Supported catalyst comprising delta- or theta-modified...

B - Operations – Transporting – 01 – J

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B01J 21/04 (2006.01) B01J 23/36 (2006.01) B01J 32/00 (2006.01) B01J 37/08 (2006.01)

Patent

CA 2557345

The invention relates to a method for producing a supported catalyst, consisting of at least 75 wt. % Al2O3, whose delta- or theta-modified fraction of Al2O3 is at least 1 % of the total Al2O3 fraction and which contains a rhenium compound and optionally a promoter as the active component (A). According to the invention: a) a modified support (T) is produced from a conventional support (T) consisting of at least 75 wt. % of Al2O3, to which a promoter is optionally applied, the delta- or theta-modified fraction of the Al2O3 being at least 1 % of the total Al2O3 fraction, by the calcination of the conventional support (T) at a temperature of between 750 and 1100 ~C; b) a supported catalyst precursor is produced from the modified support (T) by the application of the active component comprising the rhenium compound (A) to the modified support (T); and c) the supported catalyst precursor is calcinated at a temperature of between 500 and 750 ~C.

L'invention concerne un procédé pour produire un catalyseur supporté qui comprend au moins 75 % en poids d'Al2O3 dont la proportion d'Al2O3 ayant subi une modification delta ou thêta correspond à au moins 1 % de la quantité totale d'Al2O3, et qui comporte en outre un composé rhénium et éventuellement un promoteur en tant que composant actif (A). Le procédé selon l'invention consiste : a) un produire, à partir d'un support (T) ordinaire qui comprend au moins 75 % en poids d'Al2O3 et sur lequel éventuellement un promoteur est appliqué, un support (T) modifié dont la proportion d'Al2O3 ayant subi une modification delta ou thêta correspond à au moins 1 % de la quantité totale d'Al2O3, par calcination du support (T) ordinaire à une température comprise entre 750 et 1100 °C ; b) à produire, à partir du support (T) modifié, un précurseur de catalyseur supporté, par application, sur le support (T) modifié, du composant actif (A) comprenant le composé rhénium, et ; c) à calciner le précurseur de catalyseur supporté à une température comprise entre 500 et 750 °C.

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