US4010094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combusting flue gas in a cracking catalyst regeneration process
Assignee: Standard Oil Co
•
Filing: 1975-05-09
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Granted: 1977-03-01
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Expires: 1995-05-09
Abstract
Abstract Flue gas containing CO 2 and CO from a fluidized cracking unit catalyst regenerator is fed to a combustor in which CO combustion is completed. The CO combustion can be enhanced by injection of air or oxygen-containing gas into the combustor. The combustor may include CO combustion promoters such as oxidation-promoting catalyst grids, and may also include auxiliary fuel injection or other means to initiate or facilitate the combustion. The process of this invention further comprises indirect or direct recovery of the heat resulting from the combustion of CO in the flue gas by the cracking catalyst particles, which may be returned separately to the regenerator bed or transferred to the cracking reactor with or without fresh catalyst, or may be recycled to the CO combustor inlet or combined with other catalyst particles passing to the regenerator. In a preferred embodiment of this invention, combustion of CO in the flue gas occurs in two or more different stages to permit close catalyst temperature control and optional multiple use of the heat recovered by the catalyst particles.
Inventors
- 👤 Claude O. McKinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:33
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G11/182; Y; Y02; Y02P; Y02P30/00; Y02P30/40
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
154 words
A hydrocarbon catalytic cracking process, including hydrocarbon cracking and catalyst regeneration, comprising: regenerating fluidized hydrocarbon cracking catalyst particles, which have been deactivated with coke deposits while employed in said hydrocarbon cracking, in a catalyst regenerator at regeneration temperature by contact with an oxygen-containing gas stream to combust coke on the catalyst and produce a carbon monoxide-containing flue gas, passing said carbon monoxide-containing flue gas from the catalyst regenerator, oxidizing said carbon monoxide-containing flue gas from the catalyst regenerator to substantially completely combust carbon monoxide contained therein to form a combusted effluent of reduced carbon monoxide content, withdrawing catalyst from the catalyst regenerator separately from said carbon monoxide-containing flue gas, passing said withdrawn catalyst, which is relatively free of carbonaceous material, in heat exchange relation with said combusted effluent to transfer heat generated from the carbon monoxide combustion to said cracking catalyst particles, and conveying the resulting heated catalyst particles to said catalytic cracking process.
Claim 2
Dependent Claim
154 words
A hydrocarbon catalytic cracking process, including hydrocarbon cracking and catalyst regeneration, comprising: regenerating fluidized hydrocarbon cracking catalyst particles, which have been deactivated with coke deposits while employed in said hydrocarbon cracking, in a catalyst regenerator at regeneration temperature by contact with an oxygen-containing gas stream to combust coke on the catalyst and produce a carbon monoxide-containing flue gas, passing said carbon monoxide-containing flue gas from the catalyst regenerator, oxidizing said carbon monoxide-containing flue gas from the catalyst regenerator to substantially completely combust carbon monoxide contained therein to form a combusted effluent of reduced carbon monoxide content, withdrawing catalyst from the catalyst regenerator separately from said carbon monoxide-containing flue gas, passing said withdrawn catalyst, which is relatively free of carbonaceous material, in heat exchange relation with said combusted effluent to transfer heat generated from the carbon monoxide combustion to said cracking catalyst particles, and conveying the resulting heated catalyst particles to said catalytic cracking process.
Claim 3
Dependent Claim
23 words
The process of claim 1 wherein said transfer of heat is accomplished by direct contact between the combusted effluent and the catalyst particles.
Claim 4
Dependent Claim
18 words
The process of claim 2 wherein said transfer of heat is conducted within a flue gas transfer line.
Claim 5
Dependent Claim
17 words
The process of claim 1 wherein said resulting hot catalyst particles are conveyed to a cracking reactor.
Claim 6
Dependent Claim
31 words
The process of claim 1 wherein said resulting hot catalyst particles are conveyed to an area in which heat is exchanged with and received by hydrocarbons in the hydrocarbon cracking process.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein said resulting hot catalyst particles are conveyed to said catalyst regenerator.
Claim 8
Dependent Claim
166 words
A hydrocarbon catalytic cracking process, including the completion of catalyst regeneration carbon monoxide-containing flue gas combustion, comprising: regenerating fluidized hydrocarbon cracking catalyst particles which have been deactivated with coke deposits while employed in the hydrocarbon cracking process, in a catalyst regenerator at regeneration temperature by contact with an oxygen-containing gas stream to combust coke on the catalyst to produce a carbon monoxide-containing flue gas, passing said carbon monoxide-containing flue gas from the catalyst regenerator, combining said flue gas with an oxygen-containing gas to form a combustible gaseous mixture, igniting said combustible gaseous mixture to substantially complete the combustion of the carbon monoxide contained therein, transferring heat generated from said carbon monoxide combustion at a plurality of heat transfer areas to a plurality of hydrocarbon cracking catalyst particle streams containing particles withdrawn from said catalyst regenerator separately from said carbon monoxide-containing flue gas, said particles being relatively free of carbonaceous material, and conveying resulting hot hydrocarbon catalyst particle streams to the hydrocarbon cracking process for heat exchange.
