METHOD FOR PRODUCING AROMATIC HYDROCARBONS, AND AROMATIC HYDROCARBON PRODUCTION PLANT

摘要

Provided is a method for producing aromatic hydrocarbons, comprising: a step (a) in which oil feedstock such as LCO is brought into contact with a catalyst for aromatic production to obtain a reaction product containing aromatic hydrocarbons; a step (b) in which the reaction product is separated into column top fraction and column bottom fraction by means of a distillation column; a step (c) in which the column top fraction is separated into a crude aromatic fraction containing an LPG fraction and off gas containing hydrogen; a step (d) of separating the crude aromatic fraction containing an LPG fraction into the LPG fraction and a crude aromatic fraction; a step (e) of separating off gas containing hydrogen into hydrogen and off-gas; and a step (f) in which the hydrogen obtained in step (e) is used to hydrocrack the crude aromatic fraction to obtain an aromatic fraction.