Abstract: This invention relates to a catalyst comprising a mixture of a primary refractory inorganic oxide having dispersed thereon at least one first active component selected from the group consisting of rare earth oxides and a secondary support consisting of zirconia, titania or cerium oxide having dispersed thereon at least one second active component which is a metal oxide, the metal selected from the group consisting of metals which form a stable sulfide said mixture having at least one main catalytic metal selected from the group consisting of platinum, palladium, rhodium, ruthenium and iridium deposited thereon. This invention also relates to a method of manufacturing said catalyst. Finally a method to minimize the formation of H.sub.2 S when automotive exhaust is contacted with a method is also claimed.

Abstract: This invention relates to a catalytic composite and a process for reducing the ignition temperature of diesel soot. The process comprises contacting an exhaust gas from a diesel engine, which exhaust contains diesel soot, with a catalytic composite. The composite comprises a sulfur resistant refractory inorganic oxide selected from the group consisting of titania, zirconia, silica, silica-alumina and alumina which has been treated to be sulfur resistant, i.e. alumina treated with titania, zirconia, etc. which has deposited thereon at least one catalytic element selected from the group consisting of Pt, Pd and Rh. The inorganic oxide may be deposited on ceramic or metallic traps.

Abstract: This invention relates to a process for reducing the ignition temperature of diesel soot. The process comprises contacting a hot exhaust from a diesel engine, which exhaust contains diesel soot, with a catalytic composite. The composite comprises a particulate filter coated with a sulfur resistant refractory inorganic oxide selected from the group consisting of titania, zirconia, silica, silica-alumina and alumina which has been treated to be sulfur resistant, i.e. alumina treated with titania, zirconia, tungsten oxide, etc. This coated ceramic trap has deposited thereon at least one catalytic element or compound selected from the group consisting of Pt, Pd, and Rh.

Abstract: This invention relates to a catalytic composite comprising a mixture of a primary refractory inorganic oxide having dispersed thereon at least one first active component selected from the group consisting of rare earth oxides and a secondary support consisting of zirconia, titania or cerium oxide having dispersed thereon at least one second active component selected from the group consisting of metals which form a stable sulfide said mixture having at least one main catalytic metal selected from the group consisting of platinum, palladium, rhodium, ruthenium and iridium deposited thereon. This invention also relates to a method of manufacturing said catalytic composite. Finally a method to minimize the formation of H.sub.2 S when automotive exhaust is contacted with a catalytic composite is also claimed.

Abstract: A catalytic composite suitable for use in the continuous and simultaneous conversion of carbon monoxide, hydrocarbons, and nitrogen oxides contained in hot gases particularly from hot gases from an internal combustion engine is disclosed. The catalytic composite comprises uranium and a metal selected from the group consisting of platinum, palladium, rhodium, or mixtures thereof.

Abstract: A process for the continuous and simultaneous conversion of carbon monoxide, hydrocarbons and nitrogen oxides contained in hot gases, and in particular from hot exhaust gases from an internal combustion engine, is disclosed. The hot gases are passed in contact with a catalystic composite comprising uranium, rhodium, and platinum and/or palladium dispersed on a porous alumina surface.