US4222966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of aldehydes
Assignee: Hoechst AG
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Filing: 1978-08-17
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Granted: 1980-09-16
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Expires: 1998-08-17
Abstract
Abstract An improvement in the process for the continuous manufacture of an aldehyde by reaction of an olefin with carbon monoxide and hydrogen in the presence of a rhodium catalyst at an elevated temperature and pressure followed by distillative separation of the non-converted feedstocks and low boiling components of the reaction mixture, the improvement residing in employing a carbon monoxide/hydrogen mixture containing 2-20 ppm sulfur and recycling residual rhodium compounds, both dissolved and suspended in the distillation residue, to the reaction zone.
Inventors
- 👤 Ludger Bexten
- 👤 Boy Cornils
- 👤 Hans-Dieter Hahn
- 👤 Hans Tummes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:22
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/49; C07C45/50
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
93 words
In an oxo process for the continuous manufacture of an aldehyde by reaction of an olefin with carbon monoxide and hydrogen at a temperature of 50° to 200° C. under a pressure of 5 to 1,000 bars in the presence of a rhodium catalyst followed by distillative separation of the non-converted feedstocks and low boiling components of the reaction product, the improvement wherein a carbon monoxide/hydrogen mixture containing 2 to 20 parts per million sulfur is employed and residual rhodium catalyst, both dissolved in the distillation residue, are recycled to the reaction zone.
Claim 2
Dependent Claim
93 words
In an oxo process for the continuous manufacture of an aldehyde by reaction of an olefin with carbon monoxide and hydrogen at a temperature of 50° to 200° C. under a pressure of 5 to 1,000 bars in the presence of a rhodium catalyst followed by distillative separation of the non-converted feedstocks and low boiling components of the reaction product, the improvement wherein a carbon monoxide/hydrogen mixture containing 2 to 20 parts per million sulfur is employed and residual rhodium catalyst, both dissolved in the distillation residue, are recycled to the reaction zone.
Claim 3
Dependent Claim
19 words
A process according to claim 1 wherein the distillation residue is obtained at a distillation temperature below 135° C.
Claim 4
Dependent Claim
16 words
A process according to claims 1 or 2 wherein diisobutylene is employed as the olefin feedstock.
Claim 5
Dependent Claim
24 words
A process according to claim 1 wherein in addition to dissolved rhodium in the recycle there is a suspended rhodium compound in the recycle.
Claim 6
Dependent Claim
101 words
In an oxo process for the continuous manufacture and the continuous separation of an aldehyde from the resultant reaction mixture which process consists essentially of reacting at 50° to 200° C. at a pressure of 5 to 1,000 bars an olefin with carbon monoxide and hydrogen in the presence of a rhodium catalyst followed by distillative separation of the non-converted feedstocks and low boiling components of the reaction product, the improvement wherein a carbon monoxide/hydrogen mixture containing 2 to 20 parts per million sulfur is employed and residual rhodium catalyst, dissolved in the reaction residue, is recycled to the reaction zone.
Claim 7
Dependent Claim
101 words
In an oxo process for the continuous manufacture and the continuous separation of an aldehyde from the resultant reaction mixture which process consists essentially of reacting at 50° to 200° C. at a pressure of 5 to 1,000 bars an olefin with carbon monoxide and hydrogen in the presence of a rhodium catalyst followed by distillative separation of the non-converted feedstocks and low boiling components of the reaction product, the improvement wherein a carbon monoxide/hydrogen mixture containing 2 to 20 parts per million sulfur is employed and residual rhodium catalyst, dissolved in the reaction residue, is recycled to the reaction zone.
Claim 8
Dependent Claim
24 words
A process according to claim 5 wherein the reaction of the olefin with carbon monoxide and hydrogen is immediately followed by said distillative separation.
Claim 9
Dependent Claim
14 words
A process according to claim 5 wherein said distillative separation comprises a flash distillation.
Claim 10
Dependent Claim
46 words
A process according to claim 5 wherein both the sulfur and the rhodium compounds are dissolved in the distillation residue and the distillation residue additionally contains suspended rhodium and the dissolved and suspended rhodium compounds together with sulfur are recycled as catalyst to the reaction zone.
Claim 11
Dependent Claim
17 words
A process according to claim 1 wherein the olefin is a C 2 to C 18 olefin.
Claim 12
Dependent Claim
16 words
A process according to claim 5 wherein the olefin is a C 2 -C 18 olefin.
Claim 13
Dependent Claim
29 words
A process according to claim 9 wherein said olefin is selected from the group consisting of ethylene, propene, butene, isobutene, hexene-1, octene-1, diisobutene, decene-1, dodecene-1, tetradecene-1, hexadecene-1 and octadecene-1.
Claim 14
Dependent Claim
29 words
A process according to claim 10 wherein the olefin is selected from the group consisting of ethylene, propene, butene, isobutene, hexene-1, octene-1, diisobutene, decene-1, dodecene-1, tetradecene-1, hexadecene-1 and octadecene-1.
Claim 15
Dependent Claim
45 words
A process according to claim 1 wherein the olefin is a olefin mixture obtained by the catalytic dehydrogenation of a paraffin fraction or an olefin obtained by the dehydrochlorination of a chlorinated paraffin fraction or an olefin obtained by thermal cracking of a paraffin wax.
Claim 16
Dependent Claim
45 words
A process according to claim 5 wherein said olefin is a olefin mixture obtained by the catalytic dehydrogenation of a paraffin fraction or an olefin obtained by the dehydrochlorination of a chlorinated paraffin fraction or an olefin obtained by thermal cracking of a paraffin wax.
Claim 17
Dependent Claim
17 words
A process according to claim 9 wherein the sulfur is supplied in the form of hydrogen sulfide.
Claim 18
Dependent Claim
17 words
A process according to claim 9 wherein the sulfur is employed in the form of carbon oxysulfide.
Claim 19
Dependent Claim
17 words
A process according to claim 10 wherein the sulfur is supplied in the form of hydrogen sulfide.
Claim 20
Dependent Claim
17 words
A process according to claim 10 wherein the sulfur is supplied in the form of carbon oxysulfide.
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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |