Production of white oils from hydrotreated and acid contacted oil stocks
Abstract
Abstract WHITE OILS ARE PRODUCED FROM A LUBRICATING OIL STOCK CONTAINING 5-30% AROMATICS BY VOLUME. THE PROCESS SUBJECTS THE LUBRICATING OIL STOCK TO HYDRO-TREATMENT AT 650-725*F. AT A PRESSURE BETWEEN 2,500-3,000 P.S.I.G. AND LHSV OF 0.5-3 WITH A CATALYST CONTAINING A HYDROGENATING COMPONENT SELECTED FROM GROUP VI AND GROUP VIII METALS AND A CARRIER FOR SAID METAL COMPONENT HAVING AN ACTIVITY INDEX OF LESS THAN 25. THE HYDROTREATMENT STEP REDUCES THE AROMATIC CONTENT TO LESS THAN 4% BY VOLUME AND NO SUBSTANTIAL HYDROCRACKING OCCURS. THE HYDROTREATED MATERIAL IS CONTACTED WITH FUMING SULFURIC ACID, 0.02-0.06 VOL. OF ACID/VOLUME OF OIL, THE OIL IS NEUTRALIZED WITH CAUSTIC AND EXTRACTED WITH ALCOHOL TO REMOVE SULFONATES. THE ALCOHOL-EXTRACTED MATERIAL MAY BE FURTHER SUBJECTED TO DEHYDRATION AND THEN CONTACTED WITH CLAY. THE PROCESS PROVIDES A MINIMAL PRODUCTION OF ACID SLUDGE AND SULFONATE BY-PRODUCT WITH EXTREMELY HIGH YIELD OF FINAL WHITE OIL.
Inventors
- 👤 Robert E Donaldson
- 👤 Harry C Murphy Jr
- 👤 Harry C Stauffer
Bibliographic Details
Claims Analysis
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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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |