US3000838A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Platinum reforming catalyst and process for preparing the same
Assignee: Wyeth Holdings LLC
•
Filing: 1958-10-08
•
Granted: 1961-09-19
•
Expires: 1978-10-08
Abstract
No abstract record available.
Inventors
- 👤 Malden W Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:53
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/128; B01J27/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A PROCESS FOR IMPROVING PLATINUM-ALUMINA REFORMING CATALYSTS HAVING HIGH ACTIVITY AND LOW FLUORINE CONTENT, WHICH COMPRISES IMPREGNATING AGED ALUMINA SOL CONSTITUTING FROM BETWEEN ABOUT 20% AND ABOUT 80% OF THE A12O3 CONTENT OF THE FINAL CATALYST COMPOSITION WITH FLUORIDE, SAID INPREGNATION BEING SUFFICIENT TO ADD FROM BETWEEN ABOVE AB OUT 0.1 AND LESS THAN ABOUT 0.6% OF FLUORIDE BY WEIGHT TO THE FINAL CATALYST COMPOSITION WITH OUGHLY MIXING SAID IMPREGNATED SOL WITH DRY AGED ALUMINA SOL THAT HAS NOT BEEN FLUORIDE IMPREGNATED, SAID ADDITIONAL ALUMINA CONSISTING FROM BETWEEN ABOUT 80% AND ABOUT 20% OF THE AI2O3 CONTENT OF THE FINAL CATALYST COMPOSITION, CO-MINGLING THE MIXTURE WITH A SOLUTION OF A PLATINUM COMPOUND, SAID PLATINUM COMPOUND BEING SUFFICIENT TO PROVIDE FROM BETWEEN 0.05% AND 1% OF PLATINUM BASED ON THE WEIGHT OF THE FINAL CATALYST COMPOSITION, DRYING THE RESULTING MIXTURE, PELLETING THE MIXTURE AND CALCINING THE PELLETS.
Claim 2
Dependent Claim
146 words
A PROCESS FOR IMPROVING PLATINUM-ALUMINA REFORMING CATALYSTS HAVING HIGH ACTIVITY AND LOW FLUORINE CONTENT, WHICH COMPRISES IMPREGNATING AGED ALUMINA SOL CONSTITUTING FROM BETWEEN ABOUT 20% AND ABOUT 80% OF THE A12O3 CONTENT OF THE FINAL CATALYST COMPOSITION WITH FLUORIDE, SAID INPREGNATION BEING SUFFICIENT TO ADD FROM BETWEEN ABOVE AB OUT 0.1 AND LESS THAN ABOUT 0.6% OF FLUORIDE BY WEIGHT TO THE FINAL CATALYST COMPOSITION WITH OUGHLY MIXING SAID IMPREGNATED SOL WITH DRY AGED ALUMINA SOL THAT HAS NOT BEEN FLUORIDE IMPREGNATED, SAID ADDITIONAL ALUMINA CONSISTING FROM BETWEEN ABOUT 80% AND ABOUT 20% OF THE AI2O3 CONTENT OF THE FINAL CATALYST COMPOSITION, CO-MINGLING THE MIXTURE WITH A SOLUTION OF A PLATINUM COMPOUND, SAID PLATINUM COMPOUND BEING SUFFICIENT TO PROVIDE FROM BETWEEN 0.05% AND 1% OF PLATINUM BASED ON THE WEIGHT OF THE FINAL CATALYST COMPOSITION, DRYING THE RESULTING MIXTURE, PELLETING THE MIXTURE AND CALCINING THE PELLETS.
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) | 1964-09-18 | 1965-03-20 | 1965-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-18 | 1969-03-20 | 1969-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-18 | 1973-03-20 | 1973-09-19 | $7700.00 | Window Closed / Lapsed |