4 angstroms Molecular Sieve is an alkali alumina silicate. It is the sodium form of the Type A crystal structure. 4A molecular sieve has an effective pore opening of about 4 angstroms (0.4 nm). It can be applied for deep dehydration and drying of air, natural gas, alkanes, refrigerants, organic solvents, and other gases and liquids. Purification of argon molecular sieves also can be used in the adsorption of methanol, hydrogen sulfide, carbon dioxide, sulfur dioxide, ethylene, propylene, etc., and desert in the paint, dye, and coating industry. We are a molecular sieve, manufacturer and supplier in China, welcome to contact our factory.