US2806071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction of aromatics from hydrocarbons
Assignee: Phillips Petroleum Co
•
Filing: 1953-01-21
•
Granted: 1957-09-10
•
Expires: 1973-01-21
Abstract
No abstract record available.
Inventors
- 👤 Robert A Findlay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:41
CPC Classifications
C; C10; C10G; C10G21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN THE SELECTIVE SOLVENT EXTRACTION OF AN AROMATIC HYDROCARBON CONTAINED IN A NAPHTHA THE STEPS WHICH COMPRISE FEEDING SAID HYDROCARBON FRACTION TO A SELECTIVE SOLVENT EXTRACTION ZONE, IN SAID ZONE CONTACTING SAID HYDROCARBON FRACTION WITH A SOLVENT WHICH WILL EXTRACT SELECTIVELY SAID AROMATIC HYDROCARBON FROM SAID HYDROCARBON FRACTION FORMING A RAFFINATE PHASE AND AN EXTRACT PHASE, REFLUXING THE EXTRACT PHASE CONTAINING SECTION OF SAID ZONE WITH A SYNTHETIC HYDROCARBON REFLUX HAVING A BOILING TEMPERATURE ABOVE THE BOILING TEMPERATURE OF THE AROMATIC TO BE EXTRACTED AND BELOW THE BOILING TEMPERATURE OF SAID SOLVENT, REMOVING EXTRACT PHASE FROM SAID ZONE, FLASHING AROMATIC HYDROCARBON FROM SAID EXTRACT PHASE, RECOVERING SAID AROMATIC HYDROCARBON AS A PRODUCT OF THE PROCESS, AND RETURNING THE FLASHED EXTRACT PHASE WHICH COMPRISES THE SOLOVENT AND SAID HYDROCARBON REFLUX TO SAID EXTRACTION ZONE.
Claim 2
Dependent Claim
133 words
IN THE SELECTIVE SOLVENT EXTRACTION OF AN AROMATIC HYDROCARBON CONTAINED IN A NAPHTHA THE STEPS WHICH COMPRISE FEEDING SAID HYDROCARBON FRACTION TO A SELECTIVE SOLVENT EXTRACTION ZONE, IN SAID ZONE CONTACTING SAID HYDROCARBON FRACTION WITH A SOLVENT WHICH WILL EXTRACT SELECTIVELY SAID AROMATIC HYDROCARBON FROM SAID HYDROCARBON FRACTION FORMING A RAFFINATE PHASE AND AN EXTRACT PHASE, REFLUXING THE EXTRACT PHASE CONTAINING SECTION OF SAID ZONE WITH A SYNTHETIC HYDROCARBON REFLUX HAVING A BOILING TEMPERATURE ABOVE THE BOILING TEMPERATURE OF THE AROMATIC TO BE EXTRACTED AND BELOW THE BOILING TEMPERATURE OF SAID SOLVENT, REMOVING EXTRACT PHASE FROM SAID ZONE, FLASHING AROMATIC HYDROCARBON FROM SAID EXTRACT PHASE, RECOVERING SAID AROMATIC HYDROCARBON AS A PRODUCT OF THE PROCESS, AND RETURNING THE FLASHED EXTRACT PHASE WHICH COMPRISES THE SOLOVENT AND SAID HYDROCARBON REFLUX TO SAID EXTRACTION ZONE.
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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) | 1960-09-09 | 1961-03-11 | 1961-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-09 | 1965-03-11 | 1965-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-09 | 1969-03-11 | 1969-09-10 | $7700.00 | Window Closed / Lapsed |