US2570044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propane fractionation of reduced crude oil with recycle of a solvent extract
Assignee: Phillips Petroleum Co
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Filing: 1948-12-23
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Granted: 1951-10-02
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Expires: 1968-12-23
Abstract
No abstract record available.
Inventors
- 👤 Bruce C Benedict
- 👤 William N Axe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:27
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
218 words
IN THE PROCESS FOR SEPARATING AND RECOVERING A LUBRICATING OIL FRACTION FROM A LOW ASPHALTCONTENT CRUDE LUBRICATING OIL STOCK WITH PROPANE WHEREIN A HARD DEPOSIT OF ASPHALT IS FORMED AND ADHERES TO AND PLUGS THE OIL FRACTIONATING APPARATUS, A METHOD FOR CONTINUOUSLY CARRYING OUT SAID FRACTIONATING OPERATION WITHOUT PLUGGING OF SAID APPARATUS BY DEPOSITED ASPHALT COMPRISING MAINTAINING A BODY OF LIQUID PROPANE IN A CONTACTING ZONE, INTRODUCING SAID OIL INTO SAID ZONE AT A MIDPOINT, INTRODUCING LIQUID PROPANE INTO SAID ZONE AT A POINT NEAR THE BOTTOM THEREOF, WITHDRAWING PROPANE CONTAINING DISSOLVED OIL FROM THE TOP AND WITHDRAWING AN OIL-RICH LIQUID PHASE FREE FROM PRECIPITATED ASPHALT FROM THE BOTTOM OF SAID ZONE; SEPARATING THE OIL FROM THEE PROPANE CONTAINING SAID DISSOLVED OIL; MAINTAINING A BODY OF PHENOL IN A SECOND CONTACTING ZONE, INTRODUCING THE SEPARATED OIL INTO SAID BODY OF PHENOL AT A POINT NEAR THE BOTTOM AND INTRODUCING PHENOL AT A POINT NEAR THE TOP THEREOF, REMOVING A RAFFINATE PHASE FROM THE TOP AND AN EXTRACT PHASE FROM THE BOTTOM OF SAID SECOND ZONE, SEPARATING A MIXTURE OF AROMATIC AND NAPHTHENIC OILS FROM SAID EXTRACT PHASE AND INTRODUCING THE SEPARATED MIXTURE OF AROMATIC AND NAPHTHENIC OILS FREE FROM PHENOL INTO SAID BODY OF PROPANE AT THE POINT OF INTRODUCTION OF SAID LOW ASPHALT-CONTENT CRUDE LUBRICATING OIL STOCK.
Claim 2
Dependent Claim
218 words
IN THE PROCESS FOR SEPARATING AND RECOVERING A LUBRICATING OIL FRACTION FROM A LOW ASPHALTCONTENT CRUDE LUBRICATING OIL STOCK WITH PROPANE WHEREIN A HARD DEPOSIT OF ASPHALT IS FORMED AND ADHERES TO AND PLUGS THE OIL FRACTIONATING APPARATUS, A METHOD FOR CONTINUOUSLY CARRYING OUT SAID FRACTIONATING OPERATION WITHOUT PLUGGING OF SAID APPARATUS BY DEPOSITED ASPHALT COMPRISING MAINTAINING A BODY OF LIQUID PROPANE IN A CONTACTING ZONE, INTRODUCING SAID OIL INTO SAID ZONE AT A MIDPOINT, INTRODUCING LIQUID PROPANE INTO SAID ZONE AT A POINT NEAR THE BOTTOM THEREOF, WITHDRAWING PROPANE CONTAINING DISSOLVED OIL FROM THE TOP AND WITHDRAWING AN OIL-RICH LIQUID PHASE FREE FROM PRECIPITATED ASPHALT FROM THE BOTTOM OF SAID ZONE; SEPARATING THE OIL FROM THEE PROPANE CONTAINING SAID DISSOLVED OIL; MAINTAINING A BODY OF PHENOL IN A SECOND CONTACTING ZONE, INTRODUCING THE SEPARATED OIL INTO SAID BODY OF PHENOL AT A POINT NEAR THE BOTTOM AND INTRODUCING PHENOL AT A POINT NEAR THE TOP THEREOF, REMOVING A RAFFINATE PHASE FROM THE TOP AND AN EXTRACT PHASE FROM THE BOTTOM OF SAID SECOND ZONE, SEPARATING A MIXTURE OF AROMATIC AND NAPHTHENIC OILS FROM SAID EXTRACT PHASE AND INTRODUCING THE SEPARATED MIXTURE OF AROMATIC AND NAPHTHENIC OILS FREE FROM PHENOL INTO SAID BODY OF PROPANE AT THE POINT OF INTRODUCTION OF SAID LOW ASPHALT-CONTENT CRUDE LUBRICATING OIL STOCK.
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) | 1954-10-01 | 1955-04-02 | 1955-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-01 | 1959-04-02 | 1959-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-01 | 1963-04-02 | 1963-10-02 | $7700.00 | Window Closed / Lapsed |