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). XINGFENG type 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
Typical Chemical Formula
?? Na2O?? Al2O3?? 2.0SiO2 ??4.5H2O
SiO2: Al2O3 ≈2
Size ratio up to grade
Static water adsorption
Static methanol adsorption
Water content, as shipped
1 )Drying and removing of CO2 from natural gas, LPG, air, inert and athmospheric gases, etc.
2 ) Removal of hydrocarbons, ammonia and methanol from
(ammonia syn gas treating)
3 )Special types are used in the air break units of
buses, trucks and locomotives.
4 )Packed in small bags, it may be used simply as a
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
250-280°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
4A - Zeolites 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 1.6”, 3.2”.
To avoid damp and pre-adsorption of organic
before running, or must to be reactivated.
Contact person:Ms.Joy Zhang