US3210269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry solvent extraction of hydrocarbons
Assignee: Shell USA Inc
•
Filing: 1962-03-12
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Granted: 1965-10-05
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Expires: 1982-03-12
Abstract
No abstract record available.
Inventors
- 👤 Walter C G Kosters
- 👤 Voetter Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:39
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/28; B; B01; B01D; B01D3/00; B01D3/34; B01D3/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
IN AN EXTRACTION-STRIPPING PROCESS FOR THE SEPARATION OF A LIQUID HYDROCARBON MIXTURE HAVING A LOWER CUTTING POINT OF ABOUT 65*C. BY MEANS OF A SELECTIVE SOLVENT BOILING HIGHER THAN THE MIXTURE, WHEREIN AT LEAST ONE COMPONENT OF THE MIXTURE IS MORE READILY SOLUBLE IN THE SOLVENT AND AT LEAST ONE OTHER COMPONENT IS LESS READILY SOLUBLE IN THE SOLVENT AND WHEREIN AN EXTRACT PHASE CONTAINING THE SOLVENT IS RECOVERED FROM AN EXTRACTION ZONE AND IS PASSED INTO A STRIPPING ZONE, THE IMPROVEMENT COMPRISING: (1) USING A DRY SELECTIVE SOLVENT IN THE EXTRACTION ZONE, (2) DISTILLING THE FAT SELECTIVE SOLVENT WITHDRAWN AS THE EXTRACT PHASE FROM THE EXTRACTION ZONE, SAID DISTILLED SOLVENT CONTAINING THE MORE READILY SOLUBLE COMPONENTS OF THE FEED, (3) INTRODUCING THE DISTILLED SOLVENT IN TO A STRIPPING ZONE AND USING AS THE STRIPPING MEDIUM IN SAID STRIPPING ZONE A MATERIAL CONSISTING SUBSTANTIALLY OF ONE OF THE COMPONENTS OF THE FEED WHICH HAS BEEN SEPARATED THEREFROM BY EXTRACTION WITH SAID SELECTIVE SOLVENT, AND (4) RECYCLING THE MIXTURE OF THE STRIPPING MEDIUM AND THE MATERIAL STRIPPED FROM THE SOLVENT TO THE EXTRACTION ZONE.
Claim 2
Dependent Claim
183 words
IN AN EXTRACTION-STRIPPING PROCESS FOR THE SEPARATION OF A LIQUID HYDROCARBON MIXTURE HAVING A LOWER CUTTING POINT OF ABOUT 65*C. BY MEANS OF A SELECTIVE SOLVENT BOILING HIGHER THAN THE MIXTURE, WHEREIN AT LEAST ONE COMPONENT OF THE MIXTURE IS MORE READILY SOLUBLE IN THE SOLVENT AND AT LEAST ONE OTHER COMPONENT IS LESS READILY SOLUBLE IN THE SOLVENT AND WHEREIN AN EXTRACT PHASE CONTAINING THE SOLVENT IS RECOVERED FROM AN EXTRACTION ZONE AND IS PASSED INTO A STRIPPING ZONE, THE IMPROVEMENT COMPRISING: (1) USING A DRY SELECTIVE SOLVENT IN THE EXTRACTION ZONE, (2) DISTILLING THE FAT SELECTIVE SOLVENT WITHDRAWN AS THE EXTRACT PHASE FROM THE EXTRACTION ZONE, SAID DISTILLED SOLVENT CONTAINING THE MORE READILY SOLUBLE COMPONENTS OF THE FEED, (3) INTRODUCING THE DISTILLED SOLVENT IN TO A STRIPPING ZONE AND USING AS THE STRIPPING MEDIUM IN SAID STRIPPING ZONE A MATERIAL CONSISTING SUBSTANTIALLY OF ONE OF THE COMPONENTS OF THE FEED WHICH HAS BEEN SEPARATED THEREFROM BY EXTRACTION WITH SAID SELECTIVE SOLVENT, AND (4) RECYCLING THE MIXTURE OF THE STRIPPING MEDIUM AND THE MATERIAL STRIPPED FROM THE SOLVENT TO THE EXTRACTION ZONE.
References Cited (Backward Citations)
US2656301A
Cited
US3065167A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |