Process for reverse staging in hydroprocessing reactor systems

Details Process for reverse staging in hydroprocessing reactor systems Process for reverse staging in hydroprocessing reactor systems

C - Chemistry, Metallurgy

10

G

C10G 65/12 (2006.01) C10G 65/04 (2006.01)

Patent

CA 2223285

A hydrocarbon feed (1) is passed to a denitrification and desulfurization zone (10); passing said denitrification and desulfurization zone effluent to a purification/cooling zone (20) for removal of NH3 and H2S and cooling, and recovering from said purification/cooling zone a hydrogen/light hydrocarbon stream (30) and a liquid stream containing dissolved gases (35); passing said liquid stream containing dissolved gases to a separation zone (40) and recovering a light product (45), a liquid bottoms (50), and at least one side- cut product therefrom (52); passing said liquid bottoms (50) and said side-cut (52) product and said hydrogen/light hydrocarbon stream from step (30) (b) to a hydrocracking or a hydrotreating zone; passing said hydrocracking or hydrotreating zone effluent (65) to said denitrification and desulfurization zone (10).

L'invention concerne un procédé de séparation inverse dans des systèmes de chambres d'hydrotraitement, qui comprend les étapes suivantes: a) envoi d'hydrocarbure (1) dans une zone de dénitrification et de désulfuration; b) envoi des effluents issus de ladite zone de dénitrification et de désulfuration dans une zone (20) de purification/refroidissement pour éliminer NH¿3? et H¿2?S et refroidissement, et récupération, à partir de ladite zone de purification/refroidissement, d'un courant (30) d'hydrogène/hydrocarbure léger et d'un courant liquide contenant des gaz dissous (35); c) envoi du dit courant liquide contenant des gaz dissous dans une zone (40) de séparation, et récupération d'un produit léger (45), de dépôts liquides (50) et d'au moins un produit latéral (52); d) envoi desdits dépôts liquides (50), dudit produit latéral (52) et dudit courant hydrogène/hydrocarbure léger (30) de l'étape b) dans une zone d'hydrocraquage ou d'hydrotraitement; e) évacuation des effluents (65) issus de ladite zone d'hydrocraquage ou d'hydrotraitement dans ladite zone (10) de dénitrification ou désulfuration.

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