C - Chemistry – Metallurgy – 10 – G
Patent
C - Chemistry, Metallurgy
10
G
196/73
C10G 11/18 (2006.01)
Patent
CA 1264693
"REDUCING THE TEMPERATURE IN A REGENERATION ZONE OF A FLUID CATALYTIC CRACKING PROCESS" ABSTRACT A method for operating a fluid catalytic cracking unit comprising a regeneration zone and a reaction zone with a relatively reduced temperature in the regeneration zone while processing a high-coke-making hydrocarbon feedstock having a 50 volume percent distillation temperature greater than about 500°F (260°C) which method comprises contacting at conversion conditions the feedstock in a reaction zone with a fluidizable mixture of regenerated cracking catalyst and low-coke-make non-catalytic solid particles, comprising a refractory inorganic oxide, in a ratio of low-coke-make solid particles to cracking catalyst from about 1:100 to about 10:1, the low-coke-make solid particles having a surface area of less than about 5 m2/g and a coke making capability of less than about 0.2 weight percent coke in the ASTM standard method For testing cracking catalyst by microactivity (MAT); separat- ing the resulting hydrocarbon products from the mixture of deactivated cracking catalyst and low-coke-make solid particles; recovering the hydro- carbon products; passing the mixture of cracking catalyst and low-coke-make solid particles to the regeneration zone for regeneration by removal of coke; and passing the resulting regenerated mixture of cracking catalyst and low-coke make solid particles from the regeneration zone to the reaction zone to contact the feedstock as described above whereby the regeneration zone temperature is maintained at a reduced temperature as compared to an equivalent operation without the use of the low-coke-make solid particles while simultaneously not reducing the coke burning capacity of the regeneration zone or affecting the operation of the reaction zone.
497345
Lengemann Robert A.
Mott Raymond W.
Thompson Gregory J.
Vickers Anthony G.
Lengemann Robert A.
Macrae & Co.
Mott Raymond W.
Thompson Gregory J.
Uop Inc.
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