US4334094A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing aliphatic carboxylic acids
Assignee: Huntsman Corp
•
Filing: 1980-06-30
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Granted: 1982-06-08
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Expires: 2000-06-30
Abstract
Abstract This invention pertains to the production of higher homologues of aliphatic carboxylic acids by reaction of said acids with carbon monoxide and hydrogen in the presence of one or more palladium-containing catalysts in combination with a Group VB tertiary donor ligand and in the presence of an iodide or bromide promoter.
Inventors
- 👤 John F. Knifton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:36
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/353
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
105 words
A process of preparing higher homologues of aliphatic carboxylic acids containing 2-6 carbon atoms which comprises the steps of contacting said aliphatic carboxylic acid starting material with at least a catalytic amount of a palladium-containing compound in combination with a Group VB tertiary donor ligand and in the presence of an iodide or bromide promoter and heating the resultant reaction mixture at a temperature of from 100° to about 350° C. under superatmospheric pressures of 500 psi or greater with carbon monoxide and hydrogen until substantial formation of the desired acids containing at least 3 carbon atoms has been achieved, and recovering said desired acids.
Claim 2
Dependent Claim
105 words
A process of preparing higher homologues of aliphatic carboxylic acids containing 2-6 carbon atoms which comprises the steps of contacting said aliphatic carboxylic acid starting material with at least a catalytic amount of a palladium-containing compound in combination with a Group VB tertiary donor ligand and in the presence of an iodide or bromide promoter and heating the resultant reaction mixture at a temperature of from 100° to about 350° C. under superatmospheric pressures of 500 psi or greater with carbon monoxide and hydrogen until substantial formation of the desired acids containing at least 3 carbon atoms has been achieved, and recovering said desired acids.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the said reaction mixture is heated at a temperature of about 180° to about 250° C.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein the process is conducted at a pressure of about 1000 psi to about 7500 psi.
Claim 5
Dependent Claim
36 words
The process of claim 1 wherein the palladium-containing compound is selected from the group consisting of one or more oxides of palladium, palladium salts of a mineral acid and palladium salts of an organic carboxylic acid.
Claim 6
Dependent Claim
25 words
The process of claim 1 wherein the palladium-containing compound is selected from the group consisting of palladium(II) acetate, palladium(II) acetylacetonate, palladium(II) chloride and palladium oxide.
Claim 7
Dependent Claim
31 words
The process of claim 1 wherein the said Group VB tertiary donor ligand is selected from the group consisting of triphenylphosphine, trimethylphosphine, tri-n-butylphosphine, triphenylphosphite, triethylphosphite, triphenylarsine, trimethylamine, triethylamine, tripropylamine and tri-n-octylamine.
Claim 8
Dependent Claim
21 words
The process of claim 1 wherein said iodide or bromide promoter is an alkyl iodide or bromide containing 1-6 carbon atoms.
Claim 9
Dependent Claim
24 words
The process of claim 7 wherein said promoter is selected from the group consisting of methyl iodide, methyl bromide, ethyl iodide and ethyl bromide.
Claim 10
Dependent Claim
15 words
The process of claim 1 wherein said aliphatic carboxylic acid starting material is acetic acid.
Claim 11
Dependent Claim
12 words
The process of claim 1 wherein said palladium-containing compound is palladium(II) acetate.
Claim 12
Dependent Claim
12 words
The process of claim 1 wherein said palladium-containing compound is palladium acetylacetonate.
Claim 13
Dependent Claim
12 words
The process of claim 1 wherein said palladium-containing compound is palladium oxide.
Claim 14
Dependent Claim
13 words
The process of claim 1 wherein the said palladium-containing compound is palladium(II) chloride.
Claim 15
Dependent Claim
39 words
The process of claim 1 wherein the said aliphatic carboxylic acid starting material is acetic acid, the said palladium-containing compound is palladium(II) acetate, the said Group VB tertiary donor ligand is triphenylphosphine and the said promoter is methyl iodide.
Claim 16
Dependent Claim
39 words
The process of claim 1 wherein the said aliphatic carboxylic acid starting material is acetic acid, the said palladium-containing compound is palladium(II) chloride, the said Group VB tertiary donor ligand is triphenylphosphine and the said promoter is methyl iodide.
References Cited (Backward Citations)
US4189441A
Cited
US4260820A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |