Two stage hydrocracking process

Details Two stage hydrocracking process Two stage hydrocracking process

C - Chemistry, Metallurgy

10

G

C10G 65/12 (2006.01) C10G 65/10 (2006.01)

Patent

CA 2441220

A two stage hydrocracking process is characterized by operation of the second hydrocracking zone at a reduced pressure, which is conducive to cracking the highly paraffinic effluent of the first hydrocracking zone. The process is also characterized by the passage of the partially compressed hydrogen makeup gas stream into the second hydrocracking zone followed by compressing the gas recovered from the second hydrocracking zone effluent to form the makeup gas to the first stage hydrocracking zone. There is no recycle gas stream for the second hydrocracking zone.

L'invention porte sur un procédé d'hydrocraquage en deux étapes se caractérisant par le traitement d'une seconde zone d'hydrocraquage à une pression réduite qui est favorable au craquage de l'effluent extrêmement paraffinique de la première zone d'hydrocraquage. Le procédé se caractérise également par le passage d'un courant gazeux d'appoint d'hydrogène partiellement comprimé dans la seconde zone d'hydrocraquage suivi de la compression du gaz récupéré dans l'effluent de la seconde zone d'hydrocraquage de façon à former le courant gazeux d'appoint dans la première zone d'hydrocraquage. Il n'y a pas de courant gazeux de recyclage pour la seconde zone d'hydrocraquage.

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