US2841618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aldehyde purification
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1956-11-09
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Granted: 1958-07-01
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Expires: 1976-11-09
Abstract
No abstract record available.
Inventors
- 👤 Aldridge Clyde Lee
- 👤 Rhea N Watts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:24
CPC Classifications
C; C07; C07C; C07C27/00; C07C27/20; C07C27/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A CARBONYLATION PROCESS WHEREIN ALDEHYDES ARE PRODUCED BY REACTING AN OLEFIN WITH CARBON MONOXIDE AND HYDROGEN IN THE PRESENCE OF A CARBONYLATION CATALYST AT ELEVATED TEMPERATURES AND PRESSURES AND WHEREIN THE ALDEHYDE PRODUCT IS FREED FROM CATALYST, THE IMPROVEMENT WHICH COMPRISES RECOVERING AN ALDEHYDE PRODUCT CONTAMINATED WITH ALCOHOLS NOT EASILY SEPARATED BY DISTILLATION, FRACTIONATING SAID ALDEHYDE PRODUCT UNDER MILD CONDITIONS NOT CONDUCTIVE TO ACETAL FORMATION TO REMOVE HIGHER AND LOWER BOILING CONTAMINANTS, RECOVERING FROM SAID FRACTIONATION STEP AN ALCOHOL-CONTAMINATED ALDEHYDE MIXTURE, SUBJECTING SAID MIXTURE TO THERMAL TREATMENT WHEREBY ACETALIZATION OCCURS AND FRACTIONATING SAID MIXTURE TO RECOVER AN ALDEHYDE PRODUCT OF AT LEAST 99% PURITY.
Claim 2
Dependent Claim
105 words
IN A CARBONYLATION PROCESS WHEREIN ALDEHYDES ARE PRODUCED BY REACTING AN OLEFIN WITH CARBON MONOXIDE AND HYDROGEN IN THE PRESENCE OF A CARBONYLATION CATALYST AT ELEVATED TEMPERATURES AND PRESSURES AND WHEREIN THE ALDEHYDE PRODUCT IS FREED FROM CATALYST, THE IMPROVEMENT WHICH COMPRISES RECOVERING AN ALDEHYDE PRODUCT CONTAMINATED WITH ALCOHOLS NOT EASILY SEPARATED BY DISTILLATION, FRACTIONATING SAID ALDEHYDE PRODUCT UNDER MILD CONDITIONS NOT CONDUCTIVE TO ACETAL FORMATION TO REMOVE HIGHER AND LOWER BOILING CONTAMINANTS, RECOVERING FROM SAID FRACTIONATION STEP AN ALCOHOL-CONTAMINATED ALDEHYDE MIXTURE, SUBJECTING SAID MIXTURE TO THERMAL TREATMENT WHEREBY ACETALIZATION OCCURS AND FRACTIONATING SAID MIXTURE TO RECOVER AN ALDEHYDE PRODUCT OF AT LEAST 99% PURITY.
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) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |