US3003929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotropic distillation with by-passing of reflux or vapor
Assignee: Eastman Kodak Co
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Filing: 1959-09-30
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Granted: 1961-10-10
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Expires: 1979-09-30
Abstract
No abstract record available.
Inventors
- 👤 Albert G Bright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:55
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/34; B01D3/36; Y; Y10; Y10S; Y10S203/00; Y10S203/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
THE PROCESS OF SEPARATING A SOLVENT MIXTURE COMPRISED OF ETHYLENE DICHLORIDE, PROPYLENE DICHLORIDE, CYCLOHEXANE, ACETONE AND N-BUTANOL WHICH COMPRISES FEEDING A SOLVENT MIXTURE INTO AN INTERMEDIATE SECTION OF A DISTILLATION COLUMN HAVING AT LEAST 50 PLATES, ALSO FEEDING WATER INTO THE COLUMN AT AN INTERMEDIATE SECTION BELOW THE POINT OF INTRODUCTION OF THE SOLVENT MIXTURE, SUPPLYING HEAT TO THE LOWER PART OF THE COLUMN WHEREBY A FRACTION COMPRISED OF CYCLOHEXANE, ACETONE AND WATER IS DISTILLED OFF THE TOP OF THE COLUMN, CONDENSING THIS FRACTION AND RETURNING A PORTION OF THE CONDENSATE TO THE COLUMN AS REFLUX, WITHDRAWING A FRACTION FROM THE SIDE OF THE COLUMN, SAID FRACTION BEING COMPRISED ESSENTIALLY OF ETHYLENE DICHLORIDE AND PROPYLENE DICHLORIDE AND IN THE VICINITY OF THIS SIDE WITHDRAWAL BY-PASSING A PART OF THE COLUMN CONTENTS AROUND THE PLATE SECTION WHERE THE SIDE FRACTION IS WITHDRAWN WHEREBY THE AMOUNT OF BUTANOL CONTAMINATION IN THE SIDE FRACTION IS REDUCED.
Claim 2
Dependent Claim
153 words
THE PROCESS OF SEPARATING A SOLVENT MIXTURE COMPRISED OF ETHYLENE DICHLORIDE, PROPYLENE DICHLORIDE, CYCLOHEXANE, ACETONE AND N-BUTANOL WHICH COMPRISES FEEDING A SOLVENT MIXTURE INTO AN INTERMEDIATE SECTION OF A DISTILLATION COLUMN HAVING AT LEAST 50 PLATES, ALSO FEEDING WATER INTO THE COLUMN AT AN INTERMEDIATE SECTION BELOW THE POINT OF INTRODUCTION OF THE SOLVENT MIXTURE, SUPPLYING HEAT TO THE LOWER PART OF THE COLUMN WHEREBY A FRACTION COMPRISED OF CYCLOHEXANE, ACETONE AND WATER IS DISTILLED OFF THE TOP OF THE COLUMN, CONDENSING THIS FRACTION AND RETURNING A PORTION OF THE CONDENSATE TO THE COLUMN AS REFLUX, WITHDRAWING A FRACTION FROM THE SIDE OF THE COLUMN, SAID FRACTION BEING COMPRISED ESSENTIALLY OF ETHYLENE DICHLORIDE AND PROPYLENE DICHLORIDE AND IN THE VICINITY OF THIS SIDE WITHDRAWAL BY-PASSING A PART OF THE COLUMN CONTENTS AROUND THE PLATE SECTION WHERE THE SIDE FRACTION IS WITHDRAWN WHEREBY THE AMOUNT OF BUTANOL CONTAMINATION IN THE SIDE FRACTION IS REDUCED.
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) | 1964-10-09 | 1965-04-10 | 1965-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-09 | 1969-04-10 | 1969-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-09 | 1973-04-10 | 1973-10-10 | $7700.00 | Window Closed / Lapsed |