Abstract: A process for producing middle distillates and naphtha from a mixed feedstock containing a heavy fraction of hydrocarbons of fossil origin, of which at least 50% by weight of the compounds have an initial boiling point greater than 300° C. and a final boiling point less than 700° C., and less than 50% by weight is a fraction of plastic and/or tire and/or solid recovered fuel pyrolysis oil with a paraffinic and olefinic compound content greater than 60% by weight, the process including: a) hydrotreating the mixed feedstock in order to obtain a hydrotreated effluent; b) hydrocracking the hydrotreated effluent in order to obtain a hydrocracked effluent; c) separating hydrocracked effluent in order to produce at least one gaseous effluent comprising hydrogen and at least one liquid effluent; d) fractionation in order to produce a naphtha cut and a middle distillate cut.

Abstract: A process for producing middle distillates and naphtha from a mixed feedstock comprising a heavy fraction of hydrocarbons of fossil origin, and less than 50% by weight is a fraction of plastic and/or tire and/or solid recovered fuel pyrolysis oil, comprises: a) hydrotreating the mixed feedstock in order to obtain a hydrotreated effluent; b) hydrocracking the hydrotreated effluent in order to obtain a hydrocracked effluent; c) separating hydrocracked effluent in order to produce at least one gaseous effluent comprising hydrogen and at least one liquid effluent; and d) a fractionation step in order to produce a naphtha cut and a middle distillate cut.

Abstract: A method of determining physico-chemical properties of a petroleum sample from two-dimensional gas chromatography. The amounts of molecular compounds present in the sample are determined by means of two-dimensional gas chromatography. At least one physical property, such as the octane number, is then determined from these amounts. A previously calibrated relation connecting the physical property to the amounts is used to this end.

Abstract: The Invention is a method for quantitative analysis of a mixture of molecular compounds by two-dimensional gas chromatography having application for quantitative analysis of products from the chemical or petroleum industry. A two-dimensional gas chromatography is carried out, during which a chromatographic signal is recorded. A chromatogram in two dimensions on which chromatographic peaks form spots is generated from the signal. These spots are defined by means of polygons. Then, for each polygon, chromatographic signal portions contained between two intersections of the polygon with columns of the chromatogram are extracted. Start and end times are defined for the chromatographic peaks present in these portions and the polygon is adjusted by shifting its intersection points according to the start and end times of the chromatographic peaks. Finally, molecular compound amounts are determined by calculating the surface area of the polygons thus adjusted.