3A Molecular Sieve:A kind of alkali-metallic, silicon-aluminum compounds. It could adsorb the molecules which critical diameter is not more than 3 angstroms. Widely used in deep desiccation of cracked petroleum gases, such as ethylene, propylene, butadiene, acetylene and natural gas, and of polar liquid, such as ethanol, LPG and solvent. Also used for de-dewing of vacuum glass.
4A Molecular Sieve : A kind of alkali-metallic, silicon-aluminum compounds. It could adsorb the molecules which critical diameter is not more than 4 angstroms. Used for desiccation of gases and liquids, such as associated gas in oil field and natural gas. It could adsorb H2O, H2S, NH3, SO2, CO2, C2H5OH, C2H6, C2H4 and C3H6.Also it could be used for refining and purification of gases and liquids, such as argon.
5A Molecular Sieve : A kind of alkali-metallic, silicon-aluminum compounds. It could adsorb the molecules which critical diameter is not more than 5 angstroms. It can be used in adsorbing O2, in separating (N2H2)CH4 and in separating N2-O2. Also can be used to separate alkyl-hydrocarbon in petroleum dewax equipments.
13X Molecular Sieve: Used for general air-drying, decontaminating of raw material in air-separating equipments (to take off water and carbon dioxide), and desulfuration of liquid hydrocarbons and natural gases (to take off hydrogen sulfide and mercaptan). Any molecule which could be adsorbed in molecular sieve of type 3A, 4A and 5A, also can be adsorbed in type 13X. In addition, it can adsorb any molecule having much bigger critical diameter, such as any arene and branched hydrocarbon.
