... gas, methane gas, refrigerants,liquids. Properties: Pore size of 3A molecular sieve , mainly for absorbing water, does not ... best choice of the desiccant for profound drying, refining and polymerizing gas and liquid in petroleum and chemical industry. ... cracked gas, ethylene, acetylene, propylene and butadiene. (6) Drying of unsaturated hydrocarbons (e.g. ethylene, propylene, butadien) (7) Static ...