Gasoline sulfur reduction in fluid catalytic cracking

C - Chemistry – Metallurgy – 10 – G

Patent

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Details

C10G 11/05 (2006.01) C10G 11/02 (2006.01) C10G 11/18 (2006.01)

Patent

CA 2452434

The sulfur content of liquid cracking products, especially the cracked gasoline, is reduced in a catalytic cracking process employing a cracking catalyst containing a high content of vanadium. The cracking process involves introducing at least one vanadium compound into a hydrocarbon-sulfur containing feedstock to be charged to a fluid catalytic cracking reactor operating under steady state conditions and containing an equilibrium fluid craking catalyst inventory within the reactor. The amount of sulfur in the liquid products, in particular gasoline and LCO fractions, is reduced as a result of the increased vanadium content on the equilibrium catalyst. Advantageously, sulfur reduction is achieved even in the presence of other metal contaminants, such as nickel and iron, on the equilibrium catalyst.

Le procédé de l'invention permet de réduire la teneur en soufre des produits liquides obtenus par craquage catalytique, notamment de l'essence de craquage, au moyen d'un catalyseur de craquage contenant une proportion élevée de vanadium. Ce procédé consiste à introduire au moins un composé de vanadium dans un soufre hydrocarbure contenant une charge d'alimentation destinée à alimenter une réacteur de craquage catalytique fluide fonctionnant dans des conditions uniformes et contenant un stock de catalyseur de craquage fluide d'équilibre à l'intérieur du réacteur. La quantité de soufre contenues dans les produits liquides, notamment dans l'essence et les fractions LCO, est réduite à cause de l'augmentation de la proportion de vanadium sur le catalyseur d'équilibre. De manière avantageuse, la réduction de soufre est réalisée en présence d'autres contaminants métalliques, tels que le nickel et le fer, sur le catalyseur d'équilibre.

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