US2739945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precipitated hydroforming catalysts
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-06-21
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Granted: 1956-03-27
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Expires: 1972-06-21
Abstract
No abstract record available.
Inventors
- 👤 John P Thorn
- 👤 Walter R F Guyer
- 👤 Arundale Erving
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:04
CPC Classifications
B; B01; B01J; B01J27/00; B01J27/06; B01J27/128; B01J27/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF PREPARING A PLATINUM-ON-ALUMINA CATALYST FOR THE TREATMENT AND CONVERSION OF HYDROCARBONS WHICH COMPRISES DISSOLVING IN AN AQUEOUS SOLUTION OF AN ALUMINUM SALT AN AMOUNT OF A PLATINUM HALIDE COMPOUND EQUIVALENT FROM ABOUT 0.05 TO 2% BY WEIGHT OF METALLIC PLATINUM IN THE FINISHED CATALYST, COMBINING SAID SOLUTION WITH AN AMMONIACAL SOLUTION TO GET AN ALKALINE MIXTURE, PRECIPITATING A HYDROUS ALUMINA THEREFROM AND CARRYING PLATINUM DOWN THEREWITH AS A DISPERSION UNIFORMLY DISTRIBUTED THROUGHOUT SAID PRECIPITATED ALUMINA, SEPARATING SAID PRECIPITATE FROM THE AQUEOUS PHASE, DRYING, CALCINING AND REDUCING SAID PLATINUM DISPERSION TO METALLIC PLATINUM TO RECOVER AN ACTIVE HYDROFORMING CATALYST.
Claim 2
Independent Claim
101 words
THE METHOD OF PREPARING A PLATINUM-ON-ALUMINA CATALYST FOR THE TREATMENT AND CONVERSION OF HYDROCARBONS WHICH COMPRISES DISSOLVING IN AN AQUEOUS SOLUTION OF AN ALUMINUM SALT AN AMOUNT OF A PLATINUM HALIDE COMPOUND EQUIVALENT FROM ABOUT 0.05 TO 2% BY WEIGHT OF METALLIC PLATINUM IN THE FINISHED CATALYST, COMBINING SAID SOLUTION WITH AN AMMONIACAL SOLUTION TO GET AN ALKALINE MIXTURE, PRECIPITATING A HYDROUS ALUMINA THEREFROM AND CARRYING PLATINUM DOWN THEREWITH AS A DISPERSION UNIFORMLY DISTRIBUTED THROUGHOUT SAID PRECIPITATED ALUMINA, SEPARATING SAID PRECIPITATE FROM THE AQUEOUS PHASE, DRYING, CALCINING AND REDUCING SAID PLATINUM DISPERSION TO METALLIC PLATINUM TO RECOVER AN ACTIVE HYDROFORMING CATALYST.
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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |