Method for methanol synthesis
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United States of America Patent
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Jun 4, 2019
Grant Date -
Oct 25, 2018
app pub date -
May 10, 2016
filing date -
May 11, 2015
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Abstract
In a process for methanol production from synthesis gas, which comprises the steps of providing a make-up gas containing hydrogen and carbon monoxide, in which the content of carbon dioxide is less than 0.1 mole %, mixing the make-up gas with a hydrogen-rich recycle gas and passing the gas mixture to a methanol synthesis reactor, optionally via a sulfur guard, and subjecting the effluent from the synthesis reactor to a separation step, thereby providing crude methanol and the hydrogen-rich recycle gas, the customary addition of carbon dioxide to the make-up gas is replaced by addition of water in an amount of 0.1 to 5 mole %. This way, a CO2 compressor is saved, and the amount of poisonous sulfur in the make-up gas is markedly reduced.
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