Procatalyse

Rhone-poulenc Chimie

Rhone-poulenc Specialites Chimiques

Jack Caillod

Gilbert Blanchard

Michel Prigent

Olivier Legendre

Philippe Jaeger

Richard Doziere

GuyNoel Sauvion

Claire Gourlaouen

Guy-Noel Sauvion

Guy-Nool Sauvion

Catalyst compositions well adopted for the oxidation of olefins into .alpha.,.beta.-unsaturated aldehydes, e.g., for the oxidation of propylene into acrolein, comprise a particulate support substrate uniformly coated with 15% to 33% by weight of an adherent layer of a catalytically active phase, such support substrate comprising inert and solid spheres having a diameter ranging from 0.5 to 6 mm, such catalytically active phase comprising a catalytically effective amount of bismuth and iron molybdate, dopant amounts of phosphorus and potassium and, optionally, at least one other catalytically active metal or non-metal, and the phosphorus and the potassium each being present in such catalytically active phase in an atomic quantity ranging from 0.005 to 0.06 per 12 atoms of molybdenum, or of molybdenum plus any tungsten therein.

Catalysts for the gaseous phase oxidation of olefins into

Multiple purpose catalysts adapted for the treatment of internal combustion engine exhaust gases comprise a particulate refractory oxide support, e.g., alumina particles, having an active catalytic phase deposited thereon, said active catalytic phase including zirconium, cerium and platinum, and optionally iridium, rhodium, palladium and other metal values.

Multi-purpose catalyst for vehicular catalytics converters

Multi-purpose catalysts for vehicular catalytic converters

Carbon monoxide is reacted with water vapor and converted into hydrogen and carbon dioxide, in the presence of a thio-resistant catalyst which comprises an active phase deposited onto a support, said active phase comprising molybdenum, vanadium or tungsten, and a cobalt and/or nickel promoter therefor, and said support comprising cerium oxide or zirconium oxide. The reaction mixture advantageously includes carbon monoxide, hydrogen, water and compounds of sulfur, wherefrom hydrogen is selectively produced in increased amounts.

CO+H.sub.2 O catalytic conversions

A ceric oxide composition, the specific surface of which remains essentially stable at elevated temperatures and which is thus well adopted for purposes of catalysis, is comprised of a plurality of solid, porous, finely divided ceric oxide particulates, said ceric oxide particulates advantageously having an effective amount of at least one oxide of another metallic element A intimately dispersed therein as to essentially prevent the coalescence of the micropores thereof.

Ceric oxide particulates having a stable specific surface and a process

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Taverny, France

Jack Caillod