FCC catalyst stripping with vapor recycle

Details FCC catalyst stripping with vapor recycle FCC catalyst stripping with vapor recycle

1993-12-17

1996-07-23

Pal, Asok

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208113, 208153, 208161, 502 20, C01G 1100, C01G 4500, C01G 4700

Patent

active

055386237

ABSTRACT:
An FCC process and apparatus operates with closed reactor cyclones and a catalyst stripper using H2 or recycled stripper vapor for stripping gas. Preferably stripper vapor is removed, cooled and condensed, and some vapor recycled to the stripper. Isolation of the stripper from the cracked product vapors permits use of large amounts of stripping steam, or stripping gases such as hydrogen.

REFERENCES:
patent: 3406112 (1968-10-01), Bowles
patent: 3412013 (1968-11-01), Bowles
patent: 4345992 (1982-08-01), Wisher et al.
patent: 4787967 (1988-11-01), Herbst et al.
patent: 4917790 (1990-04-01), Owen
patent: 4988430 (1991-01-01), Sechrist et al.
patent: 5000841 (1991-03-01), Owen
patent: 5158669 (1992-10-01), Cetinkaya
patent: 5237104 (1993-08-01), Summerlin
patent: 5248408 (1993-09-01), Owen
patent: 5248411 (1993-09-01), Chan

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