US4190729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbonylation process with stabilized catalyst
Assignee: Monsanto Co
•
Filing: 1977-09-19
•
Granted: 1980-02-26
•
Expires: 1997-09-19
Abstract
Abstract In the cobalt carbonyl-catalyzed carbonylation of methanol to ethanol, acetaldehyde and methyl acetate, a tertiary phosphine oxide is utilized as a stabilizer. Product is distilled from the reaction mixture and the cobalt-containing residue solution is recycled.
Inventors
- 👤 Denis Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:48
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/32; C07C45/00; C07C45/49
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
115 words
In the process for the carbonylation of methanol with carbon monoxide and hydrogen in liquid phase at temperatures in the range of 150° to 250° C. and pressures in the range of 1500 to 15,000 psi in the presence of a cobalt carbonyl catalyst, the improvement which comprises conducting the carbonylation in the presence of a tertiary phosphine oxide, so as to have the tertiary phosphine oxide present as a catalyst stabilizer for product recovery, the tertiary phosphine oxide being a pentavalent phosphorus compound with three hydrocarbyl substituents on the phosphorus bonded by carbon-to-phosphorus bonds and separating the carbonylation products from the carbonylation reaction mixture by distilling in the presence of said tertiary phosphine oxide.
Claim 2
Dependent Claim
115 words
In the process for the carbonylation of methanol with carbon monoxide and hydrogen in liquid phase at temperatures in the range of 150° to 250° C. and pressures in the range of 1500 to 15,000 psi in the presence of a cobalt carbonyl catalyst, the improvement which comprises conducting the carbonylation in the presence of a tertiary phosphine oxide, so as to have the tertiary phosphine oxide present as a catalyst stabilizer for product recovery, the tertiary phosphine oxide being a pentavalent phosphorus compound with three hydrocarbyl substituents on the phosphorus bonded by carbon-to-phosphorus bonds and separating the carbonylation products from the carbonylation reaction mixture by distilling in the presence of said tertiary phosphine oxide.
Claim 3
Dependent Claim
12 words
The process of claim 1 in which a triarylphosphine oxide is present.
Claim 4
Dependent Claim
12 words
The process of claim 1 in which a trialkylphosphine oxide is present.
Claim 5
Dependent Claim
11 words
The process of claim 1 in which triphenylphosphine oxide is present.
Claim 6
Dependent Claim
35 words
The process of claim 1 in which the cobalt catalyst is present in concentrations of 10 -6 to 10 -1 moles/liter and the tertiary phosphine oxide is present in 0.1:1 to 1000:1 ratio to cobalt.
Claim 7
Dependent Claim
18 words
The process of claim 5 in which the tertiary phosphine oxide is present in excess of the cobalt.
Claim 8
Dependent Claim
32 words
The process of claim 1 in which carbonylation at elevated temperature and pressure, is followed by cooling and venting and distillation of the products from the carbonylation reaction mixture at atmospheric pressure.
Claim 9
Dependent Claim
19 words
The process of claim 1 in which ethanol is the major product produced and separated from the reaction mixture.
Claim 10
Dependent Claim
29 words
The process of claim 1 in which the cobalt material in the distillation residue is recycled for further effective utilization in the cobaltcarbonyl catalyzed carbonylation in the said process.
Claim 11
Dependent Claim
13 words
The process of claim 9 in which ethanol is the major product recovered.
Claim 12
Dependent Claim
52 words
A process for separation of carbonylation products from a carbonylation reaction mixture containing cobalt compounds which is produced in the carbonylation of methanol with a cobalt carbonyl catalyst, which comprises distilling the products from said carbonylation reaction mixture containing a tertiary phosphine oxide in which three hydrocarbyl substituents are on the phosphorus.
Claim 13
Dependent Claim
52 words
A process for separation of carbonylation products from a carbonylation reaction mixture containing cobalt compounds which is produced in the carbonylation of methanol with a cobalt carbonyl catalyst, which comprises distilling the products from said carbonylation reaction mixture containing a tertiary phosphine oxide in which three hydrocarbyl substituents are on the phosphorus.
Claim 14
Dependent Claim
17 words
The process of claim 11 in which the reaction mixture contains a high boiling inert organic solvent.
Claim 15
Dependent Claim
16 words
The process of claim 11 in which the reaction mixture contains a high boiling aromatic solvent.
Claim 16
Dependent Claim
12 words
The process of claim 11 in which ethanol is separated by distillation.
Claim 17
Dependent Claim
14 words
The process of claim 14 in which the reaction mixture contains a trialkylphosphine oxide.
Claim 18
Dependent Claim
14 words
The process of claim 14 in which the reaction mixture contains a triarylphosphine oxide.
Claim 19
Dependent Claim
16 words
The process of claim 16 in which the reaction mixture contains a high boiling aromatic solvent.
References Cited (Backward Citations)
US2457204A
Cited
US3501518A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |