3A Molecular sieve

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:

Guangdong Xintao 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:

Guangdong Xintao 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 1-2 mm(10x18 mesh), 2-3 mm(8x12 mesh), 2.5-5 mm(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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