Process for the manufacture of lubricating oils by hydrocracking
Abstract
Abstract LUBRICATING OILS HAVING UV STABILITY, LOW COLOR INTENSITY ARE UNIFORM VISCOSITY INDEX (VIE)DISTRIBUTION ARE PREPARED FROM HYDROCARBON FEEDSTOCKS IN A TWO-STAGE PROCESS IN WHICH THE FEEDSTOCK IS FIRST HYDROGENATED AND MILDLY HYDROCRACKED OVER A FIRST HYDROCRACKING CATALYST, AND THEN FURTHER HYDROGENATED AND HYDROCRACKED OVER A SECOND HYDROCRACKING CATALYST MIXTURE COMPRISING (1) AN AMORPHOUS BASE COMPONENT, (2) A CRYSTALLINE ALUMINOSILICATE COMPONENT PREFERABLY COMPRISING 10-30 WT. PERCENT OF THE TOTAL CATALYST AND HAVING A SIO2:AL2O3 MOLE RATIO OF AT LEAST 2.5 AND AN ALKALI METAL CONTENT OF LESS THAN ABOUT 2.0 WT. PERCENT (AS ALKALI OXIDE) AND (3) A TRANSITION METAL HYDROGENATION COMPONENT.
Inventors
- 👤 J Sosnowski
- 👤 H Henry
- 👤 J Gilbert
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |