... properties; used widely in industry 1. Performance characteristics:4A molecular sieve's aperture is 4A,it adsorbs water, methanol, ethanol, hydrogen sulfide ... , ethylene, propylene, and does not adsorb any molecular larger than 4A(including propane), the choice to water adsorption properties is higher ... produce in accordance with HG/T2524-93 standard. Molecular sieve 4A