Abstract: Adopting the straight run diesel catalytic oxidation desulphurization pilot facility and under the condition that the reactor is the static state one, the apparent time is 3～5 minutes, the reaction temperature is 60℃, the materiel circulation is 1000L/h, the ratio of the TS2 oxidation catalysis to the diesel is 0.24, the ratio of the diesel to the EA1 extractant is 2.5∶1, the pilot test of straightrun diesel is conducted for catalyzingoxidate desulphurization. The production analysis and the qualification indicate that at the aforesaid condition, the main dibenzothiophene sulfide in the diesel are moved out; mixing the sulfide enriched diesel with the catalytic diesel with the volume rate of one to ten and at the simulation conditions of the diesel hydrodesulphurization operation in the Lanzhou refinery, the sulfide in the sulfideenriched diesel declines to 800μg/g from 2500μg/g。The sulfideenriched diesel can be used as the raw material of the catalytic cracking diesel′s hydrogenization facility.

Key words: diesel, catalytic oxidation, desulphurization, analysis and test, hydrodesulphurization