US4668379A
Expired / Lapsed
US
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Process for magnetically stabilizing a fluidized bed containing nonmagnetizable particles and a magnetizable fluid
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1985-05-23
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Granted: 1987-05-26
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Expires: 2005-05-23
Abstract
Abstract This invention relates to a fluidized bed process. More particularly, the present invention is a process for operating a magnetically stabilized fluidized bed by using a magnetizable fluid to fluidize solid particulate nonmagnetizable fluidizable particles. The operating conditions are such that there is substantially no random motion or time-varying pressure fluctuation as measured at a point within the bed.
Inventors
- 👤 Ronald E. Rosensweig
- 👤 George Ciprios
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:36
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/32; B01; B01D; B01D15/00; B01D15/02; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/42; C; C07; C07C; C07C7/00; C07C7/12; C07C7/13
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
The process for stabilizing a fluidized bed consisting essentially of solid non-magnetizable solid particles having a substantially vertical axis and comprising the steps of: fluidizing the non-magnetizable particles using a magnetizable liquid flowing upwardly through said bed at a superficial velocity between U mf and U t , and subjecting the bed to a substantially uniform applied magnetic field having a substantial component along the axis of the bed, said field being of a strength sufficient to prevent substantial particle backmixing along said axis.
Claim 2
Dependent Claim
84 words
The process for stabilizing a fluidized bed consisting essentially of solid non-magnetizable solid particles having a substantially vertical axis and comprising the steps of: fluidizing the non-magnetizable particles using a magnetizable liquid flowing upwardly through said bed at a superficial velocity between U mf and U t , and subjecting the bed to a substantially uniform applied magnetic field having a substantial component along the axis of the bed, said field being of a strength sufficient to prevent substantial particle backmixing along said axis.
Claim 3
Dependent Claim
11 words
The process of claim 1 wherein the nonmagnetizable particles comprise zeolites.
Claim 4
Dependent Claim
14 words
The process of claim 2 wherein the nonmagnetizable particles comprise zeolites and a binder.
Claim 5
Dependent Claim
24 words
The process of claim 2 wherein the zeolites are selected from the group consisting of Type X, Type Y, Type A and Type beta.
Claim 6
Dependent Claim
12 words
The process of claim 1 wherein the magnetizable fluid comprises a ferrofluid.
Claim 7
Dependent Claim
13 words
The process of claim 5 wherein the magnetizable fluid additionally comprises a hydrocarbon.
Claim 8
Dependent Claim
12 words
The process of claim 6 wherein the hydrocarbon comprises an aromatic hydrocarbon.
Claim 9
Dependent Claim
14 words
The process of claim 7 wherein the aromatic hydrocarbon comprises ethylbenzene and isomeric xylenes.
Claim 10
Dependent Claim
19 words
The process of claim 1 wherein the magnetizable fluid is in countercurrent flow with respect to the nonmagnetizable particles.
Claim 11
Dependent Claim
18 words
The process of claim 1 wherein the magnetizable fluid flows cocurrently with the non-magnetizable particles comprising the bed.
Claim 12
Dependent Claim
13 words
The process of claim 1 wherein the bed is a non-moving fluidized bed.
Claim 13
Dependent Claim
17 words
The process of claim 1 wherein the non-magnetizable particles move across the flow of the magnetizable fluid.
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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) | 1990-05-25 | 1990-11-24 | 1991-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-25 | 1994-11-24 | 1995-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-25 | 1998-11-24 | 1999-05-26 | $7700.00 | Window Closed / Lapsed |