Claim 9
Dependent Claim
166 words
A hydrocarbon catalytic cracking process, including the completion of catalyst regeneration carbon monoxide-containing flue gas combustion, comprising: regenerating fluidized hydrocarbon cracking catalyst particles which have been deactivated with coke deposits while employed in the hydrocarbon cracking process, in a catalyst regenerator at regeneration temperature by contact with an oxygen-containing gas stream to combust coke on the catalyst to produce a carbon monoxide-containing flue gas, passing said carbon monoxide-containing flue gas from the catalyst regenerator, combining said flue gas with an oxygen-containing gas to form a combustible gaseous mixture, igniting said combustible gaseous mixture to substantially complete the combustion of the carbon monoxide contained therein, transferring heat generated from said carbon monoxide combustion at a plurality of heat transfer areas to a plurality of hydrocarbon cracking catalyst particle streams containing particles withdrawn from said catalyst regenerator separately from said carbon monoxide-containing flue gas, said particles being relatively free of carbonaceous material, and conveying resulting hot hydrocarbon catalyst particle streams to the hydrocarbon cracking process for heat exchange.
Claim 10
Dependent Claim
32 words
The process of claim 7 wherein said transfer of heat in at least one heat transfer area is accomplished by direct contact between the combusted gaseous mixture and a catalyst particle stream.
Claim 11
Dependent Claim
26 words
The process of claim 8 wherein said transfer of heat in at least one heat transfer area is conducted within a flue gas transfer line exchanger.
Claim 12
Dependent Claim
27 words
The process of claim 7 wherein at least one of said resulting hot catalyst particle streams is conveyed to a cracking reactor within the hydrocarbon cracking process.
Claim 13
Dependent Claim
36 words
The process of claim 7 wherein at least one of said resulting hot catalyst particle streams is conveyed to an area in which heat is exchanged with and received by hydrocarbons within the hydrocarbon cracking process.
Claim 14
Dependent Claim
22 words
The process of claim 7 wherein at least one of said resulting hot catalyst particle streams is conveyed to said catalyst regenerator.
Claim 15
Dependent Claim
26 words
The process of claim 7 wherein at least two of said resulting hot catalyst particle streams are conveyed to different areas within the hydrocarbon cracking process.
Claim 16
Dependent Claim
41 words
The process of claim 7 wherein said particles from said catalyst regenerator to which the heat from the carbon monoxide combustion is transferred are precooled to about 150° to about 700° F. below the regeneration temperature before said heat is transferred.
Claim 17
Dependent Claim
152 words
A hydrocarbon catalytic cracking process, including hydrocarbon cracking and catalyst regeneration, comprising: regenerating fluidized hydrocarbon cracking catalyst particles, which have been deactivated with coke deposits while employed in said hydrocarbon cracking, in a catalyst regenerator at regeneration temperature by contact with an oxygen-containing gas stream to combust coke on the catalyst and produce a carbon monoxide-containing flue gas, passing said carbon monoxide-containing flue gas from the catalyst regenerator, oxidizing said carbon monoxide-containing flue gas from the catalyst regenerator to combust carbon monoxide contained therein to form a combusted effluent of reduced carbon monoxide content, withdrawing catalyst from the catalyst regenerator separately from said carbon monoxide-containing flue gas, passing said withdrawn catalyst, which is relatively free of carbonaceous material, in heat exchange relation with said combusted effluent to transfer heat generated from the carbon monoxide combustion to said cracking catalyst particles, and conveying the resulting heated catalyst particles to said catalytic cracking process.
Claim 18
Dependent Claim
152 words
A hydrocarbon catalytic cracking process, including hydrocarbon cracking and catalyst regeneration, comprising: regenerating fluidized hydrocarbon cracking catalyst particles, which have been deactivated with coke deposits while employed in said hydrocarbon cracking, in a catalyst regenerator at regeneration temperature by contact with an oxygen-containing gas stream to combust coke on the catalyst and produce a carbon monoxide-containing flue gas, passing said carbon monoxide-containing flue gas from the catalyst regenerator, oxidizing said carbon monoxide-containing flue gas from the catalyst regenerator to combust carbon monoxide contained therein to form a combusted effluent of reduced carbon monoxide content, withdrawing catalyst from the catalyst regenerator separately from said carbon monoxide-containing flue gas, passing said withdrawn catalyst, which is relatively free of carbonaceous material, in heat exchange relation with said combusted effluent to transfer heat generated from the carbon monoxide combustion to said cracking catalyst particles, and conveying the resulting heated catalyst particles to said catalytic cracking process.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |