C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
48/27
C01B 3/22 (2006.01) C01B 3/32 (2006.01)
Patent
CA 1253343
ABSTRACT OF THE DISCLOSURE: 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 to 400°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 An intermediate having a methanol content not in excess of 1% by volume is withdrawn at a temperature in the range from 350 to 600 C from the first breakdown zone and is cooled.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 to 420 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 A precursor product is withdrawn from the second breakdown zone at temperatures from 350 to 600°C and is cooled and aqueous condensate is withdrawn from the precursor. The product, which is subsequently supplied at an entrance temperature from 20 to 80° to and is passed through a separating zone, which contains a multiplicity of selec- tively permeable membranes. First and second gas streams are withdrawn from the separating zone. The first gas stream contains at least 90% by volume CO2 and H2. The second gas stream contains at least 30% by volume CO. The first gas stream is enriched with CO2 to provide a gas mixture, which is mixed with the methanol vapor.
520534
Boll Walter
Marschner Friedemann
Moller Friedrich-Wilhelm
Muller Wolf-Dieter
Metallgesellschaft Aktiengesellschaft
Robic Robic & Associes/associates
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