silica-gel.it.