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US 4,615,992 AGranted
Catalyst regeneration process with improved catalyst distribution in a fluidized bed
AssigneeAir Products and Chemicals, Inc.
InventorJames R. Murphy
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Abstract
The present invention provides for a process and associated apparatus for limiting the vertical mixing of catalyst in a fluidized catalyst regenerator so that spent catalyst entering the regenerator will remain at the top of the fluidized bed for a longer period of time. This is accomplished by employing a generally horizontally placed baffle device located between 2 ft.-4 ft. below the catalyst bed level in the regenerator.
Claims8
A process for regenerating spent catalyst which comprises:
- (a) passing said spent catalyst through a vertical stand pipe positioned within a regenerator vessel;
- (b) withdrawing said spent catalyst from the vertical stand pipe and introducing it into an upright well pipe which extends part way up the interior of the regenerator vessel and being concentrically arranged around the exterior of the vertical stand pipe;
- (c) withdrawing the spent catalyst from the upright well pipe and depositing it in a fluidized catalyst bed located within the regeneration vessel;
- (d) establishing a baffle or subway grating between 2 ft-4 ft below the top of the fluidized catalyst bed;
- (e) fluidizing said catalyst bed with an oxidizing agent to burn off carbon deposits on the catalysts, thereby regenerating said catalysts;
- and
- (f) withdrawing said regenerated catalysts from the regenerator vessel.
4 more elements
Dependencies are inferred from the claim text.