Patent US2686151A successfully refreshed from Google Patents.
US2686151A
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Recovery of hydrogen fluoride from the regeneration gases of a catalytic cracking process
Assignee: Standard Oil Development Co
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Filing: 1950-12-16
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Granted: 1954-08-10
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Expires: 1970-12-16
Abstract
No abstract record available.
Inventors
- 👤 Jr George F Feldbauer
- 👤 Charles E Jahnig
- 👤 Homer Z Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:03
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28; B01J21/00; Y; Y10; Y10S; Y10S502/00; Y10S502/515
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
IN A PROCESS WHEREIN A HYDROCARBON FEED IS CRACKED IN A CONVERSION ZONE IN THE PRESENCE OF A DENSE TURBULENT BED OF A FINELY DIVIDED FLUORIDECONTAINING SOLID CRACKING CATALYST, A VAPOR STREAM CONTAINING CRACKED HYDROCARBON PRODUCT AND HYDROGEN SULFIDE IS RECOVERED THEREFROM, COKEDEACTIVATED CATALYST IS WITHDRAWN FROM THE CONVERSION ZONE AND REGENERATED IN AN OXYGEN-CONTAINING COMBUSTION ZONE WHERE IT IS MAINTAINED AS A DENSE TURBULENT BED WHILE THE COKE IS BURNED OFF, REGENERATION GASES CONTAINING HYDROGEN FLUORIDE ARE WITHDRAWN FROM THE COMBUSTION ZONE AND REGENERATED CATALYST IS RECYCLED TO THE CONVERSION ZONE, THE IMPROVEMENT WHICH COMPRISES MIX-
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) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |