3A Molecular sieve, also known as KA molecular sieve,
with a aperture of about 3 angstroms, can be used for drying of
gases and liquids as well as the dewatering of hydrocarbons.It is
extensively used for the deep drying of petroleum, cracked gases,
ethane, propene and natural gases, the drying of the air in hollow
glass,and the dying of refrigerant as well.
4 A Molecular sieve is suitable for the drying of gas and liquid,
with a aperture of about 4 angstroms. It adsorbs such gases as
H2O, NH3, H2S, CO2, SO2, CO, methyl chloride(H3CCl), methyl bromide
(H3CBr), acetylene(H2C2), ethane(H6C2), ethene(H4C2), propylene(H6C3).
It is widely used in the drying of oil field associated gas.
and natural gas. It is also used to prevent the condensation of
vacuum glass.
The aperture of 5A molecular sieve, generally called as calcium
molecular sieve, is about 5 angstroms. Besides the functions of 3A
and 4A, 5A also has the function of adsorbing normal-hydrocarbons
of C3-C4, ethane chloride, ethane bromide, butanol, etc. It can
be used to adsorb the moisture, carbon dioxide and some organic
gases in the oxygen- "making
" "industry.
"