US4398039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of carboxylic acids
Assignee: Standard Oil Co
•
Filing: 1981-05-18
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Granted: 1983-08-09
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Expires: 2001-05-18
Abstract
Abstract A process is provided for the vapor phase hydrogenation of carboxylic acids to yield their corresponding alcohols in the presence of steam and a catalyst comprising the mixed oxides of ruthenium, at least one of cobalt, nickel, and optionally one of cadmium, zinc, copper, iron, rhodium, palladium, osmium, iridium and platinum. A process is further provided for the preparation of carboxylic acid esters from carboxylic acids in the absence of steam utilizing the above-identified catalysts.
Inventors
- 👤 Frederick A. Pesa
- 👤 Anne M. Graham
- 👤 Wayne R. Kliewer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:57
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/132; C07C29/136; C07C29/147; C07C29/149; C07C67/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A process for the production of carboxylic acid esters having from 2 to 20 carbon atoms from aliphatic carboxylic acids having from 1 to 10 carbon atoms, including contacting said carboxylic acids with hydrogen in the vapor phase in the absence of water in excess of the amount of water vapor formed in situ, at a reaction temperature from about 150° C. to about 450° C. and a reaction pressure of about 250 psig to about 5000 psig in the presence of a catalyst represented by the formula Zn.sub.a Ru.sub.b D.sub.c E.sub.d O.sub.x wherein D=Co, Ni and mixtures thereof; E=Cd, Fe, Cu,, Rh, Pd, Os, Ir, Pt and mixtures thereof; and wherein a=greater than 0 to 1, b=0.01 to 3, c=0.01 to 3, d=0 to 1, x=the number of oxygens determined by the valence requirements of the other elements.
Claim 2
Dependent Claim
139 words
A process for the production of carboxylic acid esters having from 2 to 20 carbon atoms from aliphatic carboxylic acids having from 1 to 10 carbon atoms, including contacting said carboxylic acids with hydrogen in the vapor phase in the absence of water in excess of the amount of water vapor formed in situ, at a reaction temperature from about 150° C. to about 450° C. and a reaction pressure of about 250 psig to about 5000 psig in the presence of a catalyst represented by the formula Zn.sub.a Ru.sub.b D.sub.c E.sub.d O.sub.x wherein D=Co, Ni and mixtures thereof; E=Cd, Fe, Cu,, Rh, Pd, Os, Ir, Pt and mixtures thereof; and wherein a=greater than 0 to 1, b=0.01 to 3, c=0.01 to 3, d=0 to 1, x=the number of oxygens determined by the valence requirements of the other elements.
Claim 3
Dependent Claim
16 words
A process as set forth in claim 1 wherein butyl butyrate is produced from butyric acid.
Claim 4
Dependent Claim
13 words
A process as set forth in claim 1 wherein said catalyst contains Co.
Claim 5
Dependent Claim
13 words
A process as set forth in claim 1 wherein said catalyst contains Ni.
Claim 6
Dependent Claim
15 words
A process as set forth in claim 1 wherein said catalyst contains Co and Ni.
Claim 7
Dependent Claim
22 words
A process as set forth in claim 1 wherein said catalyst is represented by the formula RuCoNiZn 0 .4 O x .
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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) | 1986-08-08 | 1987-02-07 | 1987-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-08 | 1991-02-07 | 1991-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-08 | 1995-02-07 | 1995-08-09 | $7700.00 | Window Closed / Lapsed |