Raw Material Chemical Product Zeolite Molecular Sieve 3A for Adsorption

Molecular Sieve type 3A is an alkali metal alumino-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 inmoisture, but excludes molecules such as unsaturated hydrocarbons which can potentially form polymers; and this maximizes lifetime when dehydrating such molecules.Typical Chemical Formula
0.4K2O0.6Na2OAl2O32.OSiO24.5H2O
SiO2: Al2O3≈2

Technical Parameter

Item

Unit

Technical data

Shape

Pellet

Sphere

Diameter

mm

1.5-1.7

3.0-3.3

1.7-2.5

3.0-5.0

Size ratio up to grade

%

≥98

≥98

≥98

≥98

Bulk density

g/ml

≥0.65

≥0.65

≥0.70

≥0.70

Wear ratio

%

≤0.20

≤0.25

≤0.10

≤0.10

Crushing strength

N

≥45/cm

≥60/cm

≥30/p

≥70/p

Static water adsorption

%

≥20

≥20

≥20

≥20

Ethylene adsorption

%

≤3.0

≤3.0

≤3.0

≤3.0

Water content, as shipped

%

≤1.5

≤1.5

≤1.5

≤1.5

Typical Application
Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien)Cracked Gas Drying
Drying of natural gas, if COS minimization is essential, ora minimum co-adsorption of hydrocarbons is required.
Drying of highly polar compounds, such as methanol and ethanol
Drying of liquid alcoholStatic, (non-regenerative) dehydration of insulating glass units, whether air filled or gas-filled.
Drying of refrigerants

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 -100°C.
The outlet concentrations on a pressure swing process will depend on the gas present, and on the conditions of the process.

Size
3A - Zeolitesare 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 1.6", 3.2".

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