| abstract |
This invention is a manufacturing method of monocyclic aromatic hydrocarbon which makes the reaction product containing monocyclic aromatic hydrocarbon contact with raw material oil whose 10 volume% effluent temperature is 140 degreeC or more, and 90 volume% effluent temperature is 380 degreeC or less, and an aromatic production catalyst is produced. A step of introducing the raw material oil into a decomposition reforming reaction device (10) containing the aromatic production catalyst, contacting the raw material oil with the aromatic production catalyst in the decomposition reforming reaction device (10); A heating step of heating the raw material oil to form a gas-liquid mixed stream in advance before introducing the raw material oil into the decomposition reforming reactor 10, and a gas-liquid separation step of gas-liquid separating the gas-liquid mixed stream into a gaseous fraction and a liquid fraction. And an introduction step of introducing the gaseous fraction and the liquid fraction into different positions in the decomposition reforming reactor 10, respectively. All. |