Patent US3944604A successfully refreshed from Google Patents.
US3944604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of propionic acid
Assignee: BP Chemicals Ltd
•
Filing: 1973-08-21
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Granted: 1976-03-16
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Expires: 1993-08-21
Abstract
Abstract The present invention relates to an improved process for the preparation of propionic acid, specifically by the reaction of ethylene with carbon monoxide and water at mild pressure, in the presence of catalyst compositions essentially comprising critical proportions of cobalt compounds with an iodide promoter.
Inventors
- 👤 Arnold Hershman
- 👤 Denis Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:19
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/0231; B01J31/04; B01J31/26; C; C07; C07C; C07C51/00; C07C51/10; C07C51/14; B01J2231/00; B01J2231/30; B01J2231/32; B01J2231/323
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
68 words
A one step, low-pressure process for the preparation of propionic acid which comprises reacting ethylene with carbon monoxide and water at a temperature of 50°C to 300°C and a partial pressure of carbon monoxide of from 1 to 1500 psia in the presence of 1. a cobalt component; 2. an iodide component wherein the range of atomic ratios of said iodide to cobalt is from 2.1:1 to 35:1.
Claim 2
Dependent Claim
68 words
A one step, low-pressure process for the preparation of propionic acid which comprises reacting ethylene with carbon monoxide and water at a temperature of 50°C to 300°C and a partial pressure of carbon monoxide of from 1 to 1500 psia in the presence of 1. a cobalt component; 2. an iodide component wherein the range of atomic ratios of said iodide to cobalt is from 2.1:1 to 35:1.
Claim 3
Dependent Claim
101 words
A one step, low-pressure process for the preparation of propionic acid which comprises reacting ethylene with carbon monoxide and water at a temperature of 50°C to 300°C and a partial pressure of carbon monoxide of from 1 to 1500 psia in the presence of 1. a cobalt component; 2. an iodide component wherein the range of atomic ratios of said iodide to cobalt is from 2.1:1 to 35:1, the said catalyst system existing as an aqueous solution of a carboxylic acid having from 2 to 20 carbon atoms, the said aqueous solution containing from 0.1% to 25% by weight of water.
Claim 4
Dependent Claim
101 words
A one step, low-pressure process for the preparation of propionic acid which comprises reacting ethylene with carbon monoxide and water at a temperature of 50°C to 300°C and a partial pressure of carbon monoxide of from 1 to 1500 psia in the presence of 1. a cobalt component; 2. an iodide component wherein the range of atomic ratios of said iodide to cobalt is from 2.1:1 to 35:1, the said catalyst system existing as an aqueous solution of a carboxylic acid having from 2 to 20 carbon atoms, the said aqueous solution containing from 0.1% to 25% by weight of water.
Claim 5
Dependent Claim
68 words
A one step, low-pressure process for the preparation of propionic acid which comprises reacting ethylene with carbon monoxide and water at a temperature of 50°C to 300°C and a partial pressure of carbon monoxide of from 1 to 1500 psia in the presence of 1. a cobalt component; 2. an iodide component, wherein the range of atomic ratios of said iodide to cobalt is from 2.5:1 to 25:1.
Claim 6
Dependent Claim
68 words
A one step, low-pressure process for the preparation of propionic acid which comprises reacting ethylene with carbon monoxide and water at a temperature of 50°C to 300°C and a partial pressure of carbon monoxide of from 1 to 1500 psia in the presence of 1. a cobalt component; 2. an iodide component, wherein the range of atomic ratios of said iodide to cobalt is from 2.5:1 to 25:1.
Claim 7
Dependent Claim
101 words
A one step, low-pressure process for the preparation of propionic acid which comprises reacting ethylene with carbon monoxide and water at a temperature of 50°C to 300°C and a partial pressure of carbon monoxide of from 1 to 1500 psia in the presence of 1. a cobalt component; 2. an iodide component, wherein the range of atomic ratios of said iodide to cobalt is from 2.5:1 to 25:1, the said catalyst system existing as an aqueous solution of a carboxylic acid having from 2 to 20 carbon atoms, the said aqueous solution containing from 0.1: to 25% by weight of water.
Claim 8
Dependent Claim
101 words
A one step, low-pressure process for the preparation of propionic acid which comprises reacting ethylene with carbon monoxide and water at a temperature of 50°C to 300°C and a partial pressure of carbon monoxide of from 1 to 1500 psia in the presence of 1. a cobalt component; 2. an iodide component, wherein the range of atomic ratios of said iodide to cobalt is from 2.5:1 to 25:1, the said catalyst system existing as an aqueous solution of a carboxylic acid having from 2 to 20 carbon atoms, the said aqueous solution containing from 0.1: to 25% by weight of water.
Claim 9
Dependent Claim
21 words
A process as in claim 1 in which the partial pressure of carbon monoxide is from 25 psia to 800 psia.
Claim 10
Dependent Claim
21 words
A process as in claim 2 in which the partial pressure of carbon monoxide is from 25 psia to 800 psia.
Claim 11
Dependent Claim
14 words
A process as in claim 1 in which the iodide component is ethyl iodide.
Claim 12
Dependent Claim
14 words
A process as in claim 2 in which the iodide component is ethyl iodide.
Claim 13
Dependent Claim
14 words
A process as in claim 1 in which the cobalt component is cobalt iodide.
Claim 14
Dependent Claim
14 words
A process as in claim 2 in which the cobalt component is cobalt iodide.
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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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |