Method for producing paraxylene

A method for producing paraxylene from synthesis gas obtained by gasifying carbon-containing raw materials, comprising a mixing step of obtaining a raw material mixed gas by adding hydrogen to the synthesis gas;

• a reaction step of obtaining a mixed gas product containing paraxylene by introducing the raw material mixed gas into a reactor and bringing it into contact with a paraxylene synthesis catalyst under heating and pressurization;
• a separation step of separating the mixed gas product into a gas phase composed of non-condensable components, an oil phase containing paraxylene, and an aqueous phase containing water-soluble components by cooling the mixed gas product to condense high-boiling point components;
• and a purification step of purifying the oil phase to obtain paraxylene,
• wherein the mixing step adds hydrogen so that the obtained raw material mixed gas has a composition in which an R value defined by the following formula (1)
• [
• Math
• .
• 1
• ]
• 
• R
• =
• N
• H
• ⁢
• 2
• -
• N
• CO
• ⁢
• 2
• N
• CO
• +
• N
• CO
• ⁢
• 2
• (
• 1
• )
• (where NH2 represents a molar fraction of hydrogen, NCO represents a molar fraction of carbon monoxide, and NCO2 represents a molar fraction of carbon dioxide) falls within a range of 0.7 or more and 2.1 or less.