US4273945A
Expired / Lapsed
US
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Preparation of saturated aliphatic, cycloaliphatic and araliphatic aldehydes
Assignee: BASF SE
•
Filing: 1979-07-05
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Granted: 1981-06-16
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Expires: 1999-07-05
Abstract
Abstract Saturated aliphatic, cycloaliphatic and araliphatic aldehydes are prepared by selective hydrogenation of the corresponding olefinically unsaturated aldehydes with hydrogen in the liquid phase over a palladium-containing catalyst, using a catalyst system in which the active constituents are from 2 to 90% by weight of palladium and from 10 to 98% by weight of an oxide or a salt of a rare earth metal or of a mixture of different oxides and/or salts of this type.
Inventors
- 👤 Gerd Heilen
- 👤 Axel Nissen
- 👤 Wolfgang Koernig
- 👤 Michael Horner
- 👤 Werner Fliege
- 👤 Guenter Boettger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:16
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/62
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
In a process for the preparation of saturated aliphatic, cycloaliphatic and araliphatic aldehydes by selective hydrogenation of the corresponding olefinically unsaturated aldehydes with hydrogen in the liquid phase over a palladium-containing catalyst at a pressure of from 1 to 100 bar and at a temperature of from 20° to 250° C., the improvement which comprises using a catalyst in which the active constituents consist essentially of (a) 2-90% by weight of palladium and (b) 10-98% by weight of an oxide or salt of a rare earth metal or a mixture consisting essentially of oxides and/or salts of rare earth metals, the weight ratio of Pd to rare earth metal being from 2:98 to 90:10.
Claim 2
Dependent Claim
114 words
In a process for the preparation of saturated aliphatic, cycloaliphatic and araliphatic aldehydes by selective hydrogenation of the corresponding olefinically unsaturated aldehydes with hydrogen in the liquid phase over a palladium-containing catalyst at a pressure of from 1 to 100 bar and at a temperature of from 20° to 250° C., the improvement which comprises using a catalyst in which the active constituents consist essentially of (a) 2-90% by weight of palladium and (b) 10-98% by weight of an oxide or salt of a rare earth metal or a mixture consisting essentially of oxides and/or salts of rare earth metals, the weight ratio of Pd to rare earth metal being from 2:98 to 90:10.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the rare earth metal is selected from the group consisting of cerium, praseodymium and neodymium.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein the weight ratio of palladium to rare earth metal is from 20:80 to 80:20.
References Cited (Backward Citations)
US3118954A
Cited
GB1065395A
Cited
GB1025047A
Cited
GB1065628A
Cited
GB1310143A
Cited
US4146581A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |