Methanol Synthesis

Details Methanol Synthesis Methanol Synthesis

1993-11-23

1995-06-13

Mars, Howard T.

Chemistry: fischer-tropsch processes; or purification or recover

Plural zones each having a fischer-tropsch reaction

518707, C07C 29151

Patent

active

054243351

ABSTRACT:
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 synthesized 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.

REFERENCES:
patent: 3615200 (1971-10-01), Konoki
patent: 4226795 (1980-10-01), Bowman
patent: 4407973 (1983-10-01), Van Dijk et al.
patent: 4778662 (1988-10-01), Pinto
Derwent Abstract of RO 102380 Feb. 1989.
PEJ Abbott: "Methanol Reactor Design Choices", paper presented at the 1992 World Methanol Conference, Monte Carlo, Monaco on Dec. 8-10, 1992.

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