Patent US2922831A successfully refreshed from Google Patents.
US2922831A
Expired / Lapsed
US
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Ether-glycol regeneration process utilizing an inorganic compound during solvent distillation
Assignee: Universal Oil Products Co
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Filing: 1954-12-23
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Granted: 1960-01-26
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Expires: 1974-12-23
Abstract
No abstract record available.
Inventors
- 👤 Herman S Bloch
- 👤 Howard E Mammen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:41
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/34; C07C41/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A CONTINUOUS SOLVENT EXTRACTION PROCESS WHEREIN A SOLVENT COMPOSITION IS UTILIZED IN THE EXTRACTION ZONE COMPRISING AN ETHER-GLYCOL STABILIZED AGAINST DETERIORATION BY THE PRESENCE OF AN AMINO COMPOUND DISSOLVED THEREIN, DISSOLVED EXTRACT IS DISTILLED FROM THE RESULTING RICH SOLVENT STREAM AND THE RESULTING LEAN SOLVENT COMPOSITION IS RECYCLED TO THE EXTRACTION ZONE, THE IMPROVEMENT IN SAID PROCESS WHICH COMPRISES CONTINUOUSLY WITHDRAWING FROM THE LEAN SOLVENT RECYCLE A SLIP-STREAM OF SAID LEAN SOLVENT COMPOSITION, DISTILLING SAID SLIP-STREAM IN THE PRESENCE OF AN INORGANIC ALKALINE CO,POUND AND VAPORIZING AMINE AND ETHER-GLYCOL THEREFROM, CONDENSING THE RESULTING ETHER-GLYCOL AND AMINE VAPORS AND COMBINING THE RESULTANT CONDENSATE WITH SAID RECYCLE SOLVENT STREAM CHARGED INTO THE SAID EXTRACTION ZONE.
Claim 2
Dependent Claim
114 words
IN A CONTINUOUS SOLVENT EXTRACTION PROCESS WHEREIN A SOLVENT COMPOSITION IS UTILIZED IN THE EXTRACTION ZONE COMPRISING AN ETHER-GLYCOL STABILIZED AGAINST DETERIORATION BY THE PRESENCE OF AN AMINO COMPOUND DISSOLVED THEREIN, DISSOLVED EXTRACT IS DISTILLED FROM THE RESULTING RICH SOLVENT STREAM AND THE RESULTING LEAN SOLVENT COMPOSITION IS RECYCLED TO THE EXTRACTION ZONE, THE IMPROVEMENT IN SAID PROCESS WHICH COMPRISES CONTINUOUSLY WITHDRAWING FROM THE LEAN SOLVENT RECYCLE A SLIP-STREAM OF SAID LEAN SOLVENT COMPOSITION, DISTILLING SAID SLIP-STREAM IN THE PRESENCE OF AN INORGANIC ALKALINE CO,POUND AND VAPORIZING AMINE AND ETHER-GLYCOL THEREFROM, CONDENSING THE RESULTING ETHER-GLYCOL AND AMINE VAPORS AND COMBINING THE RESULTANT CONDENSATE WITH SAID RECYCLE SOLVENT STREAM CHARGED INTO THE 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) | 1963-01-25 | 1963-07-27 | 1964-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-25 | 1967-07-27 | 1968-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-25 | 1971-07-27 | 1972-01-26 | $7700.00 | Window Closed / Lapsed |