Process for the preparation of a catalyst support, catalyst...

Details Process for the preparation of a catalyst support, catalyst... Process for the preparation of a catalyst support, catalyst...

C - Chemistry, Metallurgy

08

F

C08F 4/02 (2006.01) B01J 21/12 (2006.01) B01J 27/16 (2006.01) B01J 35/10 (2006.01) B01J 37/03 (2006.01) C08F 4/78 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2162915

Process for the production of a support containing silica and at least one component chosen among alumina and aluminium phosphate, consisting of mixing an alcohol, water, a silicon alcoholate and an acid in such conditions that the gelification or precipitation of silica is avoided, adding an acid solution of an aluminium compound and/or a solution of a phosphate ion source, adding a gelling agent, collecting a gel which is washed with water and then with an organic liquid, and drying thereafter the gel by atomizing it until a powder is formed, whereafter the powder is calcinated. Olefin polymerization in the presence of a chromium-containing catalyst on the afore-mentioned support.

Procédé pour la fabrication d'un support contentant de la silice et au moins un constituant choisi parmi l'alumine et le phosphate d'aluminium, selon lequel on mélange un alcool, de l'eau, un alcoolate de silicium et un acide dans des conditions telles qu'on évite une gélification ou précipitation de silice, on y ajoute une solution acide d'un composé d'aluminium et/ou une solution d'une source d'ions phosphates, on y ajoute un agent gélifiant, on recueille un gel que l'on soumet à un lavage à l'eau et ensuite au moyen d'un liquide organique, puis on sèche le gel par atomisation jusqu'à l'obtention d'une poudre, et on calcine la poudre. Polymérisation d'oléfines en présence d'un catalyseur contenant du chrome sur un support tel que décrit ci-dessus.

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