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US3950369A Expired / Lapsed US ⏱️ 0.0 years remaining

Methanol production

Assignee: Imperial Chemical Industries Ltd
•
Filing: 1974-03-28
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Granted: 1976-04-13
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Expires: 1994-03-28
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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 03:34
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.

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

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