US3134732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of regenerated noble metal catalysts with gaseous halogens
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1953-07-17
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Granted: 1964-05-26
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Expires: 1973-07-17
Abstract
No abstract record available.
Inventors
- 👤 Kenneth K Kearby
- 👤 John P Thorn
- 👤 John A Hinlicky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:46
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A PROCESS FOR HYDROFORMING PETROLEUM FRACTIONS WITH AN ALUMINA-SUPPORTED PLATINUM CATALYST WHICH HAS DECLINED IN ACTIVITY DURING THE PROCESS AND CONTAINS CARBONACEOUS DEPOSITS, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF TREATING WITH AN OXYGEN CONTAINING GAS THE DEACTIVATED CATALYST AT ELEVATED TEMPERATURES TO BURN THE CARBONACEOUS DEPOSITS THEREFROM; CONTACTING THE CATALYST WITH GASEOUS HALOGEN IN AN AMOUNT OF FROM 0.1 TO 10 WEIGHT PERCENT BASED ON THE SUPPORTED CATALYST AT A MAXIMUM TEMPERATURE OF 1250*F. TO BRING ABOUT A REDUCTION IN THE SIZE OF THE PLATINUM CRYSTALLITES; REDUCING THE THUS TREATED ACTIVATED CATALYST IN THE HYDROFORMING PROCESS.
Claim 2
Dependent Claim
98 words
IN A PROCESS FOR HYDROFORMING PETROLEUM FRACTIONS WITH AN ALUMINA-SUPPORTED PLATINUM CATALYST WHICH HAS DECLINED IN ACTIVITY DURING THE PROCESS AND CONTAINS CARBONACEOUS DEPOSITS, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF TREATING WITH AN OXYGEN CONTAINING GAS THE DEACTIVATED CATALYST AT ELEVATED TEMPERATURES TO BURN THE CARBONACEOUS DEPOSITS THEREFROM; CONTACTING THE CATALYST WITH GASEOUS HALOGEN IN AN AMOUNT OF FROM 0.1 TO 10 WEIGHT PERCENT BASED ON THE SUPPORTED CATALYST AT A MAXIMUM TEMPERATURE OF 1250*F. TO BRING ABOUT A REDUCTION IN THE SIZE OF THE PLATINUM CRYSTALLITES; REDUCING THE THUS TREATED ACTIVATED CATALYST IN THE HYDROFORMING PROCESS.
References Cited (Backward Citations)
US2488744A
Cited
US2479110A
Cited
US2642384A
Cited
US2651599A
Cited
US2635080A
Cited
BE511278A
Cited
US2746909A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |