Process and apparatus for hot catalyst stripping above a bubblin

Details Process and apparatus for hot catalyst stripping above a bubblin Process and apparatus for hot catalyst stripping above a bubblin

1990-04-27

1991-08-27

McFarlane, Anthony

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208158, 208159, 208160, 208164, 502 40, 502 43, 502 44, C10G 1100, C10G 3510, B01J 2034

Patent

active

050430556

ABSTRACT:
A process and apparatus for achieving multistage, hot catalyst stripping of spent FCC catalyst in a bubbling bed regenerator having a stripper mounted over the regenerator and a stripped catalyst standpipe within the regenerator. Hot catalyst stripping is achieved by lifting regenerated catalyst into the conventional stripper or to a secondary catalyst stripper under the primary stripper. Spent catalyst is heated by direct contact heat exchange with hot regenerated catalyst. Three different types of lift gas may be used to transport catalyst from the regenerator to the hot stripper, a light reactive hydrocarbon, an inert, or steam.

REFERENCES:
patent: 4789458 (1988-12-01), Haddad et al.
patent: 4820404 (1989-04-01), Owen
Oil and Gas Journal, "Fluid Catalytic Cracking Report", by Amos A. Avidan, Michael Edwards, and Hartley Owen.

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