Fluid coking process
First Claim
1. In a process wherein a heavy hydrocarbon oil is cracked to a vaporous product including normally liquid hydrocarbons and to coke in a dense fluidized bed of solid particles in a coking zone maintained under fluid coking conditions which comprises the steps of passing a hot vaporous product from said coking zone to a scrubbing zone, introducing a hydrocarbonaceous oil feed to said scrubbing zone for contacting said oil feed with said vaporous product to condense heavy hydrocarbons from said vaporous product and to vaporize lower boiling hydrocarbons from said oil feed, and withdrawing at least a portion of a bottoms fraction from said scrubbing zone, the improvement which comprises:
- passing at least a portion of said withdrawn bottoms fraction from said scrubbing zone to a vacuum distillation zone and passing a portion of the vacuum distillation zone bottoms fraction to said coking zone, said hydrocarbonaceous oil feed introduced into said scrubbing zone being an atmospheric distillation residuum.
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Abstract
A hydrocarbonaceous oil is introduced to a quench and scrubbing zone mounted on a fluid coking reactor. Heat from the coker vapor product vaporizes a portion of the hydrocarbonaceous oil. The unvaporized portion of the oil is used to quench and scrub the coker vapor product. The bottoms fraction of the quench and scrubbing zone is passed to a vacuum distillation zone to recover a heavy oil fraction and to produce a vacuum residuum for use as coker feed.
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Citations
2 Claims
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1. In a process wherein a heavy hydrocarbon oil is cracked to a vaporous product including normally liquid hydrocarbons and to coke in a dense fluidized bed of solid particles in a coking zone maintained under fluid coking conditions which comprises the steps of passing a hot vaporous product from said coking zone to a scrubbing zone, introducing a hydrocarbonaceous oil feed to said scrubbing zone for contacting said oil feed with said vaporous product to condense heavy hydrocarbons from said vaporous product and to vaporize lower boiling hydrocarbons from said oil feed, and withdrawing at least a portion of a bottoms fraction from said scrubbing zone, the improvement which comprises:
- passing at least a portion of said withdrawn bottoms fraction from said scrubbing zone to a vacuum distillation zone and passing a portion of the vacuum distillation zone bottoms fraction to said coking zone, said hydrocarbonaceous oil feed introduced into said scrubbing zone being an atmospheric distillation residuum.
- View Dependent Claims (2)
Specification
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- Resources
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Current AssigneeExxon Research and Engineering Company (Exxon Mobil Corporation)
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Original AssigneeExxon Research and Engineering Company (Exxon Mobil Corporation)
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InventorsMetrailer, William J., Matula, Joseph P.
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Primary Examiner(s)Levine, Herbert
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Application NumberUS05/706,218Time in Patent Office477 DaysField of Search208/127, 208/101, 208/102, 208/81US Class Current208/81CPC Class CodesC10B 55/10 according to the "fluidised...
