(US5306411-A)      The membrane comprises a mixed metal oxide having a perovskite structure of formula AsA'tBuB'vB"wOx, opt. with an electroconductive phase and an O ion conductive phase. A is a lanthanide, Y or their mixt., A' is an alkaline earth metal, B is Fe, B' is Cr and/or Ti, B" is Mn, Co, V, Ni, Cu or their mixt., S/t = 0.01-1000, u = 0.01-1, v = 0.01-1, w = 0-1 and x is a number that satisfies the valencies of the constituent components.    The electroconductive phase is Au, Ag, Pt, Pd, Ra, Ru, Bi2O3, a Pd-In oxide mixt., etc., and the O ion conductive phase is yttria or calcia stabilised ZrO2, ceria or Bi2O2, etc..    USE -   Used in an electrochemical reactor (claimed), which facilitates the transfer of oxygen. Dehydrogenating processes achieve high conversion to unsatd. hydrocarbons combined with low rates of competing cracking and coking reactions.    (US5693212-A)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates.    (US5744015-A)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates.    (CN1221811-A)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates. @(49pp Dwg.No.1/13)@    (CN1221812-A)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates. @(49pp Dwg.No.1/13)@    (CN1224080-A)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates. @(49pp Dwg.No.1/13)@    (CN1224081-A)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates. @(49pp Dwg.No.1/13)@    (CN1227976-A)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates. @(49pp Dwg.No.1/13)@    (CN1227977-A)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates. @(49pp Dwg.No.1/13)@    (US6019885-A)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates. @(49pp Dwg.No.1/13)@    (JP3129451-B2)      Solid membrane comprises a mixed metal oxide of perovskite structure comprising: a lanthanide and/or Y; alkaline earth metal(s); Fe; and Ti or TiCr. Mn and/or Co may also be present.    A pref. oxide material contains La, Sr, Fe, Cr and Co; an example is (La)0.2(Sr)0.8(Fe)0.8 (Cr)0.1(Co)0.1(O)x. Cell element comprises O-ion conducting membrane with a (catalytic) conductive coating on one or both surfaces. A specific catalyst used is an S-reducing catalyst.    USE/ADVANTAGE -   Used in fuel cells, hydrocarbon conversion cells, aromatic substitution cells and cells for removal of pollutant gases in which O2 is required to be transported across a membrane from an O2-contg. gas to an O2-consuming gas (claimed). Membrane provides enhanced O-ion transport efficiency and improved cell efficiency and conversion rates. @(49pp Dwg.No.1/13)@