US2723219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of sulfonation feed stock
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1952-12-18
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Granted: 1955-11-08
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Expires: 1972-12-18
Abstract
No abstract record available.
Inventors
- 👤 Stewart Joseph
- 👤 Jr Albert J Ward
- 👤 Carter E Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:24
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A PROCESS FOR OBTAINING AN IMPROVED SULFONATION FEED STOCK, WHICH COMPRISES THE STEPS OF EXTRACTING A PETROLEUM LUBRICATING OIL HAVING A SPECIFIC GRAVITY OF 0.90-0.94, AN ANILINE POINT OF 185*210* F., AND BOILING IN THE RENGE OF 825*-120* F. WITH AQUEOUS PHENOL OF ABOUT 90 TO 99 WEIGHT PER CENT CONCENTRATION AT A TEMPERATURE IN THE RANGE OF ABOUT 130*-210* F. SO AS TO EXTRACT ABOUT FROM 40 TO 50 VOLUME PER CENT OF THE LUBRICATING OIL, WHEREBY NOT MORE THAN 20 VOLUME PER CENT OF A FIRST EXTRACT PHASE, CONSISTS OF DISSOLVD OIL; DISCARDING SAID FIRST EXTRACT PHASE; DISTILLING OFF THE AQUEOUS PHENOL FROM THE RESULTING RAFFINATE; EXTRACTING THE THUS-TREATED RAFFINATE OIL WITH AQUEOUS PHENOL OF 90 TO 99 WEIGHT PER CENT CONCENTRATION AT A TEMPERATURE OF ABOUT 160*-120* F. SO AS TO EXTRACT ABOUT FROM 25 TO 45 VOLUME PER CENT OF THE RAFFINATE FEED OIL TO THE SECOND EXTRACTION, WHEREBY THE SECOND EXTRACT PHASE CONTAINS FROM 10 TO 15 VOLUME PER
Claim 2
Dependent Claim
164 words
A PROCESS FOR OBTAINING AN IMPROVED SULFONATION FEED STOCK, WHICH COMPRISES THE STEPS OF EXTRACTING A PETROLEUM LUBRICATING OIL HAVING A SPECIFIC GRAVITY OF 0.90-0.94, AN ANILINE POINT OF 185*210* F., AND BOILING IN THE RENGE OF 825*-120* F. WITH AQUEOUS PHENOL OF ABOUT 90 TO 99 WEIGHT PER CENT CONCENTRATION AT A TEMPERATURE IN THE RANGE OF ABOUT 130*-210* F. SO AS TO EXTRACT ABOUT FROM 40 TO 50 VOLUME PER CENT OF THE LUBRICATING OIL, WHEREBY NOT MORE THAN 20 VOLUME PER CENT OF A FIRST EXTRACT PHASE, CONSISTS OF DISSOLVD OIL; DISCARDING SAID FIRST EXTRACT PHASE; DISTILLING OFF THE AQUEOUS PHENOL FROM THE RESULTING RAFFINATE; EXTRACTING THE THUS-TREATED RAFFINATE OIL WITH AQUEOUS PHENOL OF 90 TO 99 WEIGHT PER CENT CONCENTRATION AT A TEMPERATURE OF ABOUT 160*-120* F. SO AS TO EXTRACT ABOUT FROM 25 TO 45 VOLUME PER CENT OF THE RAFFINATE FEED OIL TO THE SECOND EXTRACTION, WHEREBY THE SECOND EXTRACT PHASE CONTAINS FROM 10 TO 15 VOLUME PER
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) | 1958-11-07 | 1959-05-09 | 1959-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-07 | 1963-05-09 | 1963-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-07 | 1967-05-09 | 1967-11-08 | $7700.00 | Window Closed / Lapsed |