Xenon and {HEAD ~ krypton} are recovered from 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 {TAIL ~ periodic thermal regeneration} of the adsorbent 
Xenon and { HEAD ~ krypton } are recovered from 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 { TAIL ~ periodic thermal regeneration } of the adsorbent
OTH OTH HEAD HEAD HEAD HEAD HEAD 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH