US2590490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for refining lubricating oil
Assignee: Phillips Petroleum Co
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Filing: 1948-05-24
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Granted: 1952-03-25
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Expires: 1968-05-24
Abstract
No abstract record available.
Inventors
- 👤 Bruce C Benedict
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:05
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A PROCESS FOR REFINING LUBRICATING OIL WHICH COMPRISES INTRODUCING A LUBRICATING OIL STOCK, A NORMAL PARAFFIN HYDROCARBON SOLVENT CONTAINING NOT MORE THAN 4 CARBON ATOMS PER MOLECULE AND A HYDROGEN FLUORIDE-RICH PHASE FROM A REACTION ZONE TO AN EXTRACTION ZONE WHEREIN SAID OIL IS EXTRACTED AT A TEMPERATURE IN THE RANGE OF 100 TO 210* F. AND A PRESSURE ABOVE THE VAPOR PRESSURE OF THE CONSTITUENTS WITH SAID SOLVENT AND SAID HYDROGEN FLUORIDE-RICH PHASE, REMOVING SAID HYDROGEN FLUORIDE-RICH PHASE FROM SAID EXTRACTION ZONE, REMOVING A SOLVENT-OIL PHASE FROM SAID EXTRACTION ZONE TO A REACTION ZONE WHEREIN IT IS REACTED WITH HYDROGEN FLUORIDE AT A TEMPERATURE IN THE RANGE OF 300 TO 400* F. AND FOR A REACTION TIME IN THE RANGE OF 10 MINUTES TO 5 HOURS, SEPARATING EFFLUENT FROM SAID REACTION ZONE INTO A SOLVENT-OIL PHASE AND A HYDROGEN FLUORIDE-RICH PHASE WHICH LATTER IS RECYCLED TO SAID EXTRACTION ZONE AS AFORESAID, AND SEPARATING SAID SOLVENT-OIL PHASE FROM SAID EXTRACTION ZONE INTO SOLVENT WHICH IS RECYCLED TO SAID EXTRACTION ZONE AND TREATED OIL WHICH IS RECOVERED AS A PRODUCT OF THE PROCESS.
Claim 2
Dependent Claim
182 words
A PROCESS FOR REFINING LUBRICATING OIL WHICH COMPRISES INTRODUCING A LUBRICATING OIL STOCK, A NORMAL PARAFFIN HYDROCARBON SOLVENT CONTAINING NOT MORE THAN 4 CARBON ATOMS PER MOLECULE AND A HYDROGEN FLUORIDE-RICH PHASE FROM A REACTION ZONE TO AN EXTRACTION ZONE WHEREIN SAID OIL IS EXTRACTED AT A TEMPERATURE IN THE RANGE OF 100 TO 210* F. AND A PRESSURE ABOVE THE VAPOR PRESSURE OF THE CONSTITUENTS WITH SAID SOLVENT AND SAID HYDROGEN FLUORIDE-RICH PHASE, REMOVING SAID HYDROGEN FLUORIDE-RICH PHASE FROM SAID EXTRACTION ZONE, REMOVING A SOLVENT-OIL PHASE FROM SAID EXTRACTION ZONE TO A REACTION ZONE WHEREIN IT IS REACTED WITH HYDROGEN FLUORIDE AT A TEMPERATURE IN THE RANGE OF 300 TO 400* F. AND FOR A REACTION TIME IN THE RANGE OF 10 MINUTES TO 5 HOURS, SEPARATING EFFLUENT FROM SAID REACTION ZONE INTO A SOLVENT-OIL PHASE AND A HYDROGEN FLUORIDE-RICH PHASE WHICH LATTER IS RECYCLED TO SAID EXTRACTION ZONE AS AFORESAID, AND SEPARATING SAID SOLVENT-OIL PHASE FROM SAID EXTRACTION ZONE INTO SOLVENT WHICH IS RECYCLED TO SAID EXTRACTION ZONE AND TREATED OIL WHICH IS RECOVERED AS A PRODUCT OF THE PROCESS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |