Abstract: Catalytic oxidation is a non-HDS technology to remove sulfur compounds from diesel fuel. On the basis of catalytic oxidation and solvent extraction, ultrasound irradiation was introduced to provide energy for the reaction， which developed a completely new diesel oil oxidative desulfurization technology. The sulfides in Liaohe straight-run diesel fuel had been oxidized to sulfones with H2O2-formic acid as oxidant system was used in the process, the effects of reaction temperature, time and volumic ratio of oxidant and oil were investigated. The results show：under the condition of an ultrasonic frequency of 28 kHz|ultrasonic power of 200 W|the volumic ratio of H2O2 to formic acid 1∶1|extraction solvents N, N-dimethylformamide (DMF)|an extraction time of 10 min and the volumic ratio of extraction solvent to oil is 1∶2, its proper conditions are as follows: volumic ratio of oxidant to oil is 1∶10|reaction temperature is 50 ℃|oxidation time is 10 min|the rate of desulfurization is 87.8%.

Key words: Diesel, Oxidative desulfurization, Ultrasound

摘要： 催化氧化脱硫是降低柴油硫含量的非加氢脱硫工艺，在催化氧化溶剂抽提的基础上，增加超声波为反应提供能量。采用H2O2-甲酸作为氧化剂将辽河直馏柴油中的硫化物氧化成相应的砜，考察了氧化反应时间、温度、剂油体积比对脱硫效果的影响。实验结果表明，在超声频率为28 kHz,超声功率为200 W，H2O2和甲酸体积比为1∶1，萃取剂为N，N-二甲基甲酰胺（DMF），一次萃取10 min，萃取剂与油体积比为1∶2的条件下，反应氧化剂与油的体积比为1∶10，温度为50 ℃，氧化反应时间为10 min为较适宜的条件，其脱硫率达到87.8%。

关键词: 柴油, 氧化脱硫, 超声波