Molecular Sieve

Dehydration
May 2, 2020

Molecular sieve zeolites are interesting class of micro porous crystalline inorganic compounds. They have molecular dimensional pores/channels and depending on their composition they may have ion exchange properties also. These materials are thermally stable over a wide range of temperatures. Due to unique properties of zeolites, they find applications in catalytic and separation process and act as hosts for many active agents. Depending on the pore size, each zeolite will discrimination towards molecules entering into it. The effective pore size of each zeolite further depends on the labile cations present in its structure

3A Molecular Sieve

Molecular Sieve Type 3A, the potassium form of the type A crystal structure, is an alkali metal alumino-silicate. Available in spherical and pellets for commercial dehydration of various streams such as cracked gas, propylene, butadiene and acetylene. Type 3A is also used for drying polar liquids such as methanol and ethanol

4A Molecular Sieve

4A molecular sieve is the sodium form of the Type A crystal structure, is an alkali metal alumino-silicate. It’s available in powder, pellets and beads for dehydration and CO2 removal from natural gas, LPG, air sweetening and desulfurizing of natural gas, PSA hydrogen purification, air purification upstream of PSA units and compressors, syngas purification

5A Molecular Sieve

Type 5A is the calcium form of molecular sieves. It will absorb those molecules having a critical diameter of less than 5 angstroms such as H2S, light Mercaptans Methanol, Ethane, and Propane, as well as species adsorbed by 3Å and 4Å

13X Molecular Sieve

Type 13X is a sodium modified molecular sieve, with a pore diameter of ten angstroms. It will adsorb those molecules with a critical diameter of less than 10 angstroms. Such as Chloroform, Carbon Tetrachloride, and Benzene

Oxygen concentrators are popularly used to provide sufficiently high purities of oxygen for medical patients without the need of high-pressure tanks or liquid oxygen. These machines produce their oxygen by using air compression and valving to pass room air through a 13X molecular sieve comprising a container which holds the sieve material as a sandy type of substance