| abstract |
This method for producing monocyclic aromatic hydrocarbons involves producing monocylic aromatic hydrocarbons with 6 to 8 carbon atoms, and comprises: a decomposition reforming reaction step in which oil feedstock is brought into contact with a catalyst to produce a reaction, thereby obtaining a product containing monocyclic aromatic hydrocarbons with 6 to 8 carbon atoms, and a heavy distillate with 9 or more carbon atoms; a purification and recovery step for purifying and recovering the monocyclic aromatic hydrocarbons with 6 to 8 carbon atoms, which were separated from the product generated in the decomposition reforming reaction step; and a first return step for returning at least some of the toluene obtained in the purification and recovery step to the decomposition reforming reaction step. |