US2610209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent extraction of naphthenic acids
Assignee: Sunoco Inc
•
Filing: 1950-02-24
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Granted: 1952-09-09
•
Expires: 1970-02-24
Abstract
No abstract record available.
Inventors
- 👤 Earl M Honeycutt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:32
CPC Classifications
C; C10; C10G; C10G19/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN THE PURIFICATION OF NAPTHENIC ACIDS BY SOLVENT EXTRACTION IN A COUNTERCURRENT EXTRACTION ZONE COMPRISING AN EXTRACT-ENRICHING SECTION AT ONE END AND A RAFFINATE-ENRICHING SECTION AT THE OTHER, THE METHOD WHICH COMPRISES FEEDING CRUDE NAPHTHENIC ACIDS, CONTAINING HYDROCARBON OIL, IN HEATED CONDITION TO SAID ZONE INTERMEDIATE SAID SECTIONS, FEEDING INTO THE RAFFINATE-ENRICHING END A HEATED SOLVENT SELECTIVE FOR NAPHTHENIC ACIDS BUT HAVING INCOMPLETE MISCIBILITY THEREWITH AND COMPOSED MAINLY OF A WATER-MISCIBLE POLAR ORGANIC LIQUID, FLOWING THE SOLVENT THROUGH SAID RAFFINATE-ENRICHING SECTION COUNTERCURRENT TO THE FEED AND THENCE THROUGH SAID EXTRACT-ENRICHING SECTION, WITHDRAWING FROM THE RAFFINATE-ENRICHING SECTION END A RAFFINATE PHASE RICH IN HYDROCARBON OIL, COOLING THE SOLVENT PHASE FLOWING IN SAID ECTRACT-ENRICHING, SECTION TO PRECIPITATE A PORTION OF THE CONTAINED EXTRACT, SAID PRECIPITATED EXTRACT FLOWING COUNTERCURRENT TO THE SOLVENT AS REFLUX FOR THE EXTRACTS-ENRICHING OPERATION. AND WITHDRAWING SOLVENT PHASE FROM THE EXTRACTENRICHING SECTION END OF SAID ZONE.
Claim 2
Dependent Claim
147 words
IN THE PURIFICATION OF NAPTHENIC ACIDS BY SOLVENT EXTRACTION IN A COUNTERCURRENT EXTRACTION ZONE COMPRISING AN EXTRACT-ENRICHING SECTION AT ONE END AND A RAFFINATE-ENRICHING SECTION AT THE OTHER, THE METHOD WHICH COMPRISES FEEDING CRUDE NAPHTHENIC ACIDS, CONTAINING HYDROCARBON OIL, IN HEATED CONDITION TO SAID ZONE INTERMEDIATE SAID SECTIONS, FEEDING INTO THE RAFFINATE-ENRICHING END A HEATED SOLVENT SELECTIVE FOR NAPHTHENIC ACIDS BUT HAVING INCOMPLETE MISCIBILITY THEREWITH AND COMPOSED MAINLY OF A WATER-MISCIBLE POLAR ORGANIC LIQUID, FLOWING THE SOLVENT THROUGH SAID RAFFINATE-ENRICHING SECTION COUNTERCURRENT TO THE FEED AND THENCE THROUGH SAID EXTRACT-ENRICHING SECTION, WITHDRAWING FROM THE RAFFINATE-ENRICHING SECTION END A RAFFINATE PHASE RICH IN HYDROCARBON OIL, COOLING THE SOLVENT PHASE FLOWING IN SAID ECTRACT-ENRICHING, SECTION TO PRECIPITATE A PORTION OF THE CONTAINED EXTRACT, SAID PRECIPITATED EXTRACT FLOWING COUNTERCURRENT TO THE SOLVENT AS REFLUX FOR THE EXTRACTS-ENRICHING OPERATION. AND WITHDRAWING SOLVENT PHASE FROM THE EXTRACTENRICHING SECTION END OF SAID ZONE.
References Cited (Backward Citations)
US2165438A
Cited
US2391729A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |