The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 1987
Filed:
Oct. 10, 1986
Friedrich-Wilhelm Moller, Friedrichsdorf, DE;
Walter Boll, Frankfurt am Main, DE;
Friedemann Marschner, Oberursel, DE;
Wolf-Dieter Muller, Bad Homburg, DE;
Metallgesellschaft Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
The methanol vapor is mixed with a gas mixture which consists mainly of carbon dioxide and hydrogen and a high-methanol mixed feedstock is thus obtained. The mixed feedstock is fed to a first catalytic breakdown zone at an entrance temperature from 300.degree. to 400.degree. C., which contains a zinc-containing catalyst, which is indirectly heated. An intermediate having a methanol content not in excess of 1% by volume is withdrawn at a temperature in the range from 350.degree. to 600.degree. C. from the first breakdown zone and is cooled. Condensed water is removed at least in part from the intermediate, which is subsequently heated to a temperature in the range from 320.degree. to 420.degree. C. At least one-half of the heated intermediate product is supplied to a second catalytic breakdown zone, which also contains a zinc-containing catalyst, which is indirectly heated. A precursor product is withdrawn from the second breakdown zone at temperature from 350.degree. to 600.degree. C. and is cooled and aqueous condensate is withdrawn from the precursor. The product, which is subsequently supplied at an entrance temperature from 20.degree. to 80.degree. to and is passed through a separating zone, which contains a multiplicity of selectively permeable membranes. First and second gas streams are withdrawn from the separating zones. The first gas stream contains at least 90% by volume CO.sub.2 and H.sub.2. The second gas stream contains at least 30% by volume CO. The first gas stream is enriched with CO.sub.2 to provide a gas mixture, which is mixed with the methanol vapor.