US4104478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic hydrogenation of fatty acids
Assignee: Ashland LLC
•
Filing: 1977-11-23
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Granted: 1978-08-01
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Expires: 1997-11-23
Abstract
Abstract A fatty acid is converted to the corresponding carbon length alcohol by the liquid phase hydrogenation of the carboxylic acid in the presence of a co-catalyst system consisting essentially of activated rhenium metal in combination with an extrinsic metal catalyst in the form of one of the platinum metals.
Inventors
- 👤 Bhupendra C. Trivedi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:52
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C29/149
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 words
A process for the catalytic reduction of a C 4 -C 24 fatty acid to the corresponding carbon length alcohol which comprises hydrogenating the fatty acid at a temperature of from about 170°-250° C. and at a pressure of from about 20-140 atmospheres in the presence of a catalytically effective amount of a co-catalyst system consisting essentially of 1 part by weight of activated rhenium and from 0.25-1.5 parts of an extrinsic metal catalyst selected from the group consisting of ruthenium, rhodium, platinum and palladium.
Claim 2
Dependent Claim
85 words
A process for the catalytic reduction of a C 4 -C 24 fatty acid to the corresponding carbon length alcohol which comprises hydrogenating the fatty acid at a temperature of from about 170°-250° C. and at a pressure of from about 20-140 atmospheres in the presence of a catalytically effective amount of a co-catalyst system consisting essentially of 1 part by weight of activated rhenium and from 0.25-1.5 parts of an extrinsic metal catalyst selected from the group consisting of ruthenium, rhodium, platinum and palladium.
Claim 3
Dependent Claim
21 words
A process in accordance with claim 1 wherein said temperature is from 200°-230° C. and said pressure is from 20-70 atmospheres.
Claim 4
Dependent Claim
29 words
A process in accordance with claim 2 wherein the co-catalyst system consists essentially of 1 part by weight of rhenium and from 0.5-1.0 parts of said extrinsic metal catalyst.
Claim 5
Dependent Claim
19 words
A process in accordance with claim 3 wherein said fatty acid is a C 8 -C 20 fatty acid.
Claim 6
Dependent Claim
14 words
A process in accordance with claim 4 wherein said extrinsic metal catalyst is ruthenium.
Claim 7
Dependent Claim
14 words
A process in accordance with claim 4 wherein said extrinsic metal catalyst is rhodium.
Claim 8
Dependent Claim
14 words
A process in accordance with claim 4 wherein said extrinsic metal catalyst is platinum.
Claim 9
Dependent Claim
14 words
A process in accordance with claim 4 wherein said extrinsic metal catalyst is palladium.
Claim 10
Dependent Claim
18 words
A process in accordance with claim 4 wherein said activated rhenium is generated in situ from rhenium heptoxide.
Claim 11
Dependent Claim
25 words
A process in accordance with claim 1 wherein said hydrogenation reaction is conducted in a continuous flow reactor containing said co-catalyst system prepared ex situ.
References Cited (Backward Citations)
US3736265A
Cited
US3947563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |