Patent ID: 9656232
Date: 2017-05-23
CPC Classifications: B01D,B01J,C07C,C10G

Claim:
1. A method for producing aromatic hydrocarbons, the method comprising: (a) bringing one or more feedstock oils into contact with an aromatic production catalyst to conduct a dehydrogenation reaction to obtain a reaction product containing aromatic hydrocarbons and hydrogen under a pressure range of from 0.1 to 1.5 MPaG, (b) separating the reaction product into a tower top fraction and a tower bottom fraction using a distillation tower, wherein the tower top fraction comprises BTX and the tower bottom fraction comprises a C (c) separating the tower top fraction into an LPG fraction-containing crude aromatic fraction, and an off-gas stream containing the hydrogen produced by the dehydrogenation reaction, (d) separating the LPG fraction-containing crude aromatic fraction into an LPG fraction and a crude aromatic fraction, (e) separating the off-gas stream into hydrogen and an off-gas, and (f) using the hydrogen produced by the dehydrogenation reaction obtained in the step (e) to hydrotreat the crude aromatic fraction, thereby obtaining an aromatic fraction, wherein the one or more feedstock oils is selected from the group consisting of light cycle oil obtained from a fluid catalytic cracking apparatus, hydrotreated light cycle oil, and naphtha and straight-run gas oil obtained from a crude oil distillation apparatus, and wherein the aromatic production catalyst comprises a crystalline aluminosilicate containing gallium and phosphorous having an amount of the phosphorus within a range from 0.1 to 10.0% by mass relative to the total mass of the aromatic production catalyst.