Xenon and krypton are recovered from oxygen containing gas, typically derived from liquid oxygen bottoms in a cryogenic air separation plant, by selective adsorption on {TAIL ~ a Li and Ag exchange zeolite} containing 5 to 40% Ag exchange capacity on {HEAD ~ an equivalents basis}, with periodic thermal regeneration of the adsorbent 
Xenon and krypton are recovered from oxygen containing gas , typically derived from liquid oxygen bottoms in a cryogenic air separation plant , by selective adsorption on { TAIL ~ a Li and Ag exchange zeolite } containing 5 to 40 % Ag exchange capacity on { HEAD ~ an equivalents basis } , with periodic thermal regeneration of the adsorbent
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH