Abstract: Three kinds of molybdenum polyoxometalates using Mo8O4-26 as the anion, quaternary ammonium salts as the cation have been synthesized. And the catalysts were used in the catalysis and oxidation desulfurization of diesel fuel system with oxidant Ｈ2O2 (30%) as oxidant and extractant ［C6MIM］BF4 as extraction agent. The desulfurization of model diesel fuel was optimized by investigating different reaction conditions, such as the dosage of catalysts, reaction temperature, the ratio of ［C6MIM］BF4 and diesel fuel ,reaction time, the dosage of oxidant and so on and were applied in real diesel fuel. The results showed that the best desulfurization rate at 60 ℃ was obtained after 1 h [KG*4]under [KG*4]the [KG*4]condition of n(catalyst)/n(sulfide)=5%,V(［C6MIM］BF4)/V(oil)=1∶5，n(oxidant)/n(sulfide)=6∶1.The desulfurization rate reached 95% for the model diesel fuel (［S］o=1 164 μg/g) and 92% for the FCC diesel(［S］o=850 μg/g).

Key words: Molybdenum polyoxometalates,    ,  Extraction,    ,  Oxidation desulfurization

摘要： 通过复分解法合成了3种基于 Mo 8O4- 2 6 阴离子的四烷基铵钼多金属氧酸盐, 并将其作为催化剂, 质量 分数为3 0%H2O2 溶液为氧化剂、 1 - 己基 - 3 - 甲基咪唑四氟硼酸盐离子液体( [ C 6M I M] B F 4) 为萃取剂, 用于柴油的催 化氧化脱硫。分别考察了催化剂摩尔分数、 反应温度、 剂油体积比、 反应时间、 氧化剂用量等条件对模拟油品脱硫率 的影响, 确定了最优化反应条件, 并将其应用于实际油品的脱硫中。结果表明, 在6 0℃反应条件下, 反应时间1h, 当 催化剂摩尔分数为5%、 剂油体积比为1∶5、 n( 氧化剂) / n( 硫化物) 为6∶1时, 该催化氧化 - 萃取体系对模拟油品( 初 始含硫质量分数为11 6 4μ g / g) 有较高的脱硫率, 一次脱硫率可达9 5%以上。对抚顺石化公司生产的催化裂化柴油 ( 初始含硫质量分数为8 5 0μ g / g) 一次脱硫率约为9 2%。

关键词: 钼多金属氧酸盐,    ,  萃取,   ,  氧化脱硫