Separation of reacted hydrocarbons and catalyst in fluidized catalytic cracking

US4500423A · kind A · utility

Assignee

• Chevron Research Company · US

Inventors

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

Key dates

• Filing date: Jun 13, 1983
• Grant date: Feb 19, 1985
• Expiry date: Jun 13, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J8/005
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a baffle arrangement that 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 mixture of hydrocarbon and catalyst. According to the present invention, 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, in the preferred embodiment 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 ba…