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 a Li and Ag exchange zeolite containing 5 to 40% Ag exchange capacity on {HEAD ~ an equivalents basis}, with {TAIL ~ periodic thermal regeneration} of the adsorbent 
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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 a Li and Ag exchange zeolite containing 5 to 40 % Ag exchange capacity on { HEAD ~ an equivalents basis } , with { TAIL ~ periodic thermal regeneration } of the adsorbent
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