Making a cable oil by acid extraction and hydrofining
Abstract
Abstract LOW ADF, 2000-12,000 SUS (AT 100*F.) CABLE OILS ARE PREPARED FROM NAPHTHENIC LUBE FRACTIONS BY A PROCESS COMPRISING ACID-TREATING (E.G., SO3,HF,H2SO4), NEUTRALIZING AND HYDROREFINING AT 550*-750*F. AND 800-3000 P.S.I. OF HYDROGEN. PRIOR TO HYDROREFINING, THE NEUTRALIZED OIL CAN BE CONTACTED WITH AN ADSORBENT COMPRISING BAUXITE OR A NATURALLY-OCCURING FULLER''S EARTH BLEACHING CLAY, SUCH AS ATTAPULGITE, AS A PRECAUTION TO INSURE THAT THE HYDROREFINING CATALYST WILL NOT BE POISONED BY TRACE IMPURITIES. THE NAPHTHENIC LUBE FRACTION IS PREFERABLY SUBSTANTIALLY FREE FROM NAPHTHENIC ACIDS AND CAN BE A RAFFINATE FROM EXTRACTING OF A DISTILLATE WITH AN AROMATIC SELECTIVE SOLVENT (E.G. FURFURAL, PHENOL, ETC.).
Inventors
- 👤 Ivor W Mills
- 👤 Glenn R Dimeler
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |