US2514966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining and concentrating crude unsaturated aldehydes by extractive distillation
Assignee: Shell Development Co
•
Filing: 1948-01-09
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Granted: 1950-07-11
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Expires: 1968-01-09
Abstract
No abstract record available.
Inventors
- 👤 Gino J Pierotti
- 👤 Arthur E Handlos
- 👤 Charles M Reider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:28
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/81; C07C45/82; C07C45/83
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
THE PROCESS FOR SEPARATING AN ALPHA-BETA UNSATURATED ALIPHATIC ALDEHYDE HAVING FROM THREE TO FOUR CARBON ATOMS TO THE MOLECULE FROM A CRUDE ALPHA-BETA UNSATURATED ALIPHATIC ALDEHYDE HAVING FROM THREE TO FOUR CARBON ATOMS TO THE MOLECULE OBTAINED BY THE OXIDATION OF THE CORRESPONDING OLEFIN, SAID CRUDE UNSATURATED ALDEHYDE COMPRISING SAID ALPHA-BETA UNSATURATED ALDEHYDE IN ADMIXTURE WITH SATURATED CARBONYLIC IMPURITIES HAVING THE SAME NUMBER OF CARBON ATOMS TO THE MOLECULE AS SAID UNSATURATED ALDEHYDE, WHICH COMPRISES EXTRACTIVELY DISTILLING SAID CRUDE UNSATURATED ALDEHYDE AT SUBATMOSPHERIC PRESSURE AND AT A TEMPERATURE BELOW 35*C. IN THE PRESENCE OF A SUFFICIENT AMOUNT OF WATER TO MAINTAIN SUBSTANTIALLY A SINGLE LIQUID PHASE IN THE EXTRACTIVE DISTILLATION ZONE.
Claim 2
Dependent Claim
111 words
THE PROCESS FOR SEPARATING AN ALPHA-BETA UNSATURATED ALIPHATIC ALDEHYDE HAVING FROM THREE TO FOUR CARBON ATOMS TO THE MOLECULE FROM A CRUDE ALPHA-BETA UNSATURATED ALIPHATIC ALDEHYDE HAVING FROM THREE TO FOUR CARBON ATOMS TO THE MOLECULE OBTAINED BY THE OXIDATION OF THE CORRESPONDING OLEFIN, SAID CRUDE UNSATURATED ALDEHYDE COMPRISING SAID ALPHA-BETA UNSATURATED ALDEHYDE IN ADMIXTURE WITH SATURATED CARBONYLIC IMPURITIES HAVING THE SAME NUMBER OF CARBON ATOMS TO THE MOLECULE AS SAID UNSATURATED ALDEHYDE, WHICH COMPRISES EXTRACTIVELY DISTILLING SAID CRUDE UNSATURATED ALDEHYDE AT SUBATMOSPHERIC PRESSURE AND AT A TEMPERATURE BELOW 35*C. IN THE PRESENCE OF A SUFFICIENT AMOUNT OF WATER TO MAINTAIN SUBSTANTIALLY A SINGLE LIQUID PHASE IN THE EXTRACTIVE DISTILLATION ZONE.
References Cited (Backward Citations)
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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) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |