Reversible oxygen sorbent compositions

Abstract

High Capacity solid state cyanocobaltate complexes represented by the chemical formula: [(A).sub.a (R.sub.4 N).sub.b ].sup.z+.sub.x/z [Co(CN).sub.n ].sup.x- .multidot.pS where: A is alkali metal atom, alkaline earth metal atom, Zn, Cd or Hg atom; a is any number from 0 to 2.5 each R is independently C.sub.1 -C.sub.1O substituted or unsubstituted alkyl, aryl or aralkyl; or a long chain hydrocarbon polymer b is any number from greater than zero to 3 z is 1, 2 or 3; n is any number from 3 to 5; x is n-2; p is any number from greater than zero to 6; and S is a ligand which is capable of coordinating with [(A).sub.a (R.sub.4 N).sub.b 9 .sup.z+, Co or both. are capable of chemically binding oxygen to form novel oxygen adducts, thereby selectively removing oxygen from an oxygen-containing fluid stream. The bound oxygen may be recovered from the complexes by increasing the temperature or by reducing the partial pressure of O.sub.2 above the adduct.

Dependencies are inferred from the claim text.