| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for simply producing xylene with high yield even though a catalytically cracked gasoline, which has a low aromatic hydrocarbon content ratio and contains an unsaturated hydrocarbon, a sulfur content, and a nitrogen content, is used as a starting material for a conversion reaction such as a disproportionation reaction or a transalkylation reaction.SOLUTION: A method for producing xylene comprises: (a) a fractional distillation step for conducting fractional distillation to obtain a distillate fraction having a boiling point range of 145 to 205°C by subjecting a fluid catalytically cracked gasoline to distillation; (b) a hydrogenation step for adjusting the sulfur content to 0 to 6 ppm by mass and the nitrogen content to 0 to 6 ppm by mass by subjecting the distillate fraction obtained in the fractional distillation step (a) and having the boiling point range of 145 to 205°C to a hydrodesulfurization/denitrification reaction; and (c) a disproportionation/transalkylation step for subjecting a product oil obtained in the hydrogenation step (b) and containing an aromatic hydrocarbon to a disproportionation reaction or a transalkylation reaction. |
