US3652231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reconditioning system for moving column of reforming catalyst
Assignee: Universal Oil Products Co
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Filing: 1969-09-25
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Granted: 1972-03-28
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Expires: 1989-09-25
Abstract
Abstract A system for effecting the reconditioning of catalyst particles used in the reforming of a hydrocarbon stream which provides a vertically elongated confined chamber that will have the particles flow down between screens of perforated plates in a descending column through a carbon burn-off section and a halogenation section. A preferred design provides for an annularform column of particles with gas flows being out-to-in laterally through the column and, in addition, incorporates a drying section in the lower portion of the chamber. An overall system with a preferred design also combines means for scrubbing the flue gas stream from the burn-off section and returning it to the chamber and, in addition, combines means for continuously recycling a steam-halogen-air stream through the halogenation section.
Inventors
- 👤 Arthur R Greenwood
- 👤 Kenneth D Vesely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:48
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/10; C10G35/12; B; B01; B01J; B01J38/00; B01J38/04; B01J38/12; B01J38/18; B01J38/22; B01J38/26; B01J8/00; B01J8/08; B01J8/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
47 words
The apparatus as defined in claim 1 wherein said screens comprise wedge-shaped wires with the greater cross sections thereof being inwardly disposed, (and said wires being mounted vertically with respect to said chamber) whereby to minimize attrition of catalyst particles during descending movement thereof through said zones.
Claim 2
Dependent Claim
33 words
The apparatus system of claim 1 further characterized in that said residual gas outlet means from said chlorination section extends upwardly through said interior cylinDrical form perforate screen means and from said chamber.
Claim 3
Dependent Claim
92 words
The apparatus system of claim 1 further characterized in that each of said perforate screen means is formed of wedge-shaped wire providing resulting wedge-shaped slots therebetween, said outer of the cylindrical screen means has the wide portion of the wedge-shaped wire along the inner surface thereof and said inner cylindrical screen means has the wider portion of the wedge-shaped wire along the outer surface, whereby any particle which may pass through spaces between wires of the screen means will pass into slots of enlarging cross-sectional area and will not clog screen openings.
Claim 4
Dependent Claim
66 words
The apparatus system of claim 1 further characterized in that a catalyst particle drying section connects with the lower portion of said chamber below said chlorination section and communicates therewith through open passageway means and a drying gas inlet means connects to a lower portion of said drying section whereby a drying gas flow will be countercurrently upwardly through the descending particles in said drying section.
Claim 5
Dependent Claim
104 words
The apparatus system of claim 5 further characterized in that a particle collection section is provided below said catalyst particle drying section and connects therewith through a gas flow restricting means, a reducing gas inlet means communicates with said particle collection section whereby such gas is commingled with the particles to provide a fluidized stream of particles for withdrawal therefrom, a conduit means for the resulting fluidized catalyst particle stream connects with a particle reducing section, and a heating medium additionally connects with the latter for indirect heat exchange with said commingled stream whereby there may be a high temperature reduction of such stream.
Claim 6
Dependent Claim
36 words
The apparatus system of claim 6 still further characterized in that said particle collection section below said drying section connects with the latter through a lock-hopper means whereby to preclude gas flow between the two sections.
Claim 7
Dependent Claim
78 words
The apparatus system of claim 1 further characterized in that the flue gas outlet means from said carbon burn-off section connects with a gas scrubber means providing a gas-liquid contact with a caustic liquid to effect the removal of sulfur compounds and conduit means and blower means connects with scrubber means with first said gas inlet means provides for the resulting scrubbed gas stream return to said carbon burn-off section for lateral flow through the descending particles therein.
Claim 8
Dependent Claim
67 words
The apparatus system of claim 1 further characterized in that the gas outlet means from said halogenation section connects with a recirculation system including conduit means, a blower means, a heating means, and steam inlet means and halogen addition means, whereby a given halogenation level and predetermined temperature level may be provided for the gaseous charge stream to the halogen gas inlet means to said halogenation section.
Claim 9
Dependent Claim
48 words
The apparatus as defined in claim 1 wherein said residual halogenation gas outlet conduit is tapered through said carbon burn-off section with an increasing cross-sectional area toward the lower end portion, whereby there is an increasing area gas collection section for flue gas flow upwardly around said conduit.
References Cited (Backward Citations)
US2835629A
Cited
US2390708A
Cited
US2303717A
Cited
US2493218A
Cited
US2534859A
Cited
US2516943A
Cited
US2775547A
Cited
US2856350A
Cited
US3134732A
Cited
US2835560A
Cited
US2934493A
Cited
US3375190A
Cited
US3243384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-28 | 1975-09-27 | 1976-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-28 | 1979-09-27 | 1980-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-28 | 1983-09-27 | 1984-03-28 | $7700.00 | Window Closed / Lapsed |