C6 recycle for propylene generation in a fluid catalytic...

Details C6 recycle for propylene generation in a fluid catalytic... C6 recycle for propylene generation in a fluid catalytic...

C - Chemistry, Metallurgy

10

G

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

Patent

CA 2515524

The present invention relates to a process for selectively producing C3olefins from a catalytically cracked or thermally cracked naphtha stream. The process is practiced by recycling a C6 rich fraction of the catalytic naphtha product to the riser upstream the feed injection point, to a parallel riser, to the spent catalyst stripper, and/or to the reactor dilute phase immediately above the stripper.

La présente invention concerne un processus de production sélective d'oléfines C¿3 ?à partir d'un flux de naphta craqué catalytiquement ou thermiquement. Le processus est mis en oeuvre par le recyclage d'une fraction riche en C¿6 ?à partir du produit de naphta catalytique dans le montant en amont du point d'injection d'alimentation, vers un montant parallèle, vers le stripper, et/ou vers la phase de dilution du réaction, immédiatement au-dessus du stripper.

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