Process for the purification of mineral oil
Abstract
Abstract A PROCESS FOR THE PURIFICATION OF MINERAL OIL INCLUDING A LUBE FRACTION COMPRISING: REACTING SAID MINERAL OIL WITH OXYGEN-CONTAINING GASES IN THE PRESENCE OF AT LEAST ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID AND PHOSPHORIC ACID AS A CATALYST AT A TEMPERATURE RANGING FROM 180*C. TO 280*C. THEREBY CONVERTING UNSTABLE COMPOUNDS SUCH AS SULFUR-CONTAINING COMPOUNDS, OXYGEN-CONTAINING COMPOUNDS, NITROGEN-CONTAINING COMPOUNDS, AND ORGANOMETALLIC COMPOUNDS PRESENT IN SAID MINERAL OIL INT COMPOUNDS OF GREATER MOLECULAR WEIGHT AND INCREASED POLARITY AND SEPARATING SAID COMPOUNDS FROM SAID MINERAL OIL BY VACUUM DISTILLATION TO OBTAIN A REFINED MINERAL OIL PRODUCT, AND FURTHER TREATING SAID REFINED MINERAL OIL PRODUCT IN A FIXED BED, SUSPENSION BED, OR FLUIDIZED BED WIT A CONVENTIONAL HYDROGENTAING CATALYST UNDER HYDROGEN PRESSURE AT A TEMPERATURE RANGING FROM 150*C. TO 450*C.
Inventors
- 👤 S Yamada
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |