Rhone-poulenc Chimie

Rhone-poulenc Specialites Chimiques

Patrice Nortier

Thierry Chopin

Eric Quemere

Jean-Luc Schuppiser

Thierry Dupin

Bertrand Latourrette

Jean-Pierre Brunelle

Magali Knipper

Christian Segaud

Francois Garreau

Multilobar shaped catalyst particulates, e.g., tri- or quadrilobar particulates, well adapted for the catalytic conversion of gases containing compounds of sulfur, e.g. SO.sub.2, H.sub.2 S, COS and/or CS.sub.2, by the Claus reaction and/or by hydrolysis, are comprised of a catalytically effective amount of values catalytically active in the Claus reaction and/or reactions entailing hydrolysis of organosulfur compounds.

Multilobar catalysts for the conversion of sulfur containing gaseous

Shaped articles having improved mechanical properties, e.g., stronger catalysts and catalyst supports, are produced by shaping a mass of particulate material, e.g., ceramic powder, into the form of the desired final article, the particulate material including a microbially produced poly-saccharide compound, and then consolidating the shaped article by heat treating same, e.g., to sintering or calcination temperatures.

Mechanically improved shaped articles

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

The desulfurization of industrial gases by the catalytic conversion of contaminating sulfur values therein, comprising, e.g., either Claus process or hydrolysis of organosulfur compounds, is carried out in the presence of an effective amount of a cerium oxide-based catalyst.

CeO catalytic desulfurization of industrial gases

Durable, aging-resistant alumina-based catalyst carriers having improved mechanical strength are facilely prepared by (i) impregnating an alumina-based catalyst carrier with an aqueous solution of a quaternary ammonium silicate, (ii) drying said impregnated carrier, and (iii) calcining said dried carrier.

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Romainville, France

Patrice Nortier