Patent US3933920A successfully refreshed from Google Patents.
US3933920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of α, ω-dialdehydes
Assignee: BASF SE
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Filing: 1974-03-12
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Granted: 1976-01-20
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Expires: 1994-03-12
Abstract
Abstract An improved process for the production of α,ω-dialdehydes by reaction of linear α,ω-diolefins having isolated double bonds with carbon monoxide and hydrogen at elevated temperature and at superatmospheric pressure in the presence of a cobalt carbonyl complex in which the improvement consists in supplying the cobalt to the reaction as cobalt carbonyl hydride dissolved in the α,ω-diolefin to be used or in an inert organic solvent and carrying out the reaction at a temperature of from 70° to 130°C.
Inventors
- 👤 Hans Juergen Nienburg
- 👤 Rudolf Kummer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/49; C07C45/50
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
An improved process for the production of an α,ω-dialdehyde by reaction of a linear α,ω-diolefin having isolated double bonds with carbon monoxide and hydrogen at elevated temperature and at superatmospheric pressure in the presence of a cobalt carbonyl complex, wherein the improvement comprises supplying the cobalt to the reaction in the form of cobalt carbonyl hydride which is dissolved in the α,ω-diolefin to be used or in an inert organic solvent and carrying out the reaction at a temperature of from 70° to 130°C.
Claim 2
Dependent Claim
84 words
An improved process for the production of an α,ω-dialdehyde by reaction of a linear α,ω-diolefin having isolated double bonds with carbon monoxide and hydrogen at elevated temperature and at superatmospheric pressure in the presence of a cobalt carbonyl complex, wherein the improvement comprises supplying the cobalt to the reaction in the form of cobalt carbonyl hydride which is dissolved in the α,ω-diolefin to be used or in an inert organic solvent and carrying out the reaction at a temperature of from 70° to 130°C.
Claim 3
Dependent Claim
17 words
A process as claimed in claim 1 wherein a temperature of from 100° to 120°C is maintained.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1 wherein a pressure of from 100 to 400 atmospheres is maintained.
Claim 5
Dependent Claim
17 words
A process as claimed in claim 1 wherein the α,ω-diolefin used has five to twenty carbon atoms.
Claim 6
Dependent Claim
42 words
A process as claimed in claim 1 wherein the amount of cobalt used is from 0.1 to 1% by weight of cobalt, calculated as metal and based on the reaction mixture, the cobalt being used in the form of cobalt carbonyl hydride.
Claim 7
Dependent Claim
21 words
A process as claimed in claim 1 wherein said diolefin is a linear α,ω-diolefin hydrocarbon having 5 to 20 carbon atoms.
Claim 8
Dependent Claim
29 words
A process as claimed in claim 1 wherein said diolefin is a linear α,ω-diolefin hydrocarbon having 5 to 20 carbon atoms and the pressure is 100 to 400 atmospheres.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |