Catalyst – solid sorbent – or support therefor: product or process – Regenerating or rehabilitating catalyst or sorbent – Gas or vapor treating
Patent
1996-04-11
1998-10-27
Caldarola, Glenn
Catalyst, solid sorbent, or support therefor: product or process
Regenerating or rehabilitating catalyst or sorbent
Gas or vapor treating
502 38, 502 42, B01J 3830, B01J 3812
Patent
active
058277935
ABSTRACT:
Spent FCC catalyst is regenerated under net reducing conditions in a regenerator to minimize the migration of vanadium on the spent FCC catalyst particles. Reducing conditions in at least the bottom 50% of the catalyst bed are maintained by using at least two air distribution grids located in the lower 50% of the catalyst bed.
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O. Faltsi-Saravelou et al., "A Model for Fluidized Bed Simulation-II", Computers chem. Engng, vol. 15, No. 9, pp. 647-656, 1991 May.
R. Wormsbecher et al., "Vanadium Poisoning of Cracking Catalysts", Journal of Catalysis 100, 130-137 (1986) Feb.
Caldarola Glenn
Exxon Research and Engineering Company
Ghyka Alexander G.
Takemoto James H.
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