US2905716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of oxo aldehydes
Assignee: Ruhrchemie AG
•
Filing: 1957-07-10
•
Granted: 1959-09-22
•
Expires: 1977-07-10
Abstract
No abstract record available.
Inventors
- 👤 Buchner Karl
- 👤 Meis Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:38
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/49; C07C45/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
PROCESS FOR THE CONTINOUS PURIFICATION OF AN ALDEHYDE CONTAINING METAL AND ACETAL IMPURITIES AND OBTAINED FROM THE CATALYTIC ADDITION OF CARBON MONOXIDE AND HYDROGEN TO CARBON COMPOUNDS CONTAINING OLEFINIC DOUBLE BONDS WHICH COMPRISES PASSING SAID ALDEHYDE UPWARDLY THROUGH A BODY OF WATER IN A FREE, ELONGATED VERTICALLY EXTENDING ZONE AT A TEMPERATURE BETWEEN ABOUT 150-200* C. AND AN ELEVATED PRESSURE, REMOVING PURIFIED ALDEHYDE ACCUMULATING AS AN UPPER LAYER ON TOP OF SAID BODY OF WATER, AND WITHDRAWING A PORTION OF THE WATER FROM THE BOTTOM OF SAID ZONE WITH PRECIPITATED METAL HYDROXIDES.
Claim 2
Dependent Claim
92 words
PROCESS FOR THE CONTINOUS PURIFICATION OF AN ALDEHYDE CONTAINING METAL AND ACETAL IMPURITIES AND OBTAINED FROM THE CATALYTIC ADDITION OF CARBON MONOXIDE AND HYDROGEN TO CARBON COMPOUNDS CONTAINING OLEFINIC DOUBLE BONDS WHICH COMPRISES PASSING SAID ALDEHYDE UPWARDLY THROUGH A BODY OF WATER IN A FREE, ELONGATED VERTICALLY EXTENDING ZONE AT A TEMPERATURE BETWEEN ABOUT 150-200* C. AND AN ELEVATED PRESSURE, REMOVING PURIFIED ALDEHYDE ACCUMULATING AS AN UPPER LAYER ON TOP OF SAID BODY OF WATER, AND WITHDRAWING A PORTION OF THE WATER FROM THE BOTTOM OF SAID ZONE WITH PRECIPITATED METAL HYDROXIDES.
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) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |