Catalyst on silica clad alumina support

Details Catalyst on silica clad alumina support Catalyst on silica clad alumina support

C - Chemistry, Metallurgy

08

F

C08F 4/02 (2006.01) B01J 23/76 (2006.01) B01J 37/00 (2006.01) C08F 4/69 (2006.01) C08F 10/02 (2006.01)

Patent

CA 2750535

The invention concerns catalysts comprising (i) a cladded catalyst support comprising (a) a core which com-prises alumina particles and (b) about 1 to about 40 weight percent silica cladding, based on the weight of the cladded catalyst support, on the surface of the core; the catalyst support having a BET surface area of greater than 20 m2/g and a porosity of at least about 0.2 cc/g; and (ii) 0.1 to 10 weight percent, based on the weight of the catalyst, of catalyti-cally active transition metal on the sur-face of the cladded catalyst support; wherein the catalyst support has a nor-malized sulfur uptake (NSU) of up to 25 ?g/m2. The invention also concerns the production and use of such catalysts.

La présente invention concerne des catalyseurs comprenant (i) un support de catalyseur revêtu comprenant (a) un cur comprenant des particules d'alumine et (b) entre environ 1 et environ 40 % en masse de revêtement de silice, par rapport à la masse du support de catalyseur revêtu, à la surface du cur ; le support de catalyseur présentant une surface BET supérieure à 20 m2/g et une porosité d'au moins environ 0,2 cc/g ; (ii) entre 0,1 et 10 % en masse, par rapport à la masse du catalyseur, d'un métal de transition catalytiquement actif à la surface du support de catalyseur revêtu ; le support de catalyseur présentant une absorption de soufre normalisée (ASN) pouvant atteindre 25 g/m2. La présente invention concerne également la production et l'emploi de tels catalyseurs.

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