Process for the purification of permanent gases using chabazite adsorbents

摘要

Thoroughly dehydrated, certain forms of chabazite have improved utility for purifying bulk gases. Compared to conventional molecular sieves, these chabazites have improved properties for removing low levels of gas contaminants having larger heats of adsorption than the bulk component. Also, the small pore chabazite can remove weakly interacting adsorbates from bulk gases having kinetic diameters which exceed that of the pore opening. This discovery of the intrinsic properties of polyvalent chabazites expands the range of contaminant gases which can be removed from bulk gases economically using standard adsorption processes, e.g. using these adsorbents it is possible to remove trace nitrogen from argon.