Catalyst composition

Claim 2

A SOLID CATALYST COMPOSITION COMPRISING ESSENTIALLY OF A POLYCRYSTALLINE CATALYTICALLY ACTIVE INORGANIC COMPLEX HAVING THE FORMULA:

Claim 3

A composition according to claim 1 wherein M is copper.

Claim 4

A composition according to claim 1 wherein M'' is nickel.

Claim 5

A composition according to claim 1 wherein a is from about 0.025 to about 0.075.

Claim 6

A composition according to claim 1 wherein b is from about 0.5 to about 1.0.

Claim 7

A composition according to claim 1 wherein c is from about 0.5 to about 1.5.

Claim 8

A composition according to claim 1 wherein d is from about 0.5 to about 1.0.

Claim 9

A composition according to claim 7 wherein a is from about 0.025 to about 0.075, b is from about 0.5 to about 1.0, c is from about 0.5 to 1.5, M is copper and M'' is nickel.

Claim 10

A process suitable for producing a catalytically active structure comprising a porous substrate impregnated with a catalytically active metal oxide complex, the process comprising: a. forming an aqueous solution of soluble metal sources thermally decomposable to metal oxides consisting essentially of a lithium source, a cerium source, a metal source M selected from the group consisting of copper and iron and a metal source M'' selected from the group consisting of nickel and cobalt, the molar ratio of lithium to cerium being from 1:1 to 1:100 and the molar ratio of lithium to said M and M'' metals each being from about 2:5 to about 1:200; b. immersing a porous substrate in said solution under reduced pressure for a time sufficient to impregnate the pores thereof; c. drying said impregnated substrate; and d. heating the resuLting impregnated substrate at a temperature of from about 600 to about 850*C for about 0.5 to about 2 hours in an oxygen containing atmosphere, thereby to convert the substrate to a catalytically active structure comprising the porous substrate impregnated with a catalytically active metal oxide complex.

Claim 11

A process suitable for producing a catalytically active structure comprising a porous substrate impregnated with a catalytically active metal oxide complex, the process comprising: a. forming an aqueous solution of soluble metal sources thermally decomposable to metal oxides consisting essentially of a lithium source, a cerium source, a metal source M selected from the group consisting of copper and iron and a metal source M'' selected from the group consisting of nickel and cobalt, the molar ratio of lithium to cerium being from 1:1 to 1:100 and the molar ratio of lithium to said M and M'' metals each being from about 2:5 to about 1:200; b. immersing a porous substrate in said solution under reduced pressure for a time sufficient to impregnate the pores thereof; c. drying said impregnated substrate; and d. heating the resuLting impregnated substrate at a temperature of from about 600 to about 850*C for about 0.5 to about 2 hours in an oxygen containing atmosphere, thereby to convert the substrate to a catalytically active structure comprising the porous substrate impregnated with a catalytically active metal oxide complex.

Claim 12

A process according to claim 9 wherein said metal sources are nitrates of the foregoing metals.

Claim 13

A process according to claim 9 wherein nitric acid is added to said solution prior to immersion of said substrate.

Claim 14

A process according to claim 11 wherein said substrate is a ceramic substrate.

Claim 15

A process according to claim 12 wherein said ceramic is selected from the group consisting of cordierite and mullite.

Claim 16

A catalytic active structure comprising a ceramic substrate relatively uniformly coated with a catalytic complex of the formula: Lia Ceb Mc M''d Ox wherein M is a metal selected from the group consisting of copper and iron, M'' is a metal selected from the group consisting of cobalt and nickel, a is from about 0.01 to about 0.1, b is from about 0.1 to about 1, c is from about 0.25 to about 2.0, d is from about 0.25 to about 1.0 and x varies in direct chemical relationship to the values of a, b, c and d.

Claim 17

A catalytic active structure comprising a ceramic substrate relatively uniformly coated with a catalytic complex of the formula: Lia Ceb Mc M''d Ox wherein M is a metal selected from the group consisting of copper and iron, M'' is a metal selected from the group consisting of cobalt and nickel, a is from about 0.01 to about 0.1, b is from about 0.1 to about 1, c is from about 0.25 to about 2.0, d is from about 0.25 to about 1.0 and x varies in direct chemical relationship to the values of a, b, c and d.

Claim 18

A structure of claim 14 wherein said substrate is selected from the group consisting of cordierite and mullite.

Claim 19

A structure according to claim 14 wherein said substrate is honeycomb shaped having at least 200 cells per square inch.

Claim 20

A structure according to claim 16 wherein said structure is cordierite.

Claim 21

A structure according to claim 16 wherein said structure is mullite.

Claim 22

A structure according to claim 16 wherein in said catalytic complex a is from 0.025 to 0.075, b is from 0.5 to 1.0, c is from 0.5 to 1.5, and d is from 0.5 to 1.0.

Claim 23

A structure according to claim 19 wherein M is copper.

Claim 24

A structure according to claim 20 wherein M'' is nickel.

Claim 25

A structure according to claim 21 wherein said ceramic is cordierite.