US2758136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Decolorizing oxo aldehydes with acids
Assignee: Ruhrchemie AG
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Filing: 1950-07-18
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Granted: 1956-08-07
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Expires: 1970-07-18
Abstract
No abstract record available.
Inventors
- 👤 Buchner Karl
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
82 words
METHOD FOR THE DECOLORIZATION OF ALDEHYDES DERIVED FROM THE CATALYTIC ADDITION OF WATER GAS TO UNSATURATED HYDROCARBONS, WHICH COMPRISES CONTACTING SUCH AN ALDEHYDE WITH A NON-AQUEOUS SOLUTION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID, SUCCINIC ACID, AND CITRIC ACID IN AN ALIPHATIC ALCOHOL HAVING FROM 1-3 CARBON ATOMS AT A TEMPERATURE BELOW THE BOILING TEMPERATURE OF TEH ALDEHYDE FOR A PERIOD SUFFICIENT TO SUBSTANTIALLY OBTAIN MAXIMUM DECOLORIZATION OF THE ALDEHYDE, AND THEREAFTER RECOVERING A SUBSTANTIALLY COLORPURIFIED ALDEHYDE PRODUCT.
Claim 2
Dependent Claim
82 words
METHOD FOR THE DECOLORIZATION OF ALDEHYDES DERIVED FROM THE CATALYTIC ADDITION OF WATER GAS TO UNSATURATED HYDROCARBONS, WHICH COMPRISES CONTACTING SUCH AN ALDEHYDE WITH A NON-AQUEOUS SOLUTION OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF OXALIC ACID, SUCCINIC ACID, AND CITRIC ACID IN AN ALIPHATIC ALCOHOL HAVING FROM 1-3 CARBON ATOMS AT A TEMPERATURE BELOW THE BOILING TEMPERATURE OF TEH ALDEHYDE FOR A PERIOD SUFFICIENT TO SUBSTANTIALLY OBTAIN MAXIMUM DECOLORIZATION OF THE ALDEHYDE, AND THEREAFTER RECOVERING A SUBSTANTIALLY COLORPURIFIED ALDEHYDE PRODUCT.
References Cited (Backward Citations)
BE493493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |