US2925453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and catalyst for the isomerization of hydrocarbons
Assignee: Pure Oil Co
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Filing: 1957-12-16
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Granted: 1960-02-16
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Expires: 1977-12-16
Abstract
No abstract record available.
Inventors
- 👤 Hillis O Folkins
- 👤 Elmer L Miller
- 👤 Kenneth E Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:11
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2724; C07C5/2767; C07C5/277; C07C5/2791
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A HYDROISOMERIZATION PROCESS WHICH COMPRISES PROCESSING A ISOMERIZABLE, SATURATED HYDROCARBON HAVING 4-7 CARBON ATOMS PER MOLECULE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 600-800* F., SUFFICIENT TO EFFECT THE ISOMERIZATION OF SAID HYDROCARBON IN THE SUBSTANTIAL ABSENCE OF HYDROCRACKING, AT ISOMERIZING CONDITIONS OF PRESSURE AND H2/HYDROCARBON MOL RATIO IN THE PRESENCE OF AN ISOMERIZATION CATALYST CONSISTING ESSENTIALLY OF A SILICA-ALUMINA, HYDROCARBON-CRACKING CATALYST COMPOSITE CONTAINING 50-95% BY WEIGHT OF SILICA AND HAVING INCORPORATED THEREIN A SMALL AMOUNT OF A CO-PROMOTER CONSISTING ESSENTIALLY OF PALLADIUM AND RHODIUM, EACH BEING PRESENT IN AN AMOUNT SUFFICIENT TO ENHANCE THE ISOMERIZATION ACTIVITY OF SAID SILICA-ALUMINA CATALYST, THE QUANTITY OF PALLADIUM PRESENT IN THE CATALYST EXCEEDING THE AMOUNT OF RHOSIUM.
Claim 2
Dependent Claim
115 words
A HYDROISOMERIZATION PROCESS WHICH COMPRISES PROCESSING A ISOMERIZABLE, SATURATED HYDROCARBON HAVING 4-7 CARBON ATOMS PER MOLECULE AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 600-800* F., SUFFICIENT TO EFFECT THE ISOMERIZATION OF SAID HYDROCARBON IN THE SUBSTANTIAL ABSENCE OF HYDROCRACKING, AT ISOMERIZING CONDITIONS OF PRESSURE AND H2/HYDROCARBON MOL RATIO IN THE PRESENCE OF AN ISOMERIZATION CATALYST CONSISTING ESSENTIALLY OF A SILICA-ALUMINA, HYDROCARBON-CRACKING CATALYST COMPOSITE CONTAINING 50-95% BY WEIGHT OF SILICA AND HAVING INCORPORATED THEREIN A SMALL AMOUNT OF A CO-PROMOTER CONSISTING ESSENTIALLY OF PALLADIUM AND RHODIUM, EACH BEING PRESENT IN AN AMOUNT SUFFICIENT TO ENHANCE THE ISOMERIZATION ACTIVITY OF SAID SILICA-ALUMINA CATALYST, THE QUANTITY OF PALLADIUM PRESENT IN THE CATALYST EXCEEDING THE AMOUNT OF RHOSIUM.
Claim 3
Dependent Claim
61 words
A CATALYST CONSISTING ESSENTIALLY OF A SILICA-ALUMINA, HYDROCARBON-CRACKING CATALYST COMPOSITE CONTAINING 5095% BY WEIGHT OF SILICA AND HAVING INCORPORATED THEREIN A SMALL AMOUNT OF A CO-PROMOTER CONSISTING ESSENTIALLY OF PALLADIUM AND RHODIUM, EACH BEING PRESENT IN AN AMOUNT SUFFICIENT TO ENHANCE THE ISOMERIZATION ACTIVITY OF SAID SILICA-ALUMINA CATALYST, THE QUANTITY O PALLADIUM PRESENT IN THE CATALYST EXCEEDING THE AMOUNT OF RHODIUM
Claim 4
Dependent Claim
61 words
A CATALYST CONSISTING ESSENTIALLY OF A SILICA-ALUMINA, HYDROCARBON-CRACKING CATALYST COMPOSITE CONTAINING 5095% BY WEIGHT OF SILICA AND HAVING INCORPORATED THEREIN A SMALL AMOUNT OF A CO-PROMOTER CONSISTING ESSENTIALLY OF PALLADIUM AND RHODIUM, EACH BEING PRESENT IN AN AMOUNT SUFFICIENT TO ENHANCE THE ISOMERIZATION ACTIVITY OF SAID SILICA-ALUMINA CATALYST, THE QUANTITY O PALLADIUM PRESENT IN THE CATALYST EXCEEDING THE AMOUNT OF RHODIUM
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) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |