Patent US2651599A successfully refreshed from Google Patents.
US2651599A
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Treating conversion catalysts
Assignee: Standard Oil Development Co
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Filing: 1949-09-08
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Granted: 1953-09-08
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Expires: 1969-09-08
Abstract
No abstract record available.
Inventors
- 👤 Rhea N Watts
- 👤 Julius P Bilisoly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:16
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; B; B01; B01J; B01J21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN A PROCESS FOR REACTIVATING A CIRCULATING CRACKING CATALYST CONSISTING ESSENTIALLY OF A SYNTHETIC COMPOSITE SELECTED FROM THE GROUP CONSISTING OF SILICA-ALUMINA, SILICA-MAGNESIA AND SILICA-MAGNESIAL-ALUMINA WHICH HAS BEEN SUBJECTED TO REPEATED REGENERATIONS FOLLOWING CONVERSION OPERATIONS WITHOUT REMOVAL FROM THE SYSTEM AND WHICH HAS LOST ACTIVITY AND SELECTIVITY, THE IMPROVEMENT WHICH COMPRISES TREATING THE REGENERATED CATALYST FOLLOWING THE REGENERATION STEP WITH A GAS MIXTURE CONSISTING ESSENTIALLY OF STEAM CONTAINING ADMIXED THEREWITH ABOUT 0.01 TO 10 WEIGHT PERCENT OF HYDROGEN FLUORIDE AT A TEMPERATURE OF AT LEAST 850* F., THE TOTAL AMOUNT OF HYDROGEN FLUORIDE SO USED BEING IN THE RATIO BETWEEN ABOUT 0.01 TO 10 POUNDS PER 100 POUNDS OF CATALYST PER 24 HOURS, AND THEN USING THE RESULTING REVIVIFIED AND REGENERATED CATALYST IN THE CONVERSION STEP WITHOUT FURTHER TREATING THE CATALYST TO REMOVE HYDROFLUORIC ACID GAS THEREFROM.
Claim 2
Dependent Claim
137 words
IN A PROCESS FOR REACTIVATING A CIRCULATING CRACKING CATALYST CONSISTING ESSENTIALLY OF A SYNTHETIC COMPOSITE SELECTED FROM THE GROUP CONSISTING OF SILICA-ALUMINA, SILICA-MAGNESIA AND SILICA-MAGNESIAL-ALUMINA WHICH HAS BEEN SUBJECTED TO REPEATED REGENERATIONS FOLLOWING CONVERSION OPERATIONS WITHOUT REMOVAL FROM THE SYSTEM AND WHICH HAS LOST ACTIVITY AND SELECTIVITY, THE IMPROVEMENT WHICH COMPRISES TREATING THE REGENERATED CATALYST FOLLOWING THE REGENERATION STEP WITH A GAS MIXTURE CONSISTING ESSENTIALLY OF STEAM CONTAINING ADMIXED THEREWITH ABOUT 0.01 TO 10 WEIGHT PERCENT OF HYDROGEN FLUORIDE AT A TEMPERATURE OF AT LEAST 850* F., THE TOTAL AMOUNT OF HYDROGEN FLUORIDE SO USED BEING IN THE RATIO BETWEEN ABOUT 0.01 TO 10 POUNDS PER 100 POUNDS OF CATALYST PER 24 HOURS, AND THEN USING THE RESULTING REVIVIFIED AND REGENERATED CATALYST IN THE CONVERSION STEP WITHOUT FURTHER TREATING THE CATALYST TO REMOVE HYDROFLUORIC ACID GAS THEREFROM.
References Cited (Backward Citations)
US2430735A
Cited
US2525812A
Cited
US2558375A
Cited
US2488718A
Cited
US2481253A
Cited
US2580004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |