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中文摘要：
以Broensted酸性离子液体N-甲基-2-吡咯烷酮磷酸二氢盐（[Hnmp]H2PO4）为萃取剂和催化剂，双氧水为氧化剂，二苯并噻吩（DBT）溶于正辛烷为模型油，利用正交实验法优化了DBT氧化脱硫反应工艺。所优化的反应条件为：反应温度60℃，模型油与离子液体体积比为1：1，氧／硫摩尔比为16，氧化时间5h；在此条件下模型油脱硫率达99．8％，实际柴油脱硫率为64．3％。由正交实验极差可知，各因素对DBT脱硫率影响的大小依次为：反应温度〉反应时间〉氧／硫摩尔比〉剂油比；离子液体循环利用6次，脱硫率下降不明显。
英文摘要：
The oxidative desulfurization of dibenzothiophene （DBT） in n-octane as model oil with Broensted acidic ionic liquids （ILs） N-methyl-pyrrolidonium phosphate （ [ Hnmp ] H2PO4 ） as catalytic solvent and H2O2 as oxidant was optimized by orthogonal experiments. 99. 8% of DBT in the model oil was removed under the optimal conditions of molar ratio of H2O2 to sulfur of 16： 1, reaction temperature of 60 ℃ , reaction time of 5 h, and volume ratio of model oil to ILs of 1 ： 1. The desulfurization efficiency of actual diesel was 64.3% under the optimized conditions. The influences of the desulfurization efficiency of DBT decreased in the following order： oxidation temperature 〉 oxidation time 〉 molar ratio of H2O2/sulfur （O/S） 〉 volume ratio of [ Hnmp] H2PO4 to model oil （VIL/Vmodel oil）, according to extreme analysis of orthogonal test. The IL[ Hnmp] H2PO4 can be recycled six times without a significant decrease in activity.
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