Selective hydrogenation desulfurization method for gasoline

Abstract

A gasoline selective hydrodesulfurization method comprises the following steps: mixing full-range gasoline and / or heave gasoline distillate with hydrogen, carrying out selective hydrodesulfurization reaction in the presence of hydrodesulfurization catalyst I and hydrodesulfurization catalyst II, and cooling and separating the resultants to obtain hydrogenated gasoline distillate, wherein the heavy gasoline distillate is obtained by cutting full-range gasoline at a cutting temperature of 50 to 75 DEG C, and the hydrodesulfurization catalyst I and hydrodesulfurization catalyst II are VIB-group metal and / or VIII-group non-noble metal catalysts loaded on aluminum and / or silica-alumina carrier. The method can be used for processing catalytic cracking gasoline to obtain gasoline product with sulfur content meeting EuroIV emission standard or even meeting EuroV emission standard, and the gasoline product has less octane number loss and RON loss less than 2.0.

Description

technical field

[0001] The invention belongs to a method for refining hydrocarbon oil in the presence of hydrogen, more specifically, a method for selective hydrodesulfurization of gasoline. Background technique

[0002] As we all know, air pollution is a serious environmental problem, and a large number of engine emissions are one of the important causes of air pollution. In recent years, in order to protect the environment, countries around the world have put forward stricter restrictions on the composition of engine fuel in order to reduce the emission of harmful substances. Among them, the restrictions on the sulfur content in gasoline are particularly severe. my country's motor gasoline standards are also gradually in line with the world. Following the implementation of Euro II emission standards nationwide on July 1, 2005, it is planned to further upgrade the quality of motor gasoline to National III standards on December 31, 2009 (equivalent to According to Euro III ...