Patent US4176083A successfully refreshed from Google Patents.
US4176083A
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Separating flue gas from regenerated cracking catalyst
Assignee: Mobil Oil AS
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Filing: 1978-08-25
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Granted: 1979-11-27
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Expires: 1998-08-25
Abstract
Abstract A stripper arrangement is provided in a regenerated catalyst standpipe for removing or displacing combustion flue gas products with fuel gas products of hydrocarbon conversion freed of hydrogen sulfide.
Inventors
- 👤 Stephen J. McGovern
- 👤 Klaus W. Schatz
- 👤 Fred S. Zrinscak, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:12
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/005; B01J8/0055; B04; B04C; B04C5/00; B04C5/02; B04C5/06; B04C5/12; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G11/182; Y; Y02; Y02P; Y02P30/00; Y02P30/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
In a process for stripping hot regenerated catalyst with a fuel gas before passage to a hydrocarbon conversion operation, the improved method of stripping which comprises, passing hot regenerated catalyst with entrained CO 2 containing flue gas downwardly as a confined stream into a zone imparting a centrifugal annular catalyst flow to said downwardly flowing confined stream about a centrally positioned zone closed at its upper end but open in the bottom end thereof, contacting said annular flowing catalyst stream with fuel gas and displacing CO 2 from the catalyst, withdrawing fuel gas with displaced CO 2 into said centrally postioned zone for withdrawal from the stripping operation, and withdrawing regenerated catalyst displaced from CO 2 from beneath said centrally positioned zone for transfer to a hydrocarbon conversion zone.
Claim 2
Dependent Claim
129 words
In a process for stripping hot regenerated catalyst with a fuel gas before passage to a hydrocarbon conversion operation, the improved method of stripping which comprises, passing hot regenerated catalyst with entrained CO 2 containing flue gas downwardly as a confined stream into a zone imparting a centrifugal annular catalyst flow to said downwardly flowing confined stream about a centrally positioned zone closed at its upper end but open in the bottom end thereof, contacting said annular flowing catalyst stream with fuel gas and displacing CO 2 from the catalyst, withdrawing fuel gas with displaced CO 2 into said centrally postioned zone for withdrawal from the stripping operation, and withdrawing regenerated catalyst displaced from CO 2 from beneath said centrally positioned zone for transfer to a hydrocarbon conversion zone.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein the fuel gas has been separated from hydrogen sulfide before displacing said flue gas.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the fuel gas comprises C 3 and lower boiling component of a hydrocarbon cracking operation.
Claim 5
Dependent Claim
24 words
The method of claim 1 wherein the displacement of flue gas with fuel gas is accomplished without undesired temperature reduction of the regenerated catalyst.
Claim 6
Dependent Claim
35 words
The method of claim 1 wherein the displacement of flue gas with fuel gas is accomplished by passing the fuel gas through a horizontally circulating annular confined stream of catalyst into said centrally positioned zone.
Claim 7
Dependent Claim
71 words
The process of claim 1 wherein the annular catalyst flow is in a zone about the centrally positioned zone, hollow sloping baffles in said annular passageway provide open communication between said central zone and a separate confined annular zone about said annular flowing catalyst stream and fuel gas with displaced CO 2 is withdrawn from said central zone through said hollow baffles into said separate confined annular zone for withdrawal therefrom.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-26 | 1983-05-28 | 1983-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-26 | 1987-05-28 | 1987-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-26 | 1991-05-28 | 1991-11-27 | $7700.00 | Window Closed / Lapsed |