US4253987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Homologation process for the production of ethanol from methanol
Assignee: Union Carbide Corp
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Filing: 1980-04-10
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Granted: 1981-03-03
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Expires: 2000-04-10
Abstract
Abstract A process for producing ethanol from the reaction of methanol, hydrogen and carbon monoxide catalyzed by a phosphine-iodine promoted cobalt-ruthenium catalyst, the improvement of maintaining the phosphine to halide ratio and concentration within a critical range, and whereby the concentration of phosphine compound in the reaction mixture is increased without causing an undesirable decrease in the activity of the catalyst; thereby obtaining a highly stable and active catalyst providing an increased selectivity to ethanol formation . This is accomplished under such conditions that the catalyst stability is maintained and the ratio of phosphine to halide is kept at a relatively constant value during the reaction.
Inventors
- 👤 Rocco A. Fiato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:42
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/24; B01J31/2404; C; C07; C07C; C07C29/00; C07C29/32; B01J2231/00; B01J2231/60; B01J2231/64; B01J2231/641; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/821; B01J2531/84; B01J2531/845; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
136 words
A catalyst for the production of ethanol by the reaction of methanol, hydrogen and carbon monoxide wherein the mole ratio of hydrogen to carbon monoxide is about 2:1 or more; comprising cobalt, ruthenium, an iodine promoter, and a phosphine ligand of the furmula ##STR2## wherein P is phosphorous and R 1 , R 2 and R 3 when taken individually are monovalent alkyl having from 1 to 20 carbon atoms; aryl, aralkyl or alkaryl having from 6 to 10 ring carbon atoms; cycloalkyl, having from 5 to 8 carbon atoms; and when any two taken together are a divalent alkylene having from 2 to 6 carbon atoms; wherein the mole ratio of said phosphine ligand to total halide is from 1:0.36 to 1:5 and the mole ratio of said phosphine ligand to said cobalt exceeds 1.5:1.
Claim 2
Dependent Claim
136 words
A catalyst for the production of ethanol by the reaction of methanol, hydrogen and carbon monoxide wherein the mole ratio of hydrogen to carbon monoxide is about 2:1 or more; comprising cobalt, ruthenium, an iodine promoter, and a phosphine ligand of the furmula ##STR2## wherein P is phosphorous and R 1 , R 2 and R 3 when taken individually are monovalent alkyl having from 1 to 20 carbon atoms; aryl, aralkyl or alkaryl having from 6 to 10 ring carbon atoms; cycloalkyl, having from 5 to 8 carbon atoms; and when any two taken together are a divalent alkylene having from 2 to 6 carbon atoms; wherein the mole ratio of said phosphine ligand to total halide is from 1:0.36 to 1:5 and the mole ratio of said phosphine ligand to said cobalt exceeds 1.5:1.
Claim 3
Dependent Claim
20 words
The catalyst as claimed in claim 1 wherein the said mole ratio of ligand to total halide is about 1:0.45.
Claim 4
Dependent Claim
20 words
The catalyst as claimed in claim 1 wherein the said mole ratio of ligand to total halide is about 1:0.6.
Claim 5
Dependent Claim
19 words
The catalyst as claimed in claim 1 wherein the said mole ratio of ligand to cobalt is about 3.33:1.
Claim 6
Dependent Claim
19 words
The catalyst as claimed in claim 1 wherein the said mole ratio of ligand to cobalt is about 5:1.
Claim 7
Dependent Claim
15 words
The catalyst as claimed in claim 1 wherein the said cobalt is cobalt acetate tetrahydrate.
Claim 8
Dependent Claim
15 words
The catalyst as claimed in claim 1 wherein the said iodine promoter is elemental iodine.
Claim 9
Dependent Claim
14 words
The catalyst as claimed in claim 1 wherein the said ruthenium is ruthenium trichloride.
Claim 10
Dependent Claim
14 words
The catalyst as claimed in claim 1 wherein the said ruthenium is triruthenium dodecacarbonyl.
Claim 11
Dependent Claim
14 words
The catalyst as claimed in claim 1 wherein the said phosphine ligand is tricyclohexylphosphine.
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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |