US4456775A
Expired / Lapsed
US
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Catalytic process for manufacturing alcohols by hydrogenolysis of carboxylic acid esters
Assignee: IFP Energies nouvelles
•
Filing: 1983-05-24
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Granted: 1984-06-26
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Expires: 2003-05-24
Abstract
Abstract Alcohols and particularly fatty alcohols are manufactured by hydrogenolysis of carboxylic esters in the presence of a catalyst comprising a carrier, rhodium and at least one second element selected from the group consisting of tin, germanium and lead. The rhodium content is from 0.1 to 5% b.w. and the content of the second element is from 0.1 to 10% b.w.
Inventors
- 👤 Christine Travers
- 👤 Chan Trinh Dinh
- 👤 Roger Snappe
- 👤 Jean-Paul Bournonville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:53
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C29/149; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/62; B01J23/622; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
46 words
In a process for manufacturing alcohols, wherein an ester of a carboxylic acid is treated with hydrogen in the presence of a catalyst, the improvement wherein the catalyst comprises a carrier, rhodium, and at least one second element, being tin, germanium, lead or a mixture thereof.
Claim 2
Dependent Claim
46 words
In a process for manufacturing alcohols, wherein an ester of a carboxylic acid is treated with hydrogen in the presence of a catalyst, the improvement wherein the catalyst comprises a carrier, rhodium, and at least one second element, being tin, germanium, lead or a mixture thereof.
Claim 3
Dependent Claim
32 words
A process according to claim 1, wherein the rhodium content of the catalyst is from 0.1 to 5% b.w. and the content of the second element is from 0.1 to 10% b.w.
Claim 4
Dependent Claim
32 words
A process according to claim 1, wherein the rhodium content of the catalyst is from 0.5 to 2% b.w. and the content of the second element is from 2 to 5% b.w.
Claim 5
Dependent Claim
28 words
A process according to claim 1 wherein the carrier has a surface of 10 to 500 m 2 /g and a pore volume of 0.2 to 1.3 cc/g.
Claim 6
Dependent Claim
28 words
A process according to claim 1, wherein the carrier has a surface of 50 to 500 m 2 /g and a pore volume of 0.5 to 1.1 cc/g.
Claim 7
Dependent Claim
11 words
A process according to claim 1, wherein the carrier is alumina.
Claim 8
Dependent Claim
11 words
A process according to claim 1, wherein the carrier is silica.
Claim 9
Dependent Claim
23 words
A process according to claim 1, wherein the pressure is from 10 to 100 bars and the temperature from 180° to 330° C.
Claim 10
Dependent Claim
23 words
A process according to claim 1, wherein the pressure is from 30 to 80 bars and the temperature from 200° to 280° C.
Claim 11
Dependent Claim
16 words
A process according to claim 1, wherein the molar ratio hydrogen/ester is from 2:1 to 10:1.
Claim 12
Dependent Claim
15 words
A process according to claim 10, wherein said molar ratio is from 2:1 to 5:1.
Claim 13
Dependent Claim
18 words
A process according to claim 1, wherein the carrier has a specific surface of 10-500 m 2 /g.
Claim 14
Dependent Claim
15 words
A process according to claim 12, wherein said specific surface is 50-500 m 2 /g.
Claim 15
Dependent Claim
23 words
A process according to claim 1, wherein the carrier has a total pore volume of 20-130 cm 3 per 100 g of carrier.
Claim 16
Dependent Claim
19 words
A process according to claim 14, wherein said pore volume is 50-110 cm 3 per 100 g of carrier.
Claim 17
Dependent Claim
36 words
A process according to claim 1, wherein said ester has the formula R 1 --COOR 2 , wherein R 1 is a saturated or unsaturated C 1-20 hydrocarbyl group, and R 2 is C 1-10 alkyl.
References Cited (Backward Citations)
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Cited
US2322095A
Cited
FR1518181A
Cited
US3829448A
Cited
US3769331A
Cited
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |