Patent ID: 6638419
Filing Date: 2003-10-28
Classification: C10G

Abstract:
Method for obtaining oil products of the gas oil type with improved quality, from a gas oil fraction containing organosulfur compounds of the dibenzenethiophene type and/or their derivatives, with initial and final boiling points generally ranging between approximately 170 and 480Â° C., characterized by the fact that it consists of at least two steps, one, a), liquid-liquid extraction in which the gas oil fraction is put in contact with a solvent, so as to obtain a raffinate of the gas oil type with a low content of sulfur and aromatic compounds and an extract rich in solvent and with a high content of sulfur and aromatic compounds, and the other b) oxidation of extract sulfur compounds, so as to obtain, after separation, a heavy gas oil type hydrocarbon effluent with a low sulfur content, and a residue that comprises oxidized organosulfur compounds.