US3207692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separation of a solvent by distillation
Assignee: Shell USA Inc
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Filing: 1962-03-06
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Granted: 1965-09-21
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Expires: 1982-03-06
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Van Kleef
- 👤 Walter C G Kosters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:27
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D11/00; B01D11/04; B01D11/0488; B01D3/34; B01D3/40; B01D3/42; B01D3/4211; B01D3/4238; C; C10; C10G; C10G21/00; C10G21/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN AN EXTRACTIVE DISTILLATION PROCESS FOR THE SEPARATION OF A MIXTURE BY MEANS OF A SELECTIVE SOLVENT BOILING HIGHER THAN THE MIXTURE, WHEREIN AT LEAST ONE OF THE COMPONENTS 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 THE SOLVENT AND SOME OF THE MORE READILY SOLUBLE COMPONENTS ARE RECOVERED FROM THE EXTRACTIVE DISTILLATION ZONE AS A BOTTOMS PRODUCT, AND WHEREIN THE OVERHEAD PRODUCT WITHDRAWN FROM THE EXTRACTIVE DISTILLATION ZONE CONSISTS OF AT LEAST ONE OF THE LESS READILY SOLUBLE COMPONENTS, SOME SOLVENT, AND SOME OF THE MORE READILY SOLUBLE COMPONENTS OF THE FEED, AND WHEREIN A SIDE STREAM IS WITHDRAWN CONSISTING OF AT LEAST ONE COMPONENT WHICH IS MORE READILY SOLUBLE IN THE SOLVENT AND SOME SOLVENT, THE IMPROVEMENT COMPRISING (1) PROVIDING SAID EXTRACTIVE DISTILLATION ZONE WITH A VAPORPERVIOUS LIQUID-IMPERVIOUS ZONE WHICH IS SITUATED BELOW THE POINTS OF INTRODUCTION OF THE FEED AND THE SOLVENT, (2) WITHDRAWING THE LIQUID ACCUMULATED IN SAID ZONE AND,
Claim 2
Dependent Claim
171 words
IN AN EXTRACTIVE DISTILLATION PROCESS FOR THE SEPARATION OF A MIXTURE BY MEANS OF A SELECTIVE SOLVENT BOILING HIGHER THAN THE MIXTURE, WHEREIN AT LEAST ONE OF THE COMPONENTS 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 THE SOLVENT AND SOME OF THE MORE READILY SOLUBLE COMPONENTS ARE RECOVERED FROM THE EXTRACTIVE DISTILLATION ZONE AS A BOTTOMS PRODUCT, AND WHEREIN THE OVERHEAD PRODUCT WITHDRAWN FROM THE EXTRACTIVE DISTILLATION ZONE CONSISTS OF AT LEAST ONE OF THE LESS READILY SOLUBLE COMPONENTS, SOME SOLVENT, AND SOME OF THE MORE READILY SOLUBLE COMPONENTS OF THE FEED, AND WHEREIN A SIDE STREAM IS WITHDRAWN CONSISTING OF AT LEAST ONE COMPONENT WHICH IS MORE READILY SOLUBLE IN THE SOLVENT AND SOME SOLVENT, THE IMPROVEMENT COMPRISING (1) PROVIDING SAID EXTRACTIVE DISTILLATION ZONE WITH A VAPORPERVIOUS LIQUID-IMPERVIOUS ZONE WHICH IS SITUATED BELOW THE POINTS OF INTRODUCTION OF THE FEED AND THE SOLVENT, (2) WITHDRAWING THE LIQUID ACCUMULATED IN SAID ZONE AND,
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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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |