Molecular sieve type 4A is an alkali alumino
silicate; it is the sodium form of the Type A crystal
structure. 4A molecular sieve has an effective pore
opening of about 4 angstroms (0.4nm). 4A molecular
sieve will adsorb most molecules with a kinetic diameter
of less than 4 angstroms and exclude those larger. Such
adsorbable molecules include simple gas molecules such as
oxygen, nitrogen, carbon dioxyde and straight chain
hydrocarbons
Branched chain hydrocarbons and aromatics are
excluded
Applications:
Drying and removing of CO2 from natural gas, LPG,
air, inert and athmospheric gases
Removal of hydrocarbons, ammonia and methanol
from gas streams
(ammonia syn gas treating)
Special types are used in the air break units of
buses, trucks and locomotives
Packed in small bags, it may be used simply as a
packaging desiccant
Regeneration:
Molecular sieve Type 4A 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 4A molecular sieve, a
temperature of ******0°C is required. A properly
regenerated molecular sieve can give moisture dew
points below ***0°C.
The outlet concentrations on a pressure swing
process will depend on the gas present, and on the
conditions of the process
4A - zeolites are available in beads of **2 mm,
(*0 x *8 mesh) **3 mm, (8 x *2 mesh), 2.**5 mm, (4 x
8 mesh) and as powder, and in pellet 1.6, 3.2
Packaging: *0kg or *5kg carton box, inside bag vacuum
packing. Or **0 to **0kg iron drum, inside bag vacuum
packing
Customer's request is welcomed
Attention: to avoid damp and pre-adsorption of
organic before running, or must to be reactivated
