US2792332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Desulfurization and dearomatization of hydrocarbon mixtures by solvent extraction
Assignee: Pure Oil Co
•
Filing: 1953-12-04
•
Granted: 1957-05-14
•
Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Le Rol E Hutchings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:43
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A PROCESS FOR THE REMOVAL OF AROMATICS AND SULFUR COMPOUNDS FROM HYDROCARBON MIXTURES COMPRISING CONTACTING SAID HYDROCARBONS WITH A SOLVENT COMPRISING A MIXTURE OF POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 600 AND ISOPROPYL ALCOHOL IN VOLUME PERCENT RATIOS OF ABOUT 70 TO 30, RESPECTIVELY TO PRODUCE AN EXTRACT PHASE AND A RAFFINATE PHASE, AND SEPARATING AN AROMATIC RICH FRACTION FROM THE EXTRACT PHASE AND A PARAFFINIC-NAPHTHENIC RICH FRACCTION FROM THE RAFFINATE
Claim 2
Dependent Claim
73 words
A PROCESS FOR THE REMOVAL OF AROMATICS AND SULFUR COMPOUNDS FROM HYDROCARBON MIXTURES COMPRISING CONTACTING SAID HYDROCARBONS WITH A SOLVENT COMPRISING A MIXTURE OF POLYETHYLENE GLYCOL HAVING A MOLECULAR WEIGHT OF ABOUT 600 AND ISOPROPYL ALCOHOL IN VOLUME PERCENT RATIOS OF ABOUT 70 TO 30, RESPECTIVELY TO PRODUCE AN EXTRACT PHASE AND A RAFFINATE PHASE, AND SEPARATING AN AROMATIC RICH FRACTION FROM THE EXTRACT PHASE AND A PARAFFINIC-NAPHTHENIC RICH FRACCTION FROM THE RAFFINATE
References Cited (Backward Citations)
US2101643A
Cited
US2396303A
Cited
US2444582A
Cited
US2497588A
Cited
US2475147A
Cited
US2650187A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |