Rhone-poulenc Chimie

Societe Francaise Des Produits Pour Catalyse 'procatalyse'

Ste Francaise Des Products Pour Catalyse Pro-catalyse Chez Institut

Ste Francaise Des Produits Pour Catalyse Pro-catalyse Chez Institut

Marc Mercier

Yves Jacquin

Herve Toulhoat

Jean-Claude Plumail

Bernard Pacaud

Marc Curcio

Alumina agglomerates having controlled porosity and excellent mechanical properties, well suited as catalyst supports and adsorbents, are produced by (a) agglomerating an alumina powder prepared by rapidly dehydrating an aluminum hydroxide, (b) aging the agglomerates thus formed in an atmosphere of controlled humidity, (c) impregnating such aged agglomerates with a solution of at least one acid, (d) hydrothermally treating the thus impregnated agglomerates in a confined enclosure, and then (e) drying and calcining the agglomerates thus treated.

Process for making alumina agglomerates

Adsorbent material well adapted for the purification of gases (notably by the PSA and TSA methods) by adsorbing impurities therefrom that are more polar or polarizable than the gases to be purified, e.g., nitrogen, the oxides of carbon and hydrocarbons, comprises a matrix of a type 5A zeolite molecular sieve and a kaolinite clay binder therefor, the clay binder having a concentration of at least 75% by dry weight of kaolinite and a maximum quartz concentration of 20% by dry weight.

5A zeolite/kaolinite adsorbent for gas purification

Attrition resistant agglomerates of active alumina, i.e., agglomerates displaying an attrition resistance of less than 0.3% after aging for 24 hours at 980.degree. C., are produced by establishing a batch of starting material active alumina agglomerates in a confining and protective treatment zone, such starting agglomerates having been impregnated with water or an aqueous acid solution and the confining treatment zone itself being enclosed within an autoclaving assembly as to provide an interspace between the internal wall surfaces of the autoclaving assembly and the exterior wall surfaces of the treatment zone, and hydrothermally treating such impregnated agglomerates at a temperature of at least 80.degree. C. by directing a stream of a hot heat transfer fluid against the exterior wall surfaces of the treatment zone.

Attrition resistant agglomerates of active alumina

Supported catalysts which are made by shaping catalyst carrier, with or without catalyst precursors, into balls, calcining the balls at 300.degree.-1000.degree. C., and crushing the calcined balls to particles whose average size is 0.2-0.8 times the average diameter of the balls. When the precursors are not present during the manufacture, they are added thereafter.

Process for the hydrotreatment of hydrocarbon oil employing catalysts

Alumina, silica or silica-alumina containing catalysts are manufactured by incorporating at least one active element selected from the metals of the groups V, VI and VIII or their compounds to a carrier, and then drying and activating. The carrier or the catalyst is shaped into extrudates and the latter are crushed to coarse particles.

Crushed catalysts containing alumina, silica or silica-alumina, and

Supported catalysts for use in hydrocarbons hydrotreatments are made by shaping catalyst carrier, with or without catalyst precursors, into balls, calcining the balls at 300.degree.-1000.degree. C., and crushing the calcined balls to particles whose average size is 0.2-0.8 times the average diameter of the balls. When the precursors are not present during the manufacture, they are added thereafter.

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Ales, France

Marc Mercier