US2734019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofining naphthenic lubricating oil
Assignee: —
•
Filing: —
•
Granted: 1956-02-07
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Expires: 1973-02-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:58
CPC Classifications
C; C10; C10G; C10G71/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A METHOD FOR TREATING A NAPHTHENIC LUBRICATING OIL FRACTION CONTAINING AROMATIC HYDROCARBONS AND SULFUR, NAPTHENIC ACIDS, AND NITROGEN WHICH COMPRISES CONTACTING SAID FRACTION WITH A COBALT MOLYBDATE ON SILCA-FREE ALUMINA CATALYST AT A TEMPERATURE IN THE RANGE FROM 650* TO 750*F., AT A PRESSURE IN THE RANGE FROM 500 TO 800 POUNDS PER SQUARE INCH GUAGE IN THE PRESENCE OF HYDROGEN IN AN AMOUNT IN THE RANGE FROM 200 TO 2000 STANDARD CUBIC FEET PER BARREL OF SAID FRACTION WITH A HYDROGEN CONSUMPTION IN THE RANGE FROM ABOUT 50 TO ABOUT 400 STANDARD CUBIC FEET PER BARREL OF SAID FRACTION, AND AT A LIQUID SPACE VELOCITY IN THE RANGE FROM 0.25 TO 6.0 VOLUMES OF SAID FRACTION PER VOLUME OF CATALYST PER HOUR SUCH THAT ONLY A PORTION OF SAID AROMATIC HYDROCARBONS IS CONVERTED AND THE SULFUR, NAPTHENIC ACIDS, AND NITROGEN CONTENT OF SAID FRACTION IS SUBSTANTIALLY REDUCED, THE PARAFFINS AND NAPHTHENES IN SAID FRACTION BEING SUBSTANTIALLY UNCONVERTED.
Claim 2
Independent Claim
158 words
A METHOD FOR TREATING A NAPHTHENIC LUBRICATING OIL FRACTION CONTAINING AROMATIC HYDROCARBONS AND SULFUR, NAPTHENIC ACIDS, AND NITROGEN WHICH COMPRISES CONTACTING SAID FRACTION WITH A COBALT MOLYBDATE ON SILCA-FREE ALUMINA CATALYST AT A TEMPERATURE IN THE RANGE FROM 650* TO 750*F., AT A PRESSURE IN THE RANGE FROM 500 TO 800 POUNDS PER SQUARE INCH GUAGE IN THE PRESENCE OF HYDROGEN IN AN AMOUNT IN THE RANGE FROM 200 TO 2000 STANDARD CUBIC FEET PER BARREL OF SAID FRACTION WITH A HYDROGEN CONSUMPTION IN THE RANGE FROM ABOUT 50 TO ABOUT 400 STANDARD CUBIC FEET PER BARREL OF SAID FRACTION, AND AT A LIQUID SPACE VELOCITY IN THE RANGE FROM 0.25 TO 6.0 VOLUMES OF SAID FRACTION PER VOLUME OF CATALYST PER HOUR SUCH THAT ONLY A PORTION OF SAID AROMATIC HYDROCARBONS IS CONVERTED AND THE SULFUR, NAPTHENIC ACIDS, AND NITROGEN CONTENT OF SAID FRACTION IS SUBSTANTIALLY REDUCED, THE PARAFFINS AND NAPHTHENES IN SAID FRACTION BEING SUBSTANTIALLY UNCONVERTED.
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) | 1959-02-06 | 1959-08-08 | 1960-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-06 | 1963-08-08 | 1964-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-06 | 1967-08-08 | 1968-02-07 | $7700.00 | Window Closed / Lapsed |