Upgrading naphtha in a single riser fluid catalytic cracking...

Details Upgrading naphtha in a single riser fluid catalytic cracking... Upgrading naphtha in a single riser fluid catalytic cracking...

C - Chemistry, Metallurgy

10

G

196/100

C10G 11/05 (2006.01) B01J 8/00 (2006.01) B01J 8/12 (2006.01) B01J 8/38 (2006.01) C10G 11/18 (2006.01)

Patent

CA 1295276

F-4021 UPGRADING NAPHTHA IN A SINGLE RISER FLUID CATALYTIC CRACKING OPERATION EMPLOYING A CATALYST MIXTURE ABSTRACT OF THE DISCLOSURE The present invention discloses a catalytic cracking operation featuring a single riser in which a variety of hydrocarbon conversion reactions takes place, a stripping unit in which entrained hydrocarbon material is removed from catalyst and a regeneration zone in which spent cracking catalyst is regenerated, which comprises: a) converting a relatively high boiling charge material introduced to the riser at a lower level thereof in the presence of a first catalyst component which is an amorphous cracking catalyst and/or a large pore crystalline silicate cracking catalyst to provide lighter products including significant quantities of naphtha; and, b) converting a naphtha charge material introduced to the riser at a higher level thereof in the presence of a second catalyst component which is a shape selective medium pore crystalline silicate zeolite catalyst to provide a relatively high octane gasoline product.

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