Catalyst support and process for the preparation thereof

B - Operations – Transporting – 01 – J

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B01J 23/38 (2006.01) B01J 21/12 (2006.01) B01J 37/02 (2006.01) C01B 15/023 (2006.01)

Patent

CA 2696559

An amorphous catalyst support comprising at least a first oxide selected from the group consisting of: silica, germanium oxide, titanium oxide, zirconium oxide or mixtures thereof, preferably silica gel beads or diatomaceous earth; a group 3 metal oxide; and anions in an amount not greater than 10 % by weight of the catalyst support; wherein the group 3 metal oxide is incorporated in the first oxide structure at the molecular level. The catalyst support is prepared by (a) mixing the first oxide, with an anhydrous source of the group 3 metal oxide, and water, at a pH above 11, thus forming a suspension, (b) washing the catalyst support with water, (c) separating the catalyst support from the water, and (d) optionally drying and/or calcining the catalyst support. A catalyst based on such a support has improved catalytic properties.

La présente invention concerne un support de catalyseur amorphe comportant au moins un premier oxyde choisi parmi le groupe constitué de: silice, oxyde de germanium, oxyde de titane, oxyde de zirconium ou leurs mélanges, de préférence des billes de gel de silice ou de la terre de diatomées ; un oxyde métallique de groupe 3 ; et des anions en une quantité égale ou inférieure à 1% en poids du support de catalyseur ; l'oxyde métallique de groupe 3 étant incorporé dans la structure du premier oxyde au niveau moléculaire. Le support de catalyseur est préparé par (a) le mélange du premier oxyde avec une source anhydre de l'oxyde métallique de groupe 3, et de l'eau, à un pH supérieur à 11, formant ainsi une suspension, (b) le lavage du support de catalyseur avec de l'eau, (c) la séparation du support de catalyseur de l'eau, et (d) éventuellement, le séchage et/ou la calcination du support de catalyseur. Un catalyseur ayant un tel support présente des propriétés catalytiques améliorées.

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