Patent US2645596A successfully refreshed from Google Patents.
US2645596A
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Extraction of lubricating oils with a phenol-alkanolamine solvent
Assignee: Phillips Petroleum Co
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Filing: 1948-11-01
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Granted: 1953-07-14
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Expires: 1968-11-01
Abstract
No abstract record available.
Inventors
- 👤 Axe William Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:47
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR THE SOLVENT EXTRACTION OF A LIGHT LUBE OIL STOCK, COMPRISING COUNTERCURRENTLY CONTACTING SAID LUBE OIL STOCK WITH A DOWNWARDLY MOVING SOLVENT MATERIAL COMPRISING FROM 1 TO 20 WEIGHT PER CENT ETHANOLAMINE DISSOLVED IN PHENOL, MAINTAINING A TEMPERATURE IN THE TOP PORTION OF THE ZONE OF SAID CONTACTING WITHIN THE RANGE OF 200-250* F., MAINTAINING A TEMPERATUE IN THE BOTTOM PORTION OF SAID ZONE AT A LEVEL AT LEAST AS HIGH AS THE POUR POINT OF SAID OIL, WITHDRAWING RAFFINATE PHASE FROM THE TOP OF SAID ZONE, WITHDRAWING EXTRACT PHASE FROM THE BOTTOM OF SAID ZONE, RECOVERING SAID SOLVENT FROM EACH SAID PHASE, RECOVERING SOLVENT-FREE EXTRACT, AND RECOVERING SOLVENT-FREE RAFFINATE AS A PRODUCT OF THE PROCESS.
Claim 2
Dependent Claim
118 words
A PROCESS FOR THE SOLVENT EXTRACTION OF A LIGHT LUBE OIL STOCK, COMPRISING COUNTERCURRENTLY CONTACTING SAID LUBE OIL STOCK WITH A DOWNWARDLY MOVING SOLVENT MATERIAL COMPRISING FROM 1 TO 20 WEIGHT PER CENT ETHANOLAMINE DISSOLVED IN PHENOL, MAINTAINING A TEMPERATURE IN THE TOP PORTION OF THE ZONE OF SAID CONTACTING WITHIN THE RANGE OF 200-250* F., MAINTAINING A TEMPERATUE IN THE BOTTOM PORTION OF SAID ZONE AT A LEVEL AT LEAST AS HIGH AS THE POUR POINT OF SAID OIL, WITHDRAWING RAFFINATE PHASE FROM THE TOP OF SAID ZONE, WITHDRAWING EXTRACT PHASE FROM THE BOTTOM OF SAID ZONE, RECOVERING SAID SOLVENT FROM EACH SAID PHASE, RECOVERING SOLVENT-FREE EXTRACT, AND RECOVERING SOLVENT-FREE RAFFINATE AS A PRODUCT OF THE PROCESS.
References 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) | 1956-07-13 | 1957-01-12 | 1957-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-13 | 1961-01-12 | 1961-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-13 | 1965-01-12 | 1965-07-14 | $7700.00 | Window Closed / Lapsed |