Description

Technical Parameters

Specific Application

Ethanol drying; Ethylene drying; Methanol drying; Natural gas dehydration; Propylene drying; Static dehydration of air filled insulated glass units; Static dehydration of gas Butadiene drying; Cracked gas drying etc.

Summary

Molecular Sieve type 3A is an alkali metal alumina-silicate; it is the potassium form of the type A crystal structure. Type 3A has an effective pore opening of about 3 angstroms (0.3nm). This is large enough to allow in moisture, but excludes molecules such as unsaturated hydrocarbons which can potentially form polymers; and this maximizes lifetime when dehydrating such molecules.

Technical Parameter

Model	3A
Color	Light gray
Nominal pore diameter	3 angstroms
Shape	Sphere		Pellet
Diameter (mm)	1.7-2.5 (8*12 mesh)	3.0-5.0 (4*8 mesh)	1.6 (1/16 inch)	3.2 (1/8 inch)
Size ratio up to grade (%)	≥98	≥98	≥96	≥96
Bulk density (g/ml)	≥0.70	≥0.70	≥0.68	≥0.68
Wear ratio (%)	≤0.20	≤0.20	≤0.40	≤0.40
Crushing strength (N)	≥35/piece	≥85/piece	≥30/piece	≥50/piece
Static H₂O adsorption (%)	≥21	≥21	≥21	≥21
Dynamic capacity (%)	≥20	≥20	≥20	≥20
Ethylene adsorption (‰)	≤3.0	≤3.0	≤3.0	≤3.0
Water content (%)	≤1.5	≤1.5	≤1.5	≤1.5
Typical Chemical Formula	0.4K₂O, 0.6Na₂O, Al₂O₃, 2SiO₂, 4.5 H₂O (SiO₂ : Al₂O₃ ≈2)
Typical Application	a) Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien) b) Cracked Gas Drying c) Drying of natural gas, if COS minimization is essential, or a minimum co-adsorption of hydrocarbons is required. d) Drying of highly polar compounds, such as methanol and ethanol e) Drying of liquid alcohol f) Static, (non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled. g) Drying of CNG.




Warranty	a) By National Standard GBT 10504-2008 b) Offer lifetime consultation on problems occurred

Regeneration

Molecular sieve Type 3A can be regenerated by either heating in the case of thermal swing processes; or by lowering the pressure in the case of pressure swing processes.

To remove moisture from a 3A molecular sieve, a temperature of 200-230°C is required. A properly regenerated molecular sieve can give moisture dew points below -60°C.

The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.

Size

3A - Zeolite are available in beads of 1-2mm (10x18 mesh), 2-3mm (8x12 mesh), 2.5-5mm (4x8 mesh) and as powder, and in pellet 1.6mm, 3.2mm.

Attention

To avoid damp and pre-adsorption of organic before running, or must to be reactivated.

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