US4433178A
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Process for preparing acetaldehyde from methanol and synthesis gas using a novel catalyst composition
Assignee: Texaco Inc
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Filing: 1982-02-01
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Granted: 1984-02-21
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Expires: 2002-02-01
Abstract
Abstract Acetaldehyde is prepared in good yield from methanol and synthesis gas by contacting the mixture of methanol, carbon monoxide and hydrogen with an iodide or iodine-free catalyst composition comprising ruthenium powder, a cobalt-containing compound and an onium salt or base, and heating the resulting mixture to an elevated temperature and pressure for sufficient time to produce the acetaldehyde, and then recovering the same from the reaction mixture.
Inventors
- 👤 Jiang-Jen Lin
- 👤 John F. Knifton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:03
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/32; C07C45/00; C07C45/49
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
98 words
A process for preparing acetaldehyde from methanol and syngas which comprises contacting a mixture of methanol, carbon monoxide and hydrogen with a catalytic amount of an iodine-free catalyst composition comprising ruthenium powder, a cobalt-containing compound, selected from the group consisting of cobalt oxides, cobalt salts, cobalt carbonyls and derivatives of aforesaid, and a quaternary onium compound, selected from the group consisting of quaternary ammonium salts, quaternary ammonium bases, quaternary phosphonium salts and quaternary phosphonium bases, and heating the resulting mixture to a temperature above 150° C. and a pressure above 500 psi for sufficient time to produce acetaldehyde.
Claim 2
Dependent Claim
98 words
A process for preparing acetaldehyde from methanol and syngas which comprises contacting a mixture of methanol, carbon monoxide and hydrogen with a catalytic amount of an iodine-free catalyst composition comprising ruthenium powder, a cobalt-containing compound, selected from the group consisting of cobalt oxides, cobalt salts, cobalt carbonyls and derivatives of aforesaid, and a quaternary onium compound, selected from the group consisting of quaternary ammonium salts, quaternary ammonium bases, quaternary phosphonium salts and quaternary phosphonium bases, and heating the resulting mixture to a temperature above 150° C. and a pressure above 500 psi for sufficient time to produce acetaldehyde.
Claim 3
Dependent Claim
53 words
A process as in claim 1 wherein the cobalt-containing compound is a member of the group consisting of cobalt carbonyls and derivatives thereof obtained by reacting the carbonyls with a group V donor ligand, cobalt carbonyl hydrides, cobalt carbonyl chlorides and bromides, cobalt chlorides and bromides and cobalt salts or organic carboxylic acids.
Claim 4
Dependent Claim
28 words
A process as in claim 1 wherein the cobalt-containing compound is a cobalt compound having at least one cobalt atom linked to at least three separate carbon atoms.
Claim 5
Dependent Claim
30 words
A process as in claim 1 wherein the quaternary onium salt or base is a tetrahydrocarbylphosphonium salt having from 1 to 10 carbon atoms in each of the hydrocarbyl groups.
Claim 6
Dependent Claim
21 words
A process as in claim 4 wherein the salt is selected from the group consisting of tetrahydrocarbylphosphonium bromides, chlorides, and chromates.
Claim 7
Dependent Claim
38 words
A process as in claim 1 wherein the catalyst components are utilized in the following molar ratios: ruthenium powder 0.1 to 4 moles; cobalt-containing compound 0.1 to 8 moles; quaternary onium salt or base 0.4 to 60 moles.
Claim 8
Dependent Claim
23 words
A process as in claim 1 wherein the carbon monoxide and hydrogen are employed in a molar ratio varying from 5:1 to 1:5.
Claim 9
Dependent Claim
20 words
A process as in claim 1 wherein the reaction is conducted at a temperature between 150° C. and 350° C.
Claim 10
Dependent Claim
20 words
A process as in claim 1 wherein the reaction is conducted at a pressure between 1000 psi and 7500 psi.
Claim 11
Dependent Claim
16 words
A process as in claim 1 wherein the quaternary onium salt or base is tetra-n-butylphosphonium bromide.
Claim 12
Dependent Claim
92 words
A process for preparing acetaldehyde from methanol and syngas which comprises contacting a mixture of methanol, carbon monoxide and hydrogen with a catalytic amount of an iodine-free catalyst composition comprising ruthenium powder, a cobalt carbonyl and a quaternary phosphonium salt selected from the group consisting of quaternary tetrahydrocarbylphosphonium chloride and quaternary tetrahydrocarbylphosphonium bromide,, and heating the resulting mixture to a temperature between 150° C. and 350° C. and a pressure between 1000 psi and 7500 psi for sufficient time to produce the desired acetaldehyde and recovering the same from the reaction mixture.
Claim 13
Dependent Claim
92 words
A process for preparing acetaldehyde from methanol and syngas which comprises contacting a mixture of methanol, carbon monoxide and hydrogen with a catalytic amount of an iodine-free catalyst composition comprising ruthenium powder, a cobalt carbonyl and a quaternary phosphonium salt selected from the group consisting of quaternary tetrahydrocarbylphosphonium chloride and quaternary tetrahydrocarbylphosphonium bromide,, and heating the resulting mixture to a temperature between 150° C. and 350° C. and a pressure between 1000 psi and 7500 psi for sufficient time to produce the desired acetaldehyde and recovering the same from the reaction mixture.
Claim 14
Dependent Claim
15 words
A process as in claim 1 wherein a solvent is included in the reaction mixture.
Claim 15
Dependent Claim
13 words
A process as in claim 12 wherein the solvent is a heterocyclic ether.
Claim 16
Dependent Claim
14 words
A process as in claim 1 wherein dioxane is included in the reaction mixture.
Claim 17
Dependent Claim
13 words
A process as in claim 11 wherein the cobalt carbonyl is dicobalt octacarbonyl.
Claim 18
Dependent Claim
16 words
A process as in claim 11 wherein the quaternary tetrahydrocarbylphosphonium chloride or bromide is n-heptyltriphenylphosphonium bromide.
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) | 1987-02-20 | 1987-08-22 | 1988-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-20 | 1991-08-22 | 1992-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-20 | 1995-08-22 | 1996-02-21 | $7700.00 | Window Closed / Lapsed |