Two stage hydrodesulfurization process

Details Two stage hydrodesulfurization process Two stage hydrodesulfurization process

C - Chemistry, Metallurgy

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C01G 45/08 (2006.01) B01J 23/882 (2006.01) B01J 35/00 (2006.01) B01J 35/10 (2006.01) C10G 25/00 (2006.01) C10G 45/08 (2006.01) C10G 65/04 (2006.01) B01J 35/02 (2006.01)

Patent

CA 2334883

A process for hydrodesulfurizing naphtha feedstreams wherein the reactor inlet temperature is below the dew point of the feedstock at the reactor inlet so that the naphtha will completely vaporize within the catalyst bed. It is preferred to use a catalyst comprised of about 1 to about 10 wt.% MoO3, about 0.1 to about 5wt.%CoO supported on a suitable support material. They are also characterized as having an average medium pore diameter from about 60 .ANG. to 200 .ANG., a Co/Mo atomic ratio of about 0.1 to about 1.0, a MoO3 surface concentration of about 0.5 x 10-4 to about 3.0 x 10-4g MoO3/m2, and an average particle size of less than about 2.0mm in diameter.

L'invention concerne un procédé d'hydrodésulfuration d'un flux de charge de naphta, dans lequel la température d'entrée du réacteur est inférieure au point de rosée de la charge de départ à l'entrée du réacteur, de sorte que le naphta est entièrement vaporisé dans le lit de catalyse. On préfère utiliser un catalyseur composé d'environ 1 à 10 % en poids de MoO¿3?, et d'environ 0,1 à 5 % en poids de CoO, disposé sur un matériau de support adapté. Ces catalyseurs sont en outre caractérisés par un diamètre moyen de pores compris entre 60 .ANG. et 200 .ANG., un rapport atomique Co/Mo d'environ 0,1, une concentration superficielle de MoO¿3? comprise entre 0,5 x 10?-4¿ et 3,0 x 10?-4¿ MoO¿3?/m?2¿ environ, et une taille moyenne de particules inférieure à environ 2,0 mm de diamètre.

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