Method for removing dibenzothiophene contained in fuel oil through catalytic oxidation

The invention discloses a method for removing dibenzothiophene contained in fuel oil through catalytic oxidation, and belongs to the technical field of chemical engineering. According to the invention, the deep removal of the dibenzothiophene contained in the fuel oil is realized by taking binuclear metal phthalocyanine as a catalyst, ionic liquid as an extracting agent and air as an oxidizing agent and adopting a catalytic oxidation extraction coupling method at the mole ratio of sulfur to a catalyst to an extracting agent to an oxidizing agent of 1:(0.00015-0.0015):(0.45-0.85):(2.067-20.67). The method disclosed by the invention has the advantages of moderate reaction condition, small catalyst usage amount and high catalytic activity. According to the invention, the ionic liquid extracting agent is low in cost, and can realize the automatic layering with a reaction system after the reaction is finished, so that the binuclear metal phthalocyanine catalyst coupling ionic liquid has good recycling. The method