The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 1983
Filed:
Nov. 23, 1981
Edward C Luckenbach, Mountainside, NJ (US);
Exxon Research and Engineering Co., Florham Park, NJ (US);
Abstract
Apparatus wherein spent, coked catalyst is admixed with combustion air externally of the regenerator and then introduced into the lower portion of a dense phase fluidized bed of said regenerator via an inlet. The inlet is characterized as an annulus, annular area or zone around a regenerated catalyst standpipe from which regenerated catalyst is removed from the regenerator and recycled to the reactor. Generally from about 3 percent to about 20 percent, preferably from about 5 percent to about 10 percent, of the total air introduced into the regenerator is introduced in this manner and balance of the air, which is in itself sufficient for complete combustion, is introduced via a separate air inlet into the regenerator. Disc and doughnut shaped gas distributors disposed within the annular inlet and a radial distributor plate disposed above the inlet provide a more even flow of the spent, coked catalyst into the regenerator with the result that the coke is burned from the catalyst in the lower portion of a dense phase fluidized bed and a flue gas of more constant composition is produced throughout the regenerator. Hydrocarbon contaminants from the reactor, not removed by stripping, are also effectively burned in the lower portion of the dense phase fluidized bed and as a result, the flue gas generated in this portion of the catalyst bed differs little from flue gas formed in other parts of the bed.