Abstract: The oxidative desulfurization performance on model oil with thiophene was investigated with ionic liquid FeCl3/BmimCl and Schiff-base cobalt complex CoL and oxygen as the desulfurization system. Thiophene removal rate could reach 96% under the optimum condition，in which model oil dosage was 25mL，mole ratio of FeCl3/BmimCl was 1∶1 and its dosage was 8 mL，oxygen flow rate was 50 mL/min，reaction temperature was 62℃，CoL dosage was 0.13g，reaction time was 6h. The final thiophene content in the desulfurized model oil could be less than 50μg/g，and the oxidation product of thiophene was SO42?. The ionic liquid FeCl3/BmimCl could be recycled 4 times without significant decrease in desulfurization capability. The oxidative desulfurization rate of diesel oil could reach 100% with the above desulfurization system，which had good application prospect.

Key words: Ionic liquids, Schiff-base, cobalt complex, oxidation, desulfurization, ionic liquids, Schiff-base, Cobalt complex, oxidation, desulfurization

摘要： 将离子液体FeCl3/BmimCl与Schiff碱Co络合物CoL组成催化体系，以氧气为氧化剂，噻吩的正辛烷溶液为模拟油，考察该脱硫体系脱除模拟油中噻吩硫的性能。结果表明，最佳脱硫条件为：模拟油25mL；IL-FeCl3/BmimCl摩尔比为1，8mL；O250mL/min；反应温度62℃；CoL0.13g；时间6h，最终脱硫率可达96%（质量分数），脱硫后油品中噻吩含量最终可降到50μg/g以下。噻吩的氧化产物为SO42-离子。离子液体再生4次后脱硫性能开始下降。该脱硫体系对实际柴油中的噻吩硫催化氧化脱硫效果可达100%，该脱硫体系具有实际应用意义。

关键词: 离子液体, Schiff碱, Co络合物, 氧化, 脱硫, 离子液体, Schiff碱, Co络合物, 氧化, 脱硫