Crushed catalysts containing alumina, silica or silica-alumina, and process for their manufacture
AssigneeSociete Francaise des Produits pour Catalyse Pro-Catalyse
InventorsHerve Toulhoat, Jean-Claude Plumail, Marc Mercier, Yves Jacquin
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Abstract
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.
Claims9
A process for manufacturing a catalyst consisting essentially of at least one alumina, silica or silica-alumina carrier and at least one active element selected from vanadium and the metals of groups VI and VIII and compounds of said metals, said process comprising the steps of shaping said carrier as extrudates, calcining said extrudates at about 300.degree.-1000.degree. C., coarsely crushing said calcined extrudates and recovering resultant crushed particles of average size from 0.05 to 0.5 times the diameter of said calcined extrudates, introducing said at least one active element into said recovered crushed particles, and calcining resultant catalyst particles at about 300.degree.-1000.degree. C.
Dependencies are inferred from the claim text.