FCC stripping method

Patent · Tue May 14 04:00:00 EDT 1991

OSTI ID:5117553

Cetinkaya, I B

This patent describes a method of stripping catalyst in a stripping zone associated with a fluid catalytic cracking reactor wherein the stripping zone removes hydrocarbons from a continuously circulating stream of fluidized particulate catalyst by contact with a stripping gas. It comprises: passing catalyst particles from a reaction zone into the upper end of a principally vertical stripping zone, passing the catalyst downwardly through a transverse flow area of the stripping zone, and withdrawing catalyst particles from a lower portion of the stripping zone; adding stripping gas to a lower portion of the stripping zone, passing the stripping gas upwardly through the stripping zone in countercurrent contact with the catalyst, and removing the stripping gas from an upper section of the stripping zone; deflecting catalyst flow through the stripping zone with at least one downwardly sloped grid and projects into the transverse flow area, and collecting upwardly flowing stripping gas under the at least one grid and redistributing stripping gas laterally across the transverse flow area in a plurality of horizontal jets formed by holes in at least one grid producing jets of at least two different lengths.

• Assignee: UOP, Des Plaines, IL (USA)
• Patent Number(s): US 5015363; A
• Application Number: PPN: US 7-450485
• OSTI ID: 5117553
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
020500 -- Petroleum-- Products & By-Products
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CATALYSTS
CATALYTIC CRACKING
CHEMICAL REACTIONS
CHEMICAL REACTORS
CRACKING
DECOMPOSITION
HYDROCARBONS
MANAGEMENT
MATERIALS RECOVERY
ORGANIC COMPOUNDS
PROCESSING
PYROLYSIS
RECOVERY
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING