Procatalyse

Rhone-poulenc Chimie

Francois Garreau

Gilbert Blanchard

Michel Prigent

Philippe Courty

Thierry Chopin

Jean-Luc Schuppiser

Magali Knipper

Patrice Nortier

Richard Dozieres

Thermally stable, sulfur-resistant catalysts for the conversion of exhaust gases from internal combustion engines includes an inert, rigid support substrate, e.g., a cellular monolith, coated with a layer of porouse material, the porous material containing alumina, at least one rare earth oxide, and a spinel type compound having a specific surface of at least 50 m.sup.2 /g, and the support substrate having an effective amount of a catalytically active phase impregnated onto the porous coating thereof.

Catalyst supports/catalysts for the treatment of vehicular exhaust gases

Improvedly time-stable catalysts adopted for the treatment of internal combustion engine exhaust gases include a monolithic catalyst support impregnated with a plurality of catalytically active phases, one section of the support being impregnated with a first catalytically active phase and remaining section of the support being impregnated with a second catalytically active phase.

Catalyst for the conversion of vehicular exhaust gases and process for

Monolithic catalyst substrates are more adherently coated with at least one oxide layer, by including in the coating composition a gum or biogum, preferably xanthan gum.

Catalyst supports and process for their preparation

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Paris, France

Francois Garreau