Fluid catalytic cracking process

Details Fluid catalytic cracking process Fluid catalytic cracking process

C - Chemistry, Metallurgy

10

G

C10G 11/18 (2006.01) B01J 8/00 (2006.01) B01J 8/08 (2006.01)

Patent

CA 2186156

Disclosed is a fluid catalytic cracking process in which the catalytic cracking reaction takes place in a dilute phase, and the reaction product contains a reduced volume of off gas having a low concentration of SOx and NOx. The use of off gas, which is produced during a regeneration step, to strip entrained vapor from spent catalytic cracking catalyst acts to reduce SOx and NOx byproducts, and eliminates the need to separately recover and treat the off gas stream from the regenerator portion of the system. The entire process, including the reaction step, the stripping step and the regeneration step, can be performed in a single vessel, and the stripping and reaction steps take place entirely in the dilute phase.

Procédé de craquage catalytique fluide, où la réaction de craquage catalytique s'effectue dans une phase diluée; le produit de réaction renferme un volume réduit de gaz libérés, à faible teneur en SOx et NOx. L'utilisation des gaz libérés, produits lors d'une étape de régéneration, pour laver les vapeurs entraînées à partir du catalyseur de craquage usé, permet de réduire les produits secondaires SOx et NOx et élimine la nécessité de récupérer et de traiter séparément les gaz libérés provenant de la section de régénération du système. L'ensemble du processus, y compris l'étape de réaction, peut être mis en oeuvre dans un seul contenant, les étapes de lavage et de réaction s'effectuant entièrement dans la phase diluée.

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