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