The oxidation–extraction desulfurization of Saudi Arabian crudes was conducted with hydrogen peroxide–acetic acid oxidation system. The selection of extractant, the optimization of oxidation–extraction conditions, and the exploration of desulfurization mechanism were studied. As DMF was used as the extractant, the optimal desulfurization rate of 35.11 % and oil recovery of 95 % were obtained at 70 °C with the molar ratio of peracetic acid to sulfur of 8:1, the molar ratio of acetic acid to hydrogen peroxide of 2:1 and the volume ratio of extractant to oil of 1:1. The desulfurization effect of different fractions in the treated Saudi Arabian crudes was found to obey the following order: gasoline–diesel fraction >VGO fraction >VR fraction, due to different types and structures of sulfur compounds. The oil quality was less affected and most sulfides were mainly extracted via DMF.

中文翻译：

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氧化萃取法对沙特阿拉伯原油进行脱硫。

沙特阿拉伯原油的氧化-萃取脱硫采用过氧化氢-乙酸氧化系统进行。研究了萃取剂的选择，氧化萃取条件的优化以及脱硫机理的探索。由于使用DMF萃取，在70°C下过乙酸与硫的摩尔比为8：1，乙酸与过氧化氢的摩尔比下，最佳脱硫率为35.11％，采油率达到95％比例为2：1，萃取剂与油的体积比为1：1。发现处理后的沙特阿拉伯原油中不同馏分的脱硫效果服从以下顺序：汽油-柴油馏分> VGO馏分> VR馏分，这是由于硫化合物的类型和结构不同所致。