Abstract
1. A method has been developed for the systematic determination of the group composition of sulfur compounds present in distillate fuels: mercaptans, sulfides, thiophenes, and oxygen-containing compounds. 2. A method is proposed for quantitative recovery from the fuels (without change in original composition) of oxygen-containing compounds, high-purity sulfides, and thiophenes in the form of a thiophene-aromatic concentrate. 3. These methods have been used in establishing the group composition of the sulfur compounds present in distillate fuels. It has been shown that with increasing molecular weight (boiling point) of the sulfur compounds, the relative amounts of thiophenes and oxygen-containing products increase, and the relative amount of sulfides decreases. 4. In diesel fuels and in heavy distillate fuels, disulfides are sometimes detected in quantities equivalent to the normal content of mercaptans; oxidation of mercaptans may explain the presence of disulfides.
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