Patent US2717231A successfully refreshed from Google Patents.
US2717231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for treating aromatic-diolefin mixtures
Assignee: American Oil Co
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Filing: 1954-05-21
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Granted: 1955-09-06
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Expires: 1974-05-21
Abstract
No abstract record available.
Inventors
- 👤 Irvin H Lutz
- 👤 Oran W Collier
- 👤 David J Bellman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:50
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A METHOD WHICH COMPRISES INTRODUCING A VAPORIZED PETROLEUM NAPHTHA CHARGE INTO A SPACE ABOVE THE CATALYST BED IN A HYDROFORMING REACTOR; INTRODUCING AS A SEPARATE STREAM TO SAID SPACE BETWEEN ABOUT 5% AND ABOUT 30% BY VOLUME, BASED UPON TOTAL HYDROCARBON CHARGE, OF A LIQUID HYDROCARBON FRACTION RESULTING FROM THE PYROLYSIS OF A PETROLEUM FRACTION AND BOILING CHIEFLY IN THE GASOLINE BOILING RANGE WHICH CONTAINS A VOLUME PERCENTAGE OF DIOLEFINS SUBSTANTIALLY IN EXCESS OF THAT PRESENT IN A CRACKED NAPHTHA FRACTION AND A VOLUME OF AROMATICS SUBSTANTIALLY IN EXCESS OF SAID DIOLEFIN CONTENT, SAID HYDROCARBON FRACTION BEING INTRODUCED AT A TEMPERATURE BELOW THE POLYMERIZATION TEMPERATURE OF SAID DIOLEFINS; INTRODUCING INTO ADMIXTURE WITH SAID NAPHTHA AND SAID HYDROCARBON FRACTION IN SAID SPACE A SUBSTANTIAL AMOUNT OF UNCOMBINED HYDROGEN; AND NORMALLY LIQUID HYDROOF NAPHTHA PETROLEUM FRACTION, NORMALLY LIQUID HYDROFORMING AN AROMATIC HYDROCARBON, INITIALLY PRESENT IN FORMING CATALYST UNDER HYDROCARBON, INITIALLY PRESENT IN SAID HYDROCARBON FRACTION, FROM THE HYDROFORMER PRODUCT.
Claim 2
Independent Claim
157 words
A METHOD WHICH COMPRISES INTRODUCING A VAPORIZED PETROLEUM NAPHTHA CHARGE INTO A SPACE ABOVE THE CATALYST BED IN A HYDROFORMING REACTOR; INTRODUCING AS A SEPARATE STREAM TO SAID SPACE BETWEEN ABOUT 5% AND ABOUT 30% BY VOLUME, BASED UPON TOTAL HYDROCARBON CHARGE, OF A LIQUID HYDROCARBON FRACTION RESULTING FROM THE PYROLYSIS OF A PETROLEUM FRACTION AND BOILING CHIEFLY IN THE GASOLINE BOILING RANGE WHICH CONTAINS A VOLUME PERCENTAGE OF DIOLEFINS SUBSTANTIALLY IN EXCESS OF THAT PRESENT IN A CRACKED NAPHTHA FRACTION AND A VOLUME OF AROMATICS SUBSTANTIALLY IN EXCESS OF SAID DIOLEFIN CONTENT, SAID HYDROCARBON FRACTION BEING INTRODUCED AT A TEMPERATURE BELOW THE POLYMERIZATION TEMPERATURE OF SAID DIOLEFINS; INTRODUCING INTO ADMIXTURE WITH SAID NAPHTHA AND SAID HYDROCARBON FRACTION IN SAID SPACE A SUBSTANTIAL AMOUNT OF UNCOMBINED HYDROGEN; AND NORMALLY LIQUID HYDROOF NAPHTHA PETROLEUM FRACTION, NORMALLY LIQUID HYDROFORMING AN AROMATIC HYDROCARBON, INITIALLY PRESENT IN FORMING CATALYST UNDER HYDROCARBON, INITIALLY PRESENT IN SAID HYDROCARBON FRACTION, FROM THE HYDROFORMER PRODUCT.
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) | 1958-09-05 | 1959-03-07 | 1959-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-05 | 1963-03-07 | 1963-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-05 | 1967-03-07 | 1967-09-06 | $7700.00 | Window Closed / Lapsed |