US2575244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating ketones from close-boiling mixtures
Assignee: Standard Oil Development Co
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Filing: 1948-09-08
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Granted: 1951-11-13
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Expires: 1968-09-08
Abstract
No abstract record available.
Inventors
- 👤 Carl S Carlson
- 👤 Jr Paul V Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:40
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/80; C07C45/81; C07C45/82
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
THE METHOD OF SEPARATING A KETONE FROM A MIXTURE OF KETONE, ALDEHYDE, ALCOHOL, AND ESTER COMPONENTS DIFFICULT TO SEPARATE BY ORDINARY FRACTIONAL DISTILLATION AND WHICH BOIL IN THE BOILING RANGE OF AQUEOUS C1 TO C5 ALCOHOLS, WHICH COMPRISES INTRODUCING THE MIXTURE INTO A FRACTIONAL DISTILLATION ZONE, INTRODUCING SUFFICIENT AQUEOUS ALKALI SOLUTION INTO THE FRACTIONAL DISTILLATION ZONE AT A POINT SUBSTANTIALLY ABOVE THE FEED POINT OF THE MIXTURE TO MAINTAIN AN INTERMAL LIQUID REFLUX HAVING A WATER CONTENT OF 50 MOL PER CENT TO 75 MOL PER CENT BELOW THE POINT OF ADDITION OF THE AQUEOUS ALKALI AND TO MAINTAIN A PH OF 7.1 TO 12.5 IN THE FRACTIONAL DISTILLATION ZONE DURING THE DISTILLATION, DISTILLING FROM SAID FEED MIXTURE A VAPOROUS MIXTURE WHICH FLOWS COUNTERCURRENT TO THE AQUEOUS ALKALI REFLUX, AND WITHDRAWING OVERHEAD FROM SAID FRACTIONAL DISTILLATION ZONE A VAPOR PRODUCT OF KETONE SUBSTANTIALLY FREED OF THE ALDEHYDE, ALCOHOL AND ESTER COMPONENTS.
Claim 2
Independent Claim
151 words
THE METHOD OF SEPARATING A KETONE FROM A MIXTURE OF KETONE, ALDEHYDE, ALCOHOL, AND ESTER COMPONENTS DIFFICULT TO SEPARATE BY ORDINARY FRACTIONAL DISTILLATION AND WHICH BOIL IN THE BOILING RANGE OF AQUEOUS C1 TO C5 ALCOHOLS, WHICH COMPRISES INTRODUCING THE MIXTURE INTO A FRACTIONAL DISTILLATION ZONE, INTRODUCING SUFFICIENT AQUEOUS ALKALI SOLUTION INTO THE FRACTIONAL DISTILLATION ZONE AT A POINT SUBSTANTIALLY ABOVE THE FEED POINT OF THE MIXTURE TO MAINTAIN AN INTERMAL LIQUID REFLUX HAVING A WATER CONTENT OF 50 MOL PER CENT TO 75 MOL PER CENT BELOW THE POINT OF ADDITION OF THE AQUEOUS ALKALI AND TO MAINTAIN A PH OF 7.1 TO 12.5 IN THE FRACTIONAL DISTILLATION ZONE DURING THE DISTILLATION, DISTILLING FROM SAID FEED MIXTURE A VAPOROUS MIXTURE WHICH FLOWS COUNTERCURRENT TO THE AQUEOUS ALKALI REFLUX, AND WITHDRAWING OVERHEAD FROM SAID FRACTIONAL DISTILLATION ZONE A VAPOR PRODUCT OF KETONE SUBSTANTIALLY FREED OF THE ALDEHYDE, ALCOHOL AND ESTER COMPONENTS.
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) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |