Process for the production of methanol

Details Process for the production of methanol Process for the production of methanol

C - Chemistry, Metallurgy

07

C

C07C 31/04 (2006.01) C01B 3/38 (2006.01) C07C 29/151 (2006.01) C07C 29/152 (2006.01)

Patent

CA 2134406

ABSTRACT A process for the production of methanol, which exhibits high energy efficiency and permits the production of methanol with apparatus of which the production capacity can be increased, the process comprising a primary reforming step of catalytically reacting a hydrocarbon with steam, a partial oxidation step of partially oxidizing a gas fed from the above primary reforming reaction step by adding an oxygen gas, a secondary reforming step of catalytically reacting a gas fed from the above partial oxidation step with steam, a step of using a high-temperature gas obtained from the secondary reforming reaction step, as a heat source for the primary reforming step, a synthesis gas prepartion step of separating steam from the gas used as the above heat source to prepare a synthesis gas, and a methanol synthesis step of introducing the synthesis gas into a methanol synthesis reactor using a fluid catalyst, wherein: the molar ratio of hydrogen to carbon oxides in the feed gas to into the methanol synthesis reactor, represented by [H2/(2CO + 3CO2)], is set at from 1.0 to 2.7, the molar ratio of CO2/CO in the feed gas into the methanol synthesis reactor is set at from 0.6 to 1.2, a gas from the methanol synthesis reactor is partially introduced into the methanol synthesis reactor as a circulating gas together with the synthesis gas, and a remaining part of the gas from the methanol synthesis reactor is introduced into the reforming step as a purge gas together with the hydrocarbon as a raw material.

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