超声与非超声条件下柴油氧化脱硫的对比研究

通过氧化反应与溶剂萃取分离相结合的方法对催化裂化柴油氧化脱硫。在催化氧化溶剂抽提的基础上,同时又用功率超声作用于该过程,开辟了一条全新的柴油氧化脱硫技术。考察氧化剂油比、氧化剂与催化剂的体积比、氧化温度、反应时间等因素对脱硫效果的影响。实验结果表明：在超声频率为28kHz作用下,以H2O2为氧化剂,甲酸为催化剂,萃取剂为DMF,萃取剂油比（体积比）为1：1,一次萃取20min,萃取次数为2次时氧化剂油比（体积比）为1：10,H2O2：甲酸体积比为1：1,氧化温度为50℃,反应时间为10min为最佳,其脱硫率达到93.2%。

Study on the Comparison of Oxidative Desulfurization of Diesel Fuel under the Condition of Ultrasound and Non-ultrasound

The combination process of oxidization and extraction separation was earried out tot investigating the desulfurization of FCC diesel fuels. On the basis of catalytic oxidation and solvent extraction, power uhrasound was used in this process, which developed a whole new diesel oil oxidative desulfunrization technology. The effects of ratio of oxidant to nil, volume ratio of oxidant to catalyst, oxidative temperature, reaction time on the desulfurization efficiency were studied. The results showed that under the condition of an ultrasonic frequency of 28 kHz, taking H202 as oxidant, formic acid as catalyst, DMF as extraction solvent, the volume ratio of extraction solvent to oil was 1：1, extraetion time was 20min and extract twice and the volume ratio of H2O2 to nil was 1：10, the ratio of H2O2 to formic acid was 1：1, oxidation temperature was 50% and reaction time was 10 min, the desulfurization rate reaches 93.2%.