US3728250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integral hydrofining-hydrogenation process
Assignee: Union Oil Company of California
•
Filing: 1970-07-02
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Granted: 1973-04-17
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Expires: 1990-07-02
Abstract
Abstract AROMATIC MINERAL OIL FEEDSTOCK BOILING BELOW ABOUT 700*F. AND ALSO CONTAINING SUBSTANTIAL AMOUNTS OFORGANIC NITROGEN ARE FIRST HYDROFINED OVER A CATALYST COMPRISING NICKEL PLUS MOLYBDENUM AND/OR TUNGSTEN TO REDUCE THEORGANIC NITROGEN CONTENT TO BELOW ABOUT 20 PARTS PER MILLION, AND TTAL EFFLUENT THEREFROM IS THEN HYDROGENATED OVER THE SAME TYPE OF CATALYST AT PRESSURES ABOVE ABOUT 1,000 P.S.I.G. TO EFFECT A SUBSTANTIAL SATURATION OF AROMATIC HYDROCARBONS. THE MOST SIGNIFICANT NOVEL FEATURE OF THE INVENTION LIES IN EFFECTING HYDROGENATION OF MONO-AROMATIC HYDROCARBONS WITH THE SPECIFIED CATALYSTS IN THE PRESENCE OF BOTH AMMONIA AND HYDROGEN SULFIDE.
Inventors
- 👤 R Hass
- 👤 N Kay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:19
CPC Classifications
C; C10; C10G; C10G65/00; C10G65/02; C10G65/04; C10G65/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |