Oxygen-deficient, barium-containing perovskites

Details Oxygen-deficient, barium-containing perovskites Oxygen-deficient, barium-containing perovskites

C - Chemistry, Metallurgy

01

F

23/224, 23/279

C01F 11/02 (2006.01) C01B 13/18 (2006.01) C01F 17/00 (2006.01) C01G 29/00 (2006.01) C01G 49/00 (2006.01) C01G 53/00 (2006.01)

Patent

CA 1212517

ABSTRACT OF THE DISCLOSURE A class of oxygen-deficient, barium-con- taining compounds having a perovskite-type structure may be prepared which are of the formula: Ba2MaM'2-aO5+Y if M is a trivalent cation, or Ba3MaM'3-aO[7.5-(a/2)+y] if M is a divalent cation, wherein M is Mg, Ca, Sr, Ba, Sc, Y, La, the lanthanides.of atomic number 58 or greater, Ni, Fe, Cu, Al, Ga, In, Zn, Cd, Hg, Bi, Tl or a mixture thereof, M' is Sb or Bi, a is equal to or greater than O but less than or equal to 1, and if M is trivalent, y is equal to or greater than 0 but less than 1, and if M is divalent, y is equal to or greater than 0 but less than (3+a)/2. Preferably, the compounds herein are of the formula: Ba2MaM'2-aO5+Y where M is La or Sc, a is equal to or greater than 0 but less than or equal to 1 and y is equal to or greater than 0 but less than 1. This class of compounds are readily reoxi- dized and therefore are useful in oxidative dehydro- genation reactions.

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