Methods for producing aromatics and olefins

A method for producing aromatics from a coker naphtha stream containing coker naphtha, the method comprising:

• (a) removing silica and particulates from the coker naphtha stream to obtain a pretreated coker naphtha stream;
• (b) hydrogenating the pretreated coker naphtha stream in the presence of a first catalyst to remove diolefins and sulfur to obtain a hydrogenated stream comprising olefins;
• and
• (c) subjecting the hydrogenated stream to an aromatization process in the presence of a second catalyst to produce an aromatic-rich stream comprising at least about 40% by weight of aromatic compounds;
• wherein the coker naphtha has a boiling point of from about 25° C. to 85° C. and comprises silica and particulates;
• wherein the second catalyst has a metal oxide loading of about 0.2 wt % to about 1.5 wt % and is selected from the group consisting of Ga/Pt/Ge/ZSM-5, Pt/Ge/ZSM-5 and Ni—W/Ga/ZSM-5, or the second catalyst is Ga/Nd/ZSM-5;
• and
• wherein the coker naphtha stream comprises from about 0.5 wt % to about 5 wt % aromatics.

A method for producing olefins from a coker naphtha stream containing diolefins and sulfur, the method comprising:

• (a) hydrogenating the coker naphtha stream, wherein the coker naphtha stream contains coker naphtha, wherein the coker naphtha has a boiling point of from about 25° C. to 85° C. in the presence of a first catalyst to remove the diolefins and the sulfur to obtain a hydrogenated stream;
• and
• (b) subjecting the hydrogenated stream to catalytic cracking in the presence of a second catalyst at a pressure from about 50 to about 300 kPa to produce an olefin-rich stream comprising ethylene, propylene and aromatics, wherein the second catalyst has a metal oxide loading of about 2 wt % to about 10 wt % and is selected from the group consisting of Ga/Pt/Ge/ZSM-5, Pt/Ga/ZSM-5, Pt/Ge/ZSM-5 and Ni—W/Ga/ZSM-5, or the second catalyst is Ga/Nd/ZSM-5;
• wherein the method further comprises removing silica and particulates from the coker naphtha stream prior to hydrogenation;
• and
• wherein the coker naphtha stream comprises from about 0.5 wt % to about 5 wt % aromatics.