Catalytic cracking with reduced emissions of sulfur oxides

Details Catalytic cracking with reduced emissions of sulfur oxides Catalytic cracking with reduced emissions of sulfur oxides

B - Operations, Transporting

01

J

196/106, 252/1.E

B01J 23/00 (2006.01) B01D 53/50 (2006.01) B01J 23/10 (2006.01) B01J 23/90 (2006.01) B01J 29/06 (2006.01) B01J 29/90 (2006.01) C10G 11/05 (2006.01) C10G 11/14 (2006.01) C10G 11/18 (2006.01)

Patent

CA 1154735

ABSTRACT OF THE DISCLOSURE Sulfur oxides are removed at least partially from the gaseous regenerator effluent of a fluid catalytic crack- ing unit operated with feedstock containing sulfur compounds and converted to hydrogen sulfide in the cracking zone by associating sulfur oxides in the gas with at least one rare earth compound, preferably cerium or a rare earth mixture rich in cerium, supported on discrete particles of alumina. The alumina particles may be a component of parti- cles of a composite fluid cracking catalyst or separate fluidizable entities other than cracking catalyst and physi- cally admixed with the catalyst particles.

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