high quality molecular sieve 1)10 years professional manufacturer for 3A, 4A,5A, 13X 2)drying,absorbent,cleaning ect. producthigh quality molecular ... for regeneration of molecular sieves include pressure change (as in oxygen concentrators), heating and purging with a carrier gas (as ... ), good for drying polar liquids.4A (pore size 4 Å): Adsorbs H2O, CO2, SO2, H2S, C2H4, C2H6, C3H6, EtOH. Will ...