US3400073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regeneration of platinum and palladium reforming catalysts
Assignee: Pullman Inc
•
Filing: 1952-06-20
•
Granted: 1968-09-03
•
Expires: 1972-06-20
Abstract
No abstract record available.
Inventors
- 👤 Eugene F Schwarzenbek
- 👤 Turkevich John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:01
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE METHOD OF RESTORING ACTIVITY OF A PLATINUM ALUMINA HYDROFORMING CATALYST WHICH HAS BECOME PARTIALLY DEACTIVATED AND CONTAMINATED WITH CARBON, WHICH METHOD COMPRISES REMOVING READILY COMBUSTIBLE CARBON FROM AND TREATING THE PARTIALLY DEACTIVATED CATALYST UNDER OSIDIZING CONDITIONS, SAID TREATING BEING WITH AN OXYGEN-CONTAINING GAS HAVING AN OXYGEN PARTIAL PRESSURE OF AT LEAST ABOUT 5 P.S.I.A., AT A TEMPERATURE ABOUT 900*F. FOR A PERIOD OF AT LEAST 10 MINUTES, AND THEN TREATING THE CATALYST WITH A HYDROGEN-CONTAINING GAS, THE PERIOD OF TIME FOR WHICH SAID TREATING WITH AN OXYGEN-CONTAINING GAS CONTINUES BEING SUFFICIENT TO RESTORE SUBSTANTIALLY THE HYDROFORMING PROPERTIES OF THE CATALYST AS FRESHLY PREPARED.
Claim 2
Independent Claim
104 words
THE METHOD OF RESTORING ACTIVITY OF A PLATINUM ALUMINA HYDROFORMING CATALYST WHICH HAS BECOME PARTIALLY DEACTIVATED AND CONTAMINATED WITH CARBON, WHICH METHOD COMPRISES REMOVING READILY COMBUSTIBLE CARBON FROM AND TREATING THE PARTIALLY DEACTIVATED CATALYST UNDER OSIDIZING CONDITIONS, SAID TREATING BEING WITH AN OXYGEN-CONTAINING GAS HAVING AN OXYGEN PARTIAL PRESSURE OF AT LEAST ABOUT 5 P.S.I.A., AT A TEMPERATURE ABOUT 900*F. FOR A PERIOD OF AT LEAST 10 MINUTES, AND THEN TREATING THE CATALYST WITH A HYDROGEN-CONTAINING GAS, THE PERIOD OF TIME FOR WHICH SAID TREATING WITH AN OXYGEN-CONTAINING GAS CONTINUES BEING SUFFICIENT TO RESTORE SUBSTANTIALLY THE HYDROFORMING PROPERTIES OF THE CATALYST AS FRESHLY PREPARED.
References Cited (Backward Citations)
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US2664404A
Cited
US2641582A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |