US4317918A
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Process for preparing alcohols
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1980-11-03
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Granted: 1982-03-02
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Expires: 2000-11-03
Abstract
Abstract An alcohol is produced in a high selectivity with a good yield from the corresponding carboxylic acid by reducing the latter with hydrogen in the presence of a rhenium catalyst in the coexistence of an organic base. An arylacetic acid, which is included in the starting carboxylic acid, can be produced in an excellent yield from the corresponding aryl aldehyde by reacting the latter with carbon monoxide and water in the presence of rhodium or its compound and hydrogen iodide.
Inventors
- 👤 Tetsuo Takano
- 👤 Gohu Suzukamo
- 👤 Masaru Ishino
- 👤 Kiyoshi Ikimi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:23
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C29/149; B; B01; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/36; C07C51/00; C07C51/10; C07C51/12; C07C2601/00; C07C2601/12; C07C2601/16; C07C2602/00; C07C2602/02; C07C2602/14; C07C2602/26; C07C2602/28
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
50 words
A process for preparing an alcohol from the corresponding carboxylic acid by reducing said carboxylic acid with hydrogen in the presence of a rhenium catalyst, characterized in that at least one organic base selected from the group consisting of organic amines and organic phosphines is present in the reaction system.
Claim 2
Dependent Claim
50 words
A process for preparing an alcohol from the corresponding carboxylic acid by reducing said carboxylic acid with hydrogen in the presence of a rhenium catalyst, characterized in that at least one organic base selected from the group consisting of organic amines and organic phosphines is present in the reaction system.
Claim 3
Dependent Claim
14 words
The process according to claim 1, wherein the rhenium catalyst is a rhenium oxide.
Claim 4
Dependent Claim
22 words
The process according to claim 1, wherein the organic base is selected from the group consisting of tertiary amines and tri-substituted phosphines.
Claim 5
Dependent Claim
27 words
The process according to claim 1, wherein the amount of the organic base is from 10 -4 to 10 moles to one mole of the rhenium catalyst.
Claim 6
Dependent Claim
31 words
The process according to claim 1, wherein the carboxylic acid has at least one carboxyl group and does not include any atom or group which prevents or interferes the relevant reduction.
Claim 7
Dependent Claim
29 words
The process according to claim 5, wherein the carboxylic acid is the one of the formula: R--COOH wherein R is a substituted or unsubstituted, aliphatic, aromatic or araliphatic group.
Claim 8
Dependent Claim
44 words
The process according to claim 6, wherein the carboxylic acid is the one of the formula: ##STR6## wherein Ar is a substituted or unsubstituted, monocyclic or condensed polycyclic, aromatic hydrocarbon group and X is hydrogen or alkyl having not more than 6 carbon atoms.
Claim 9
Dependent Claim
62 words
The process according to claim 7, wherein Ar is a phenyl group bearing optionally one to three substituents chosen from alkyl having not more than 6 carbon atoms, alkoxy having not more than 6 carbon atoms, aryl having not more than 20 carbon atoms, aralkyl having not more than 20 carbon atoms, aryloxy having not more than 20 carbon atoms and halogen.
Claim 10
Dependent Claim
10 words
The process according to claim 8, wherein X is hydrogen.
Claim 11
Dependent Claim
39 words
The process according to claim 9, wherein the carboxylic acid is the one prepared by reacting the corresponding aldehyde with carbon monoxide and water in the presence of a catalyst system comprising rhodium or its compound with hydrogen iodide.
Claim 12
Dependent Claim
88 words
A process for preparing a carboxylic acid of of the formula: Ar--CH 2 --COOH wherein Ar is a substituted or unsubstituted, monocyclic or condensed polycyclic, aromatic hydrocarbon group by reacting the corresponding aldehyde of the formula: Ar--CHO wherein Ar is as defined above with carbon monoxide and water in the presence of a catalyst system, characterized in that the catalyst system comprises rhodium or its compound with hydrogen iodide, the molar ratio (gram atom ratio) of hydrogen iodide to rhodium or its compound being from 1 to 10.
Claim 13
Dependent Claim
88 words
A process for preparing a carboxylic acid of of the formula: Ar--CH 2 --COOH wherein Ar is a substituted or unsubstituted, monocyclic or condensed polycyclic, aromatic hydrocarbon group by reacting the corresponding aldehyde of the formula: Ar--CHO wherein Ar is as defined above with carbon monoxide and water in the presence of a catalyst system, characterized in that the catalyst system comprises rhodium or its compound with hydrogen iodide, the molar ratio (gram atom ratio) of hydrogen iodide to rhodium or its compound being from 1 to 10.
Claim 14
Dependent Claim
62 words
The process according to claim 11, wherein Ar is a phenyl group bearing optionally one to three substituents chosen from alkyl having not more than 6 carbon atoms, alkoxy having not more than 6 carbon atoms, aryl having not more than 20 carbon atoms, aralkyl having not more than 20 carbon atoms, aryloxy having not more than 20 carbon atoms and halogen.
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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |