Separation of reacted hydrocarbons and catalyst in fluidized catalytic cracking

US4721603A · kind A · utility

Assignee

• Chevron Research Company · US

Inventors

• Russell R. Krug · Novato, US
• Peter C. Schmidt · Leverkusen, DE

Key dates

• Filing date: Jan 9, 1985
• Grant date: Jan 26, 1988
• Expiry date: Jan 9, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10G11/18
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A specific baffle arrangement within a catalytic reactor improves separation of gaseous hydrocarbon reaction products from catalyst within the reactor vessel of a fluidized catalytic cracker unit. The catalytic reactor vessel includes an outer generally cylindrical shell having a stripping zone arranged at the lower end of the vessel. An inlet riser conduit forming a primary reaction zone extends generally within the shell from the lower end of the vessel to a location near the top of the vessel. A shroud surrounds the upper end of the riser conduit and forms an annular outlet for downwardly discharging a mixtrue of hydrocarbon and catalyst. An annular catalyst disengaging riser baffle for deflecting the mixture from the outlet toward the wall of the vessel is arranged on the outside of the riser conduit below the annular outlet and above the stripping zone. Still further, an annular catalyst disengaging wall baffle is arranged on the inside of the shell for again deflecting the mixture, now mostly catalyst, generally downwardly and toward the stripping zone of the vessel. Preferably, the riser baffle and the wall baffle are arrnaged within the shell such that the baffles in concer…