Engelhard Minerals & Chemicals Corporation

George R Pond

Saul G Hindin

Catalysts having good high temperature stability which are particularly useful for selected high temperature reactions are disclosed as are methods for their preparation and use. The catalytically-active materials include platinum group metal deposited on a catalytic slip or composite which contains a mixture of alumina, selected VIB metal oxides, and a metallic oxide or oxide mixture wherein the metal or metals are selected IIA, IVA, and IIA-IVA mixtures, selected IIA and IVB mixtures and selected IVA and IVB mixtures. The slips or carrier compositions are calcined at a temperature of at least 500.degree. C. before deposition of platinum group metal and characterized by having a surface area of at least 20 m.sup.2 /g after calcination at a temperature of 1200.degree. C. for 2 hours.

Method for the combustion of carbonaceous fuels utilizing high

Catalysts having good high temperature stability which are particularly used for selected high temperature reactions are disclosed as are methods for their preparation and use. The catalytically-active materials include platinum group metal deposited on a catalyst slip or composite which contains a mixture of alumina, a rare earth metal oxide, and a mixture of metallic oxides of selected IIA and IVA metals and selected VIB metals. The slips or carrier compositions are calcined at a temperature of at least 500.degree. C. before deposition of platinum group metal and characterized by having a surface area of at least 20 m.sup.2 /g after calcination at a temperature of 1200.degree. C. for 2 hours.

High temperature stable catalyst composition and method for its

Catalysts having good high temperature stability which are particularly useful for selected high temperature reactions are disclosed as are methods for their preparation and use. The catalytically-active materials include platinum group metal deposited on a catalytic slip or composite which contains a mixture of alumina, selected VIB metal oxides, and a metallic oxide or oxide mixture wherein the metal or metals are selected IIA, IVA, and IIA-IVA mixtures, selected IIA and IVB mixtures and selected IVA and IVB mixtures. The slips or carrier compositions are calcined at a temperature of at least 500.degree.C. before deposition of platinum group metal and characterized by having a surface area of at least 20 m.sup.2 g after calcination at a temperature of 1200.degree.C. for two hours.

Compositions and methods for high temperature stable catalysts

Catalysts having good high temperature stability which are particularly useful for selected high temperature reactions are disclosed as are methods for their preparation and use. The catalytically-active materials include platinum group metal deposited on a catalytic slip or composite which contains a mixture of alumina, a rare earth metal oxide, and a mixture of metallic oxides of selected IIA and IVA metals and selected VIB metals. The slips or carrier compositions are calcined at a temperature of at least 500.degree.C. before deposition of platinum group metal and characterized by having a surface area of at least 20 m.sup.2 /g after calcination at a temperature of 1200.degree.C. for two hours.

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Elizabeth, NJ, United States of America

George R Pond