C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/111
C10G 11/00 (2006.01) B01D 53/86 (2006.01) C10G 11/02 (2006.01)
Patent
CA 1122912
ABSTRACT OF THE DISCLOSURE Carbon monoxide and sulfur oxides are removed from flue gas pro- duced in a catalyst regenerator in an FCC system and sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases re- moved from the cracking reactor in the system by introducing sufficient mol- ecular oxygen into the catalyst regenerator to provide an atmosphere therein having a molecular oxygen concentration of at least 0.1 volume percent, re- acting carbon monoxide in the regenerator flue gas with oxygen in contact with a particulate carbon monoxide combustion promoter physically admixed with the cracking catalyst, reacting sulfur oxides in the regenerator flue gas with silica-free alumina included as a discrete phase in the FCC cat- alyst to form a sulfur-containing solid in the catalyst, and forming hydro- gen sulfide in the cracking reactor by contacting the sulfur-containing solid with the hydrocarbon feed.
297023
Blanton William A.
Flanders Robert L.
Chevron Research And Technology Company
Smart & Biggar
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