Process for increased olefin yields from heavy feedstocks

Details Process for increased olefin yields from heavy feedstocks Process for increased olefin yields from heavy feedstocks

C - Chemistry, Metallurgy

10

G

C10G 69/02 (2006.01) C10G 65/00 (2006.01) C10G 65/12 (2006.01) C10G 69/04 (2006.01) C10G 69/06 (2006.01)

Patent

CA 2263224

A process for upgrading petroleum feedstocks boiling in the distillate plus range, which feedstocks, when cracked, result in unexpected high yields of olefins. The feedstock is hydroprocessed in at least one reaction zone countercurrent to the flow of a hydrogen-containing treat gas. The hydroprocessed feedstock is then subjected to thermal cracking in a steam cracker or to catalytic cracking in a fluid catalytic cracking process. The resulting product slate will contain an increase in olefins compared with the same feedstock, but processed in by a conventional co-current hydroprocessing process.

Procédé pour valoriser les charges de pétrole dont le point d'ébullition se situe dans l'intervalle de distillation et au-delà, ce charges donnant après craquage une production d'oléfines remarquablement élevée. La charge est hydrocraquée dans au moins une zone de réaction dans laquelle elle circule à contre-courant du flux d'un gaz de traitement contenant de l'hydrogène. La charge hydrocraquée est ensuite soumise à un craquage thermique dans un vapocraqueur ou à un craquage catalytique au cours d'un procédure de craquage catalytique fluide. Le produit résultant contient une quantité accrue d'oléfines par rapport la quantité obtenue avec la même charge, mais traitée par un processus d'hydrocraquage conventionnel à courant parallèle.

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