US4057487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid coking process
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1976-07-19
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Granted: 1977-11-08
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Expires: 1996-07-19
Abstract
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.
Inventors
- 👤 William J. Metrailer
- 👤 Joseph P. Matula
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:47
CPC Classifications
C; C10; C10B; C10B55/00; C10B55/02; C10B55/04; C10B55/08; C10B55/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
158 words
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of a bottoms fraction from said scrubbing zone, the improvement which comprises: passing at least a portion of said withdrawn bottoms fraction from said scrubbing zone to a vacuum distillation zone and passing a portion of the vacuum distillation zone bottoms fraction to said coking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.
Claim 2
Dependent Claim
158 words
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.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein said coking conditions include a temperature ranging from about 850° F. to about 1,400° F. and a pressure ranging from about 5 to about 150 psig.
References Cited (Backward Citations)
US3144400A
Cited
US3702516A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-07 | 1981-05-09 | 1981-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-07 | 1985-05-09 | 1985-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-07 | 1989-05-09 | 1989-11-08 | $7700.00 | Window Closed / Lapsed |