Patent US1223377A successfully refreshed from Google Patents.
US4294688A
Expired / Lapsed
US
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Heat transfer in magnetically stabilized, fluidized beds
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1980-03-19
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Granted: 1981-10-13
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Expires: 2000-03-19
Abstract
Abstract Heat transfer in a hydrocarbon conversion process utilizing a magnetically stabilized fluid bed reactor and a magnetically stabilized catalyst regenerator is improved by the use of a fluidizable solids mixture comprising substantially inert heat carrier particles and magnetizable catalyst particles wherein the inert particles have settling rates higher than the settling rates of the catalyst particles. The heat carrier particles and the magnetizable catalyst particles are completely or partially separated in settling zones associated with the reactor and regenerator. The separated heat carrier particles and catalyst particles are independently circulated between the reactor and regenerator so that the heat carrier particles can be passed through one or more heat exchangers to provide the desired temperature levels in the system.
Inventors
- 👤 Francis X. Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:39
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/10; C10G49/16; B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/42; C10G11/00; C10G11/14; C10G11/18; C10G15/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
227 words
A hydrocarbon conversion process which comprises (a) contacting a hydrocarbon feedstock in a conversion zone having a magnetic field applied thereto with a fluidizable particulate solids mixture containing a plurality of separate discrete substantially inert heat carrier particles and magnetizable catalyst particles, said substantially inert heat carrier particles having settling rates higher than the settling rates of said catalyst particles; (b) permitting said heat carrier particles to settle in preference to the catalyst particles in a settling zone communicating with said conversion zone; (c) circulating said catalyst particles from the conversion zone to a regeneration zone having a magnetic field applied thereto; (d) circulating said heat carrier particles from the settling zone to said regeneration zone, said circulation of heat carrier particles being independent of the circulation of catalyst particles; (e) contacting said catalyst particles in the presence of said heat carrier particles with oxygen at elevated temperatures to burn coke deposited upon said catalyst particles; (f) permitting said heat carrier particles to settle in preference to the catalyst particles in a settling zone communicating with said regeneration zone; (g) circulating said catalyst particles from the regeneration zone to a conversion zone having a magnetic field applied thereto; and (h) circulating said heat carrier particles from the settling zone to said reaction zone, said circulation of heat carrier particles being independent of the circulation of catalyst particles.
Claim 2
Dependent Claim
227 words
A hydrocarbon conversion process which comprises (a) contacting a hydrocarbon feedstock in a conversion zone having a magnetic field applied thereto with a fluidizable particulate solids mixture containing a plurality of separate discrete substantially inert heat carrier particles and magnetizable catalyst particles, said substantially inert heat carrier particles having settling rates higher than the settling rates of said catalyst particles; (b) permitting said heat carrier particles to settle in preference to the catalyst particles in a settling zone communicating with said conversion zone; (c) circulating said catalyst particles from the conversion zone to a regeneration zone having a magnetic field applied thereto; (d) circulating said heat carrier particles from the settling zone to said regeneration zone, said circulation of heat carrier particles being independent of the circulation of catalyst particles; (e) contacting said catalyst particles in the presence of said heat carrier particles with oxygen at elevated temperatures to burn coke deposited upon said catalyst particles; (f) permitting said heat carrier particles to settle in preference to the catalyst particles in a settling zone communicating with said regeneration zone; (g) circulating said catalyst particles from the regeneration zone to a conversion zone having a magnetic field applied thereto; and (h) circulating said heat carrier particles from the settling zone to said reaction zone, said circulation of heat carrier particles being independent of the circulation of catalyst particles.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein said heat carrier particles are magnetizable.
Claim 4
Dependent Claim
58 words
The process of claim 2 wherein the heat carrier particles from the settling zone in step (d) are circulated to a heat exchanger means prior to transfer to the regeneration zone, and wherein the heat carrier particles from the settling zone in step (g) are circulated to a heat exchanger means prior to transfer to the reactor zone.
Claim 5
Dependent Claim
24 words
The process of claim 2 wherein said magnetic fields are uniform and oriented substantially axially to the flow of fluid in said reactor zone.
Claim 6
Dependent Claim
15 words
The process of claim 3 wherein a magnetic field is applied to said settling zone.
Claim 7
Dependent Claim
32 words
The process of claim 4 wherein said particulate solids mixture comprises 1 to 15 vol. % of the heat carrier particles and 85 to 99 vol. % of the magnetizable catalyst particles.
Claim 8
Dependent Claim
181 words
A hydrocarbon conversion process which comprises: (a) contacting a hydrocarbon feedstock in a conversion zone having a magnetic field applied thereto with a fluidizable particulate solids mixture containing a plurality of separate discrete substantially inert heat carrier particles and magnetizable catalyst particles, said substantially inert heat carrier particles having settling rates higher that the settling rates of said catalyst particles; (b) permitting said heat carrier particles to settle in preference to the catalyst particles in a settling zone communicating with said conversion zone; (c) circulating said heat carrier particles and said catalyst particles from the settling zone to a regeneration zone having a magnetic field applied thereto; (d) contacting said catalyst particles in the presence of said heat carrier particles with oxygen at elevated temperatures to burn coke deposited upon said catalyst particles; (e) permitting said heat carrier particles to settle in preference to the catalyst particles in a settling zone communicating with said regeneration zone; and (f) circulating said heat carrier particles and said catalyst particles from the regeneration zone to a conversion zone having a magnetic field applied thereto.
Claim 9
Dependent Claim
181 words
A hydrocarbon conversion process which comprises: (a) contacting a hydrocarbon feedstock in a conversion zone having a magnetic field applied thereto with a fluidizable particulate solids mixture containing a plurality of separate discrete substantially inert heat carrier particles and magnetizable catalyst particles, said substantially inert heat carrier particles having settling rates higher that the settling rates of said catalyst particles; (b) permitting said heat carrier particles to settle in preference to the catalyst particles in a settling zone communicating with said conversion zone; (c) circulating said heat carrier particles and said catalyst particles from the settling zone to a regeneration zone having a magnetic field applied thereto; (d) contacting said catalyst particles in the presence of said heat carrier particles with oxygen at elevated temperatures to burn coke deposited upon said catalyst particles; (e) permitting said heat carrier particles to settle in preference to the catalyst particles in a settling zone communicating with said regeneration zone; and (f) circulating said heat carrier particles and said catalyst particles from the regeneration zone to a conversion zone having a magnetic field applied thereto.
Claim 10
Dependent Claim
12 words
The process of claim 7 wherein said heat carrier particles are magnetizable.
Claim 11
Dependent Claim
64 words
The process of claim 8 wherein the heat carrier particles and catalyst particles from the settling zone in step (c) are circulated to a heat exchanger means prior to transfer to the regeneration zone and wherein the heat carrier particles and catalyst particles from the settling zone in step (f) are circulated to a heat exchanger means prior to transfer to the reaction zone.
Claim 12
Dependent Claim
24 words
The process of claim 9 wherein said magnetic fields are uniform and oriented substantially axially to the flow of fluid in said reaction zone.
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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |