| 摘要 |
A process and a device are for the methanol synthesis from hydrogen, carbon monoxide and carbon dioxide under pressure, in particular for increasing the yield of processes already in use. Desulphurized natural gas is charged in a reformer and the synthesis gas is subsequently admitted to a methanol synthesis. There are the advantages that a favorable possibility for refitting existing plants is provided, and synthesis gas from external sources can be used. This is accomplished in the process in that after passing through the reformer, a side stream from the synthesis gas stream is supplied to a methanol pre-reactor. The methanol produced in the pre-reactor is supplied to the methanol stream exiting from the methanol synthesis of the main stream. A stream of synthesis gas non-reacted in the methanol pre-reactor is recycled into the main stream upstream of the methanol synthesis. An additional synthesis gas compensating the incurred loss is simultaneously charged within the zone of said feed into the main stream.
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