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US4299990A
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Process for preparing aldehydes
Assignee: Hoechst AG
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Filing: 1980-06-30
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Granted: 1981-11-10
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Expires: 2000-06-30
Abstract
Abstract A process is described for preparing aldehyde by hydroformylation of olefins, in which the olefins together with carbon monoxide, hydrogen and paraffins are introduced into a solution of rhodium carbonyl-triphenylphosphine complexes as catalyst and phosphines as solvent, the improvement wherein the gas stream entering the catalyst solution contains 5 to 30% by volume of paraffins with 1 to 5 carbon atoms.
Inventors
- 👤 Hans Tummes
- 👤 Boy Cornils
- 👤 Heinz Noeske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:33
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/49; C07C45/50
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
In a process for preparing an aldehyde by hydroformylation of an olefin in which a gaseous olefin together with gaseous carbon monoxide and gaseous hydrogen is introduced into a solution of a rhodium carbonyl-triphenylphospine complex as catalysts and a phosphine as solvent, an improvement wherein the gas stream entering the catalyst solution contains 5 to 30% by volume of at least 1 parraffin with 1 to 5 carbon atoms.
Claim 2
Dependent Claim
69 words
In a process for preparing an aldehyde by hydroformylation of an olefin in which a gaseous olefin together with gaseous carbon monoxide and gaseous hydrogen is introduced into a solution of a rhodium carbonyl-triphenylphospine complex as catalysts and a phosphine as solvent, an improvement wherein the gas stream entering the catalyst solution contains 5 to 30% by volume of at least 1 parraffin with 1 to 5 carbon atoms.
Claim 3
Dependent Claim
57 words
A process according to claim 1 wherein following hydroformylation the hydroformylation products formed and unreacted feedstock are immediately removed as a gas stream from the catalyst solution, liquid hydroformylation products are separated from the gas stream by cooling, and the remaining gaseous reaction product is recycled to the hydroformylation zone after being mixed with fresh feedstock olefin.
Claim 4
Dependent Claim
28 words
A process according to claim 1, wherein the hydroformylation is effected at a pressure of 1 to 50 atmospheres and at a temperature of 80° to 160° C.
Claim 5
Dependent Claim
37 words
A process according to claim 3, wherein the volume ratio of the components of carbon monoxide to hydrogen is 1:2 to 2:1 and 4 to 50 volumes of CO/H 2 mixture are employed per volume of olefin.
Claim 6
Dependent Claim
30 words
A process according to claim 3, wherein said paraffin hydrocarbons are present in an amount of 0.5 to 10 mols per mol of olefin which flows through the catalyst solution.
Claim 7
Dependent Claim
25 words
A process according to claim 5, wherein the olefin content of the total feedstock product entering the catalyst solution is less than 20% by volume.
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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |