Hydrocarbon upgrading process

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 45/02 (2006.01) C10G 45/00 (2006.01) C10G 65/04 (2006.01) C10G 69/00 (2006.01)

Patent

CA 2414319

Low sulfur gasoline of relatively high octane number is produced from a catalytically or thermally cracked, olefin-rich, sulfur-containing hydrocarbon stream by hydrodesulfurization followed by treatment over an acidic catalyst containing a molecular sieve belonging to the MCM-22 family in combination with a metal component, preferably selected from the transition elements of the 4th and 5th periods of the Periodic Table. The treatment over the acidic catalyst in the second step restores the octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number comparable to that of the hydrocarbon feed.

L'invention concerne une essence à basse teneur en soufre d'un indice relativement élevé d'octane, produite à partir d'un courant d'hydrocarbures de craquage obtenu thermiquement ou catalytiquement contenant du soufre et riche en oléfines par hydrodésulfuration suivie d'un traitement sur catalyseur acide contenant un tamis moléculaire appartenant à la famille MCM-22 en combinaison avec un composant métallique, sélectionné, de préférence, parmi des éléments de transition de la 4?e¿ et de la 5?e¿ période de la table de classification périodique. Le traitement sur catalyseur acide dans une seconde étape permet de rétablir la perte d'octane qui se produit suite au traitement d'hydrogénation et permet d'obtenir un produit d'essence à basse teneur en soufre avec un indice d'octane comparable à celui de la source d'hydrocarbures.

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