Patent ID: 6143162
Filing Date: 2000-11-07
Classification: A23L,B01D,C01B

Abstract:
Process for separating oxygen from a gas mixture containing oxygen, comprising the step of:reducing oxygen brought in on a cathode into O.sup.2- ions and transferring the O.sup.2- ions into oxygen on an anode by employing a solid-electrolyte electrochemical cell having a homogeneous structure consisting of one or more BIMEVOX derivatives, with dynamic electrodes created ""in situ"" that are reversible and self-adaptive, and at least two current collectors wherein BIMEVOX derivatives are defined by formula(Bi.sub.2-x M.sub.x O.sub.2)(V.sub.1-y M'.sub.y O.sub.z) (I)in which:M represents one or more metals substituting for bismuth, this (or these) being chosen from those having an oxidation number of less than or equal to 3;M' represents one or more elements substituting for vanadium, this (or these) being chosen from those having an oxidation number of less than, equal to or greater than 5, the limiting values of x, y, and therefore z, depending on the nature of the substituting elements M and M'.