Methanol synthesis

Details Methanol synthesis Methanol synthesis

C - Chemistry, Metallurgy

07

C

C07C 31/04 (2006.01) C07C 29/152 (2006.01)

Patent

CA 2110373

The purge gas from a methanol synthesis loop is subjected to a further step of methanol synthesis, preferably while in indirect heat exchange with the purge gas undergoing heating to the synthesis inlet temperature so that the reacted purge gas, containing synthesised methanol, leaves the synthesis catalyst at a temperature below the maximum temperature achieved by the reacting purge gas during passage over the catalyst. The synthesis loop can be operated less efficiently, eg at a lower pressure or with added carbon dioxide, than is conventional since the additional methanol produced from the purge gas compensates for the loss of loop efficiency. The addition of the purge gas synthesis stage enables existing plants to be uprated by lowering the loop pressure, thus enabling a greater throughput through the synthesis gas compressor to be achieved.

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