Patent US2958643A successfully refreshed from Google Patents.
US2958643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-stage catalytic conversion process for producing naphthalene and an aromatic gasoline from cycle oils
Assignee: Sinclair Refining Co
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Filing: 1956-08-29
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Granted: 1960-11-01
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Expires: 1976-08-29
Abstract
No abstract record available.
Inventors
- 👤 Bernard S Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:44
CPC Classifications
C; C10; C10G; C10G59/00; C10G59/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
THE METHOD OF PRODUCING NAPTHALENE AND HIGH OCTANE AROMATIC GSOLINE WHICH COMPRISES CONTACTING IN A FIRST STAGE IN THE PRESENCE OF HYDROGEN A PETROLEUM LIGHT CYCLE OIL CONSISTING ESSENTIALLY OF AROMATICS AND ABOUT 40 TO 65 PERCENT OF NON-AROMATICS COMPONENTS WITH A HYDROFORMING CATALYST HAVING A NON-COMBUSTIBLE BASE AT A TEMPERATURE OF ABOUT 900 TO 1200*F., A SPACE WHEREBY OF ABOUT 0.1 TO 20 LHSV AND A PRESSURE OF AT LEAST ABOUT ATMOSPHERIC WHILE EFFECTING CONVERSION TO AN AROMATIC OIL BOILING ABOVE 400*F. AND CONTAINING AT LEAST ABOUT 40 WEIGHT PERCENT OF NAPTHALENIC AROMATICS AND NOT MORE THAN ABOUT 30 WEIGHT PERCENT OF NON-AROMATICS, SAID AROMATIC OIL CONTAINING NOT MORE THAN ABOUT 10 WEIGHT PERCENT OF NAPHTHALENE, CONTACTING IN A SECOND STAGE UNDER MORE SEVERE REACTION CONDITIONS THE AROMATIC OIL WITH A HYDROFORMING CATALYST HAVING A NON-COMBUSTIBLE BASE, IN THE PRESENCE OF HYDROGEN AND AT A TEMPERATURE OF ABOUT 900 TO 1200*F., A SPACE VELOCITY OF ABOUT 0.1 TO 3 LHSV AND A PRESSURE OF AT LEAST ABOUT ATMOS-
Claim 2
Independent Claim
169 words
THE METHOD OF PRODUCING NAPTHALENE AND HIGH OCTANE AROMATIC GSOLINE WHICH COMPRISES CONTACTING IN A FIRST STAGE IN THE PRESENCE OF HYDROGEN A PETROLEUM LIGHT CYCLE OIL CONSISTING ESSENTIALLY OF AROMATICS AND ABOUT 40 TO 65 PERCENT OF NON-AROMATICS COMPONENTS WITH A HYDROFORMING CATALYST HAVING A NON-COMBUSTIBLE BASE AT A TEMPERATURE OF ABOUT 900 TO 1200*F., A SPACE WHEREBY OF ABOUT 0.1 TO 20 LHSV AND A PRESSURE OF AT LEAST ABOUT ATMOSPHERIC WHILE EFFECTING CONVERSION TO AN AROMATIC OIL BOILING ABOVE 400*F. AND CONTAINING AT LEAST ABOUT 40 WEIGHT PERCENT OF NAPTHALENIC AROMATICS AND NOT MORE THAN ABOUT 30 WEIGHT PERCENT OF NON-AROMATICS, SAID AROMATIC OIL CONTAINING NOT MORE THAN ABOUT 10 WEIGHT PERCENT OF NAPHTHALENE, CONTACTING IN A SECOND STAGE UNDER MORE SEVERE REACTION CONDITIONS THE AROMATIC OIL WITH A HYDROFORMING CATALYST HAVING A NON-COMBUSTIBLE BASE, IN THE PRESENCE OF HYDROGEN AND AT A TEMPERATURE OF ABOUT 900 TO 1200*F., A SPACE VELOCITY OF ABOUT 0.1 TO 3 LHSV AND A PRESSURE OF AT LEAST ABOUT ATMOS-
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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) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |