Abstract: Aiming at the technical and economical problems in diesel hydrodesulphurization which includes high equipment investment and operation cost, and the problems in hydro peroxide oxidation desulphurization method such as expensive oxidant, low diesel yield and sulfur containing polluted water emission, a new catalytic oxidation desulphurization method of straightrun diesel is developed to conduct pilot test research. The pilot catalyticoxidation desulphurization facility of the straightrun diesel includes oxidation unit, recover unit of the TS2 oxidation catalysis, extraction and the EA1 extractant recover unit；the reactor is the static mixingreactor；under the most desirable conditions that the apparent residence time is 3～5 minutes, the reaction temperature is 60℃, the materiel circulation is 1000L/h, the proportion of the TS2 oxidation catalysis to the diesel is 0.24, the proportion of the diesel to the EA1 extractant is 2.5∶1, the sulfur in the turnoff diesel can drop from 2273μg/g to the 106μg/g. The sulfur content in the desulfurized diesel accords with the diesel criterion of EuropeⅡ(≤300μg/g), the desulphurization rate of the straightrun diesel reaches 95.34% and the refined diesel yield 97.23%.

Key words: diesel, catalytic oxidation, desulphurization, pilot test facilities, experiment research