Patent US3950369A successfully refreshed from Google Patents.
US3950369A
Expired / Lapsed
US
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Methanol production
Assignee: Imperial Chemical Industries Ltd
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Filing: 1974-03-28
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Granted: 1976-04-13
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Expires: 1994-03-28
Abstract
Abstract In a methanol production process synthesis gas containing carbon dioxide is passed over a methanol synthesis catalyst, cooled to remove part of the methanol and water contained in the gas, scrubbed with a liquid to remove substantially the remainder of the methanol contained in the gas, then recycled to the methanol synthesis catalyst. The process affords an economically significant increase in the rate of methanol recovery, especially when the synthesis is operated at low pressures in warm climates.
Inventors
- 👤 Alan Edward Alford Gent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:47
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/15; C07C29/151; C07C29/153; C07C29/154; B; B01; B01J; B01J8/00; B01J8/02; C07C29/1512; C07C29/74; C07C29/76; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00265; B01J2208/00274
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
In a process for the production of methanol by passing a gas comprising hydrogen and carbon dioxide over a methanol synthesis catalyst which consists essentially of copper, zinc and a third component which is chromium or a metal oxide from Groups II to IV of the Periodic Table at a pressure below 150 atmospheres and a temperature up to 300°C. to form a gaseous reaction mixture including methanol and water and unreacted carbon dioxide and then recovering the methanol from said gaseous reaction mixture, the improvement whereby the efficiency of the methanol recovery is increased, said improvement comprising the steps of cooling said gaseous reaction mixture to condense part of the methanol and water therein, scrubbing the remaining gaseous mixture with water to remove substantially the remainder of the methanol therefrom and recycling the scrubbed gas for further contact with said methanol synthesis catalyst.
Claim 2
Dependent Claim
144 words
In a process for the production of methanol by passing a gas comprising hydrogen and carbon dioxide over a methanol synthesis catalyst which consists essentially of copper, zinc and a third component which is chromium or a metal oxide from Groups II to IV of the Periodic Table at a pressure below 150 atmospheres and a temperature up to 300°C. to form a gaseous reaction mixture including methanol and water and unreacted carbon dioxide and then recovering the methanol from said gaseous reaction mixture, the improvement whereby the efficiency of the methanol recovery is increased, said improvement comprising the steps of cooling said gaseous reaction mixture to condense part of the methanol and water therein, scrubbing the remaining gaseous mixture with water to remove substantially the remainder of the methanol therefrom and recycling the scrubbed gas for further contact with said methanol synthesis catalyst.
Claim 3
Dependent Claim
16 words
A process according to claim 1 in which the pressure is in the range 40-80 atmospheres.
Claim 4
Dependent Claim
31 words
A process according to claim 1 in which the methanol synthesis stage is at a temperature in the range 160°-300°C and the reaction mixture is cooled to 35°- 50°C before scrubbing.
Claim 5
Dependent Claim
36 words
A process according to claim 1 wherein the carbon dioxide gas is used in admixture with carbon monoxide and the proportion of carbon dioxide in the mixture is between half and double that of carbon monoxide.
Claim 6
Dependent Claim
75 words
A process according to claim 1 wherein the mixture obtained when the gaseous reaction mixture is cooled to condense methanol and water therein is fed to a separation stage where the uncondensed gas is separated from condensed methanol and water, and the thus separated gas is scrubbed, before it is recycled, the separation of the condensed methanol and water in said separation stage being carried out in the presence of liquid effluent from said scrubbing.
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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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |