Process for Treating Gasoline

A process for treating gasoline, comprising:

• 1) splitting a gasoline feedstock into a light gasoline fraction and a heavy gasoline fraction;
• 2) subjecting at least a portion of the resulting light gasoline fraction to etherification to obtain an etherified oil;
• and
• 3) contacting the resulting heavy gasoline fraction with a mixed catalyst and subjecting it to desulfurization and aromatization in the presence of hydrogen to obtain a heavy gasoline product;
• wherein the mixed catalyst comprises an adsorption desulfurization catalyst and an aromatization catalyst, and the aromatization catalyst is selected from the group consisting of a fresh aromatization catalyst, a passivated aromatization catalyst, an aged aromatization catalyst, or any combination thereof.

A system for treating gasoline, comprising a gasoline feedstock fractionation column (2) and a desulfurization-aromatization reactor (5), wherein the gasoline feedstock fractionation column (2) is provided with a gasoline feedstock inlet, a heavy gasoline fraction outlet, and a light gasoline fraction outlet;

• the desulfurization-aromatization reactor (5) is provided with a heavy gasoline fraction inlet, a hydrogen inlet, and a desulfurization-aromatization product outlet;
• the heavy gasoline fraction outlet of the gasoline feedstock fractionation column (2) is in fluid communication with the heavy gasoline fraction inlet of the desulfurization-aromatization reactor (5),
• wherein a gasoline feedstock (1) is introduced into the gasoline feedstock fractionation column (2) through the gasoline feedstock inlet, and subjected to fractionation therein to obtain a light gasoline fraction (10) and a heavy gasoline fraction (3);
• the heavy gasoline fraction (3) is introduced into the desulfurization-aromatization reactor (5) through the heavy gasoline fraction inlet, and subjected to desulfurization and aromatization in the presence of hydrogen to obtain a desulfurization-aromatization product (6);
• and
• optionally, the system further comprises a high pressure separator (7) and a mixer (19), the high pressure separator (7) being provided with a desulfurization-aromatization product inlet, an olefin-containing tail gas outlet, and a heavy gasoline product outlet, wherein the desulfurization-aromatization product outlet of the desulfurization-aromatization reactor (5) is in fluid communication with the desulfurization-aromatization product inlet of the high pressure separator (7);
• the heavy gasoline product outlet of the high pressure separator (7) is in fluid communication with an inlet of the mixer (19) and the light gasoline fraction outlet of the gasoline feedstock fractionation column (2) is in fluid communication with an inlet of the mixer (19), wherein the desulfurization-aromatization product (6) is separated in the high pressure separator (7) to produce an olefin-containing tail gas (8) and a heavy gasoline product (9), and the light gasoline fraction (10) is mixed with the heavy gasoline product (9) in the mixer (19) to obtain a gasoline product.