US2519930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovering sulfonates of oilsoluble sulfonic acids from acid-treated hydrocarbon oils
Assignee: Gulf Research and Development Co
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Filing: 1948-09-08
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Granted: 1950-08-22
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Expires: 1968-09-08
Abstract
No abstract record available.
Inventors
- 👤 Riethof George
- 👤 Charles W Montgomery
- 👤 Jr George P Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:16
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/42; C07C303/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN THE METHOD WHEREIN A HYDROCARBON OIL IS SULFONATED WITH A SULFONATING AGENT, THE ACID OIL LAYER IS SEPARATED FROM THE SULFONATING AGENT LAYER, AND THE ACID OIL LAYER IS NEUTRALIZED WITH A BASE, THE IMPROVEMENT WHICH COMPRISES NEUTRALIZING THE ACID OIL LAYER WITH AN ALKYLOLAMINE INCOMPLETELY MISCIBLE WITH THE NEUTRALIZED OIL AND HAVING A DENSITY GREATER THAN THE DENSITY OF THE NEUTRALIZED OIL, AND EMPLOYING A SUFFICIENT EXCESS OF ALKYLOLAMINE TO DISSOLVE THE RESULTING ALKYLOLAMINE SULFONIC ACID SALTS AND FORM A LIQUID ALKYLOLAMINE LAYER, AND SEPARATING THE LAYERS CONTAINING IN SOLUTION SUBSTANTIALLY ALL OF THE ALKYLOLAMINE SULFONIC ACID SALTS FORMED IN THE NEUTRALIZATION.
Claim 2
Dependent Claim
104 words
IN THE METHOD WHEREIN A HYDROCARBON OIL IS SULFONATED WITH A SULFONATING AGENT, THE ACID OIL LAYER IS SEPARATED FROM THE SULFONATING AGENT LAYER, AND THE ACID OIL LAYER IS NEUTRALIZED WITH A BASE, THE IMPROVEMENT WHICH COMPRISES NEUTRALIZING THE ACID OIL LAYER WITH AN ALKYLOLAMINE INCOMPLETELY MISCIBLE WITH THE NEUTRALIZED OIL AND HAVING A DENSITY GREATER THAN THE DENSITY OF THE NEUTRALIZED OIL, AND EMPLOYING A SUFFICIENT EXCESS OF ALKYLOLAMINE TO DISSOLVE THE RESULTING ALKYLOLAMINE SULFONIC ACID SALTS AND FORM A LIQUID ALKYLOLAMINE LAYER, AND SEPARATING THE LAYERS CONTAINING IN SOLUTION SUBSTANTIALLY ALL OF THE ALKYLOLAMINE SULFONIC ACID SALTS FORMED IN THE NEUTRALIZATION.
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) | 1953-08-21 | 1954-02-20 | 1954-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-21 | 1958-02-20 | 1958-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-21 | 1962-02-20 | 1962-08-22 | $7700.00 | Window Closed / Lapsed |