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US 4,048,113 AGranted
Catalytic combustion mass
AssigneeSociete Lyonnaise des Applications Catalytiques
InventorRoger Paul Pierre Risse
Life of this patent
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Abstract
Contact mass for heterogeneous catalysis, characterized in that it comprises a support of alumina fibers having a large specific surface and good thermal stability, on which is deposited a catalyst comprising at least one element chosen from metals of crude platinum belonging to group VIII of the periodic table of elements, a gas supply device being provided which allows appropriate distribution of the combustible gas.
Claims6
A contact mass for heterogeneous catalysts which comprises:
- a sheet having a thickness of 5 to 20 mm of alumina fibers of a mean diameter of the order of 3 microns with a specific surface area of about 120 to 150 m.sup.2 /g and having a decrease in specific surface area of only 11 to 15% upon heating to 700.degree. C
- a coating of platinum catalyst on said fibers;
- a layer of mineral wool in contact with said sheet and capable of withstanding a surface temperature of at least 500.degree. C.
A contact mass for heterogeneous catalysts which comprises:
- a sheet having a thickness of 5 to 20 mm of alumina fibers of a mean diameter of the order of 3 microns with a specific surface area of about 120 to 150 m.sup.2 /g and having a decrease in specific surface area of only 11 to 15% upon heating to 700.degree. C;
- a coating of a catalyst of a platinum group metal on said fibers;
- a layer of mineral wool in contact with said sheet and capable of withstanding a surface temperature of at least 500.degree. C.
Dependencies are inferred from the claim text.