US4094814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration method for gravity-flowing deactivated catalyst particles
Assignee: Honeywell UOP LLC
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Filing: 1977-06-15
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Granted: 1978-06-13
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Expires: 1997-06-15
Abstract
Abstract A continuous method for regenerating deactivated catalyst particles in a regeneration zone through which the particles are downwardly movable by way of gravity-flow. Particles are initially introduced into an upper carbon-burning/halogenation zone wherein they are contacted, in a first section, with a first air stream and a first mixture of steam and a halogen, or halogen-containing compound. Partially regenerated/reconditioned particles are then contacted, in a lower second section, with a second air stream and second mixture of steam and halogen. From this two-sectioned, carbon-burning/halogenation zone, the catalyst particles flow via gravity into a drying zone wherein they are contacted by a substantially dry air stream.
Inventors
- 👤 Earl S. Lemberger
- 👤 Robert K. Olson
- 👤 Lester F. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:25
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/08; B01J8/12; B01J23/00; B01J23/90; B01J23/94; B01J23/96; B01J37/00; B01J37/22; C; C10; C10G; C10G35/00; C10G35/04; C10G35/10; C10G35/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
321 words
A method for continuously regenerating hydrocarbon conversion catalyst particles comprising a Group VIII metal and a halogen component in combination with a refractory inorganic oxide carrier material, and which have become deactivated (1) by deposition of carbonaceous matter thereon and, (2) through loss of halogen therefrom, in a regeneration zone comprising a first carbon-burning/halogenation section interconnected with and surmounted with respect to a second carbon-burning/halogenation section, said second being interconnected with and surmounted with respect to a lower drying section, wherein said catalyst particles are downwardly and countercurrently movable through a descending column via gravity-flow with respect to the upward flow of vapors within said regeneration zone, said regeneration method comprising the inter-related sequential steps of: (a) introducing (i) said deactivated catalyst particles, (ii) a first air stream from an external source and, (iii) a first mixture of steam and a halogen, or halogen-containing compound from an external source, into said first carbon-burning/halogenation section; (b) maintaining said catalyst particles within said first section for a time sufficient to (i) remove the greater portion of said carbonaceous matter therefrom and, (ii) increase the halogen content thereof; (c) introducing (i) said catalyst particles from said first section, via gravity-flow and (ii) a second air stream from an external source and, (iii) a second mixture of steam and a halogen, or a halogen-containing compound from an external source, into said second section; (d) maintaining said catalyst particles within said second section for a time sufficient to (i) remove substantially all of the remaining carbonaceous material therefrom and, (ii) further increase the halogen content thereof; (e) introducing (i) said catalyst particles from said second section, via gravity-flow and countercurrent with, (ii) a substantially dry third air stream from an external source into said lower drying section, and maintaining said catalyst particles therein for a time sufficient to remove substantially all the water therefrom; and, (f) withdrawing substantially water-free, regenerated catalyst particles from said regeneration zone.
Claim 2
Independent Claim
321 words
A method for continuously regenerating hydrocarbon conversion catalyst particles comprising a Group VIII metal and a halogen component in combination with a refractory inorganic oxide carrier material, and which have become deactivated (1) by deposition of carbonaceous matter thereon and, (2) through loss of halogen therefrom, in a regeneration zone comprising a first carbon-burning/halogenation section interconnected with and surmounted with respect to a second carbon-burning/halogenation section, said second being interconnected with and surmounted with respect to a lower drying section, wherein said catalyst particles are downwardly and countercurrently movable through a descending column via gravity-flow with respect to the upward flow of vapors within said regeneration zone, said regeneration method comprising the inter-related sequential steps of: (a) introducing (i) said deactivated catalyst particles, (ii) a first air stream from an external source and, (iii) a first mixture of steam and a halogen, or halogen-containing compound from an external source, into said first carbon-burning/halogenation section; (b) maintaining said catalyst particles within said first section for a time sufficient to (i) remove the greater portion of said carbonaceous matter therefrom and, (ii) increase the halogen content thereof; (c) introducing (i) said catalyst particles from said first section, via gravity-flow and (ii) a second air stream from an external source and, (iii) a second mixture of steam and a halogen, or a halogen-containing compound from an external source, into said second section; (d) maintaining said catalyst particles within said second section for a time sufficient to (i) remove substantially all of the remaining carbonaceous material therefrom and, (ii) further increase the halogen content thereof; (e) introducing (i) said catalyst particles from said second section, via gravity-flow and countercurrent with, (ii) a substantially dry third air stream from an external source into said lower drying section, and maintaining said catalyst particles therein for a time sufficient to remove substantially all the water therefrom; and, (f) withdrawing substantially water-free, regenerated catalyst particles from said regeneration zone.
Claim 3
Dependent Claim
30 words
The method of claim 1 further characterized in that said first and second carbon-burning/halogenation sections are maintained at a temperature in the range of about 750° to about 1050° F.
Claim 4
Dependent Claim
25 words
The method of claim 1 further characterized in that said lower drying section is maintained at a temperature of about 830° to about 1000° F.
Claim 5
Dependent Claim
32 words
The method of claim 1 further characterized in that said first air stream is introduced into said first carbon-burning/halogenation section through the same locus through which said first steam/halogen mixture is introduced.
Claim 6
Dependent Claim
32 words
The method of claim 1 further characterized in that said second air stream is introduced into said second carbon-burning/halogenation section through the same locus through which said second steam/halogen mixture is introduced.
Claim 7
Dependent Claim
32 words
The method of claim 1 further characterized in that the mole ratio of the air in said first and second streams to the air in said third stream is at least 1.0:1.0.
Claim 8
Dependent Claim
42 words
The method of claim 1 further characterized in that excess air and the combustion products resulting from the burning of carbon, are withdrawn from said first carbon-burning section, cooled and at least in part recycled to said first and second carbon-burning sections.
Claim 9
Dependent Claim
24 words
The method of claim 7 further characterized in that said excess air and combustion products are recycled to said carbon-burning/halogenation sections without intermediate treatment.
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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |