Production of fuel oils
Abstract
Abstract FUEL OILS OR FUEL OIL COMPONENTS ARE PRODUCED FROM WAXY ATMOSPHERE RESIDUES BY VACUUM DISTILLING THE RESIDUE TO GIVE A WAX DISTILLATE FRACTION AND A VACUUM RESIDUE, SELECTIVELY DEWAXING THE WAX DISTILLATE FRACTION AND REBLENDING AT LEAST A PORTION OF THE DEWAXED WAX DISTILLATE FRACTION WITH AT LEAST A PORTION OF THE VACUUM RESIDUE. THE PROCESS IS PARTICULARLY SUITABLE FOR ATMOSPHERIC RESIDUES WITH 15-35% WT. WAX. THE PREFERRED SELECTIVE DEWAXING PROCESS IS CATALYTIC, INVOLVING PASSING THE WAX DISTILLATE WITH HYDROGEN OVER A CATALYST OF A GROUP VIA AND/OR GROUP VIII HYDROGENATING COMPONENT INCORPORATED WITH MORDENITE OF REDUCED ALKALI METAL CONTENT. THE MORDENITE IS PREFERABLY DECATIONISED AND HAS A SIO2:A12O3 RATIO OF AT LEAST 14:1. THE DEWAXING CONDITIONS MAY BE 450-950*F., 250-3000 P.S.I.G., 0.2-20 V./V./HR. AND 1000-3000 S.C.F. OF H2/B.
Inventors
- 👤 Robert William Aitken
- 👤 Bernard Whiting Burbidge
- 👤 Brian Edward Harold Pettyfer
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |