Abstract: A process for hydrotreating a hydrocarbon feed, comprising subjecting said feed to hydrotreating conditions in the presence of a catalyst comprising an essentially alumina-based extruded support, essentially constituted by a plurality of juxtaposed agglomerates, optionally at least one catalytic metal or a compound of a catalytic metal from group VIB (group 6 of the new periodic table notation) and/or optionally, at least one catalytic metal or a compound of a catalytic metal from group VIII (group 8, 9 and 10 of the new periodic table notation), in which the sum S of the group VIB and VIII metals, expressed as the oxides, is 0% to 50% by weight, and wherein each of these agglomerates is partly in the form of packs of flakes and partly in the form of needles, said needles being uniformly dispersed both about the packs of flakes and between the flakes, in which the alumina agglomerates are obtained by forming a starting alumina originating from rapid dehydration of hydrargillite and in which the amount of alum

Abstract: A process for converting a heavy hydrocarbon fraction comprises a step a) for treating a hydrocarbon feed in a hydroconversion section in the presence of hydrogen, the section comprising at least one three-phase reactor containing at least one ebullated bed of hydroconversion catalyst operating in riser mode for liquid and for gas, said reactor comprising at least one means for extracting used catalyst from said reactor and at least one means for adding fresh catalyst to said reactor, b) a step for treating fresh catalyst and conditioning the catalyst using a process leading to a gain in the activity of the catalyst during treatment of the feed in said conversion reactor. This process for conditioning the catalyst before adding it to the reactor can comprise a step for impregnating the catalyst with a chemical substance, or a complete sulphurisation step, or a step for adding an additive mixed with the fresh catalyst which is added.

Abstract: The invention concerns a petroleum product and a process for the production of a petroleum product which can form part of a blend for an internal combustion engine fuel, the process comprisinga) hydrotreating a hydrocarbon feedstock at a partial pressure of hydrogen at the reactor outlet of about 0.5 MPa to about 6 MPa,b) separating a product (P) from step a) into a product (P1) with a final boiling point of about 300.degree. C. and a product (P2) with an initial boiling point greater than the final boiling point of product (P1),c) performing a liquid-liquid extraction with a solvent (S1), to produce an extract (E1) and a raffinate (R1) from product (P2),d) recovering solvent (S1) from raffinate (R1) to produce a product (Q1), depleted in solvent (S1), which has improved qualities and contains less than 500 ppm by weight of sulphur.

Abstract: A process for converting a hydrocarbon fraction comprises a step a) for treating a hydrocarbon feed in the presence of hydrogen in at least one three-phase reactor, containing at least one hydrotreatment catalyst in an ebullating bed, operating in riser mode of liquid and of gas, the reactor comprising at least one means located close to the bottom of the reactor for extracting catalyst from the reactor and at least one means located close to the top of the reactor for adding fresh catalyst to the reactor, a step b) for treating at least a portion of the effluent from step a) in the presence of hydrogen in at least one reactor containing at least one hydrocracking catalyst in a fixed bed under conditions for producing an effluent with a reduced sulphur content, and a step c) in which at least a portion of the product from step b) is sent to a distillation zone from which a gaseous fraction, a gasoline type engine fuel fraction, a diesel type engine fuel fraction and a liquid fraction which is heavier than the

Abstract: The present invention relates to the use of a catalyst comprising an extruded essentially alumina-based support, constituted by a plurality of juxtaposed agglomerates and partially in the form of packs of flakes and partially in the form of needles, and optionally comprising at least one catalytic metal or a compound of a catalytic metal from group VIB, and/or optionally at least one catalytic metal or compound of a catalytic metal from group VIII, in an ebullating bed process and for hydrorefining and hydroconverting hydrocarbon feeds.

Abstract: A process for converting a heavy hydrocarbon fraction comprises treating the hydrocarbon feed in a hydrodemetallization section, the section containing at least one fixed bed hydrodemetallization catalyst.

Abstract: The present invention relates to a catalyst comprising an extruded essentially alumina-based support, constituted by a plurality of juxtaposed agglomerates and partially in the form of packs of flakes and partially in the form of needles, and optionally comprising at least one catalytic metal or a compound of a catalytic metal from group VIB, and/or optionally at least one catalytic metal or compound of a catalytic metal from group VIII. The invention also relates to its use in a fixed bed reactor, for hydrorefining and hydroconverting hydrocarbon feeds.

Abstract: A process for transforming a gas oil cut into a dearomatized fuel with a high cetane number comprises at least one first, deep desulphurization and deep denitrogenation step in which the gas oil cut and hydrogen are passed over a catalyst comprising a mineral support, at least one group VIB metal or metal compound, at least one group VIII metal or metal compound, and phosphorous or at least one phosphorous compound, and at least one subsequent second step, dearomatization, in which the desulphurized and denitrogenated product from the first step is passed with hydrogen over a catalyst comprising a mineral support and at least one group VIII noble metal or noble metal compound.

Abstract: A process for converting a heavy hydrocarbon fraction comprises treating the hydrocarbon feed in a hydroconversion section in the presence of hydrogen, the section comprising at least one three-phase reactor containing at least one ebullated bed hydroconversion catalyst, operating in liquid and gas riser mode, said reactor comprising at least one means for removing catalyst from said reactor and at least one means for adding fresh catalyst to said reactor.

Abstract: A process for converting a heavy hydrocarbon fraction comprises treating the hydrocarbon feed in a hydrodemetallization section, the section comprising at least one fixed bed hydrodemetallization catalyst.

Abstract: A process for converting a heavy hydrocarbon fraction comprises treating the hydrocarbon feed in a hydroconversion section in the presence of hydrogen, the section comprising at least one three-phase reactor containing at least one ebullated bed hydroconversion catalyst, operating in liquid and gas riser mode, said reactor comprising at least one means for removing catalyst from said reactor and at least one means for adding fresh catalyst to said reactor.

Abstract: Intensive hydrofining of petroleum fractions wherein an at least partly together with hydrogen circulate in a given direction, in at least one reactor containing at least one fixed bed of a hydrofining catalyst in solid form, is characterized in that the reactor is equipped with at least one inlet pipe for the mixture of the petroleum fraction and hydrogen and at least one outlet pipe for the resultant hydrofined petroleum fraction, and that at least one static mixer is positioned upstream from said outlet of the hydrofined petroleum fraction.

Abstract: The invention concerns a petroleum product and a process for the production of a petroleum product which can form part of a blend for an internal combustion engine fuel, the process comprisinga) hydrotreating a hydrocarbon feedstock at a partial pressure of hydrogen at the reactor outlet of about 0.5 MPa to about 6 MPa,b) separating a product (P) from step a) into a product (P1) with a final boiling point of about 300.degree. C. and a product (P2) with an initial boiling point greater than the final boiling point of product (P1),c) performing a liquid-liquid extraction with a solvent (S1), to produce an extract (E1) and a raffinate (R1) from product (P2),d) recovering solvent (S1) from raffinate (R1) to produce a product (Q1), depleted in solvent (S1), which has improved qualities and contains less than 500 ppm by weight of sulphur.

Abstract: The invention relates to a process for synthesizing mainly linear and saturated hydrocarbons containing at least 80% by weight of C.sub.5 + hydrocarbons in relation to all of the hydrocarbons formed, from a synthesis gas CO--(CO.sub.2)--H.sub.2, the synthesis gas being converted into hydrocarbons under a total pressure ranging between 0.1 and 15 MPa, the temperature ranging between 150.degree. and 350.degree. C., the hourly space velocity ranging between 100 and 30,000 volumes of synthesis gas per volume of catalyst and per hour, and the H.sub.2 /CO molar ratio in the synthesis gas ranging between 1:2 and 5:1, said process being characterized in that it is carried out in a reaction zone with an ebullating catalytic bed in the presence of a catalyst comprising at least one metal from group VIII, and in the presence of a liquid phase.

Abstract: A fuel for internal combustion engines having an improved cetane index and lower sulfur content is obtained from a hydrocarbon charge, by a process comprising a step (a) for distillation (D1) in which a bottom product (Q1) is obtained via a line 3 and in which a top product (T1) is obtained via a line 2, a step (b) of liquid/liquid extraction (LE) using a solvent (S1) to obtain a raffinate (R1), (line 5) an extract from which product (Q1) is obtained (line 6), a step c) separating (D2) the raffinate (R1) enabling a product (Q2) to be obtained via line 7, which product has a low solvent (S1) content, and a step (d) of hydrotreatment (HDS) in which the mixture of the products (T1) and (Q2) are subjected to hydrotreatment with a hydrogen partial pressure of less than 10 megapascals, to obtain a product (P) (line 9) which has improved qualities and which contains less than 500 ppm by weight sulphur.

Abstract: A process for obtaining a fuel for internal combustion engines from a hydrocarbon charge, comprising a step (a) for distillation (D1) in which a bottom product (Q1) is obtained via a line 3 and in which a top product (T1) is obtained via a line 2, a step (b) of liquid/liquid extraction (LE) using a solvent (S1) to obtain a raffinate to (R1), (line 5) and an extract from which product (Q1) an extract (E1) is obtained (line 6) and a raffinate, a step c) of separating (D2) the raffinate (R1) enabling a product (Q2) to be obtained via line 7, which product has a low solvent (S1) content, and a step (d) of hydrotreatment (HDS) in which the mixture of the products (T1) and (Q2) are subjected to hydrotreatment with a hydrogen partial pressure of less than 10 megapascals, to obtain a product (P) (line 9) which has improved qualities and which contains less than 500 ppm by weight sulphur.

Abstract: The invention involves the liquid phase hydroconversion of hydrocarbon charges containing heavy fractions, and more particularly their deep conversion, in which the charge is contacted with a dispersed catalyst in the presence of a polyaromatic additive. The catalyst is a sulfide of a hydrogenating metal (such as molybdenum, nickel or cobalt) generated in situ from a precursor. The additive has at least three aromatic cycles, has a boiling point exceeding 300.degree. C., and is added at a rate of 5 to 60% by weight based on the charge. Synergism between the catalyst and the additive makes it possible to reduce the catalyst quantity and/or improve the conversion and quality of the products.

Abstract: Process for the treatment of a hydrocarbon fraction containing metals and comprising the following stages: (a) the said hydrocarbon fraction is treated in the presence of mean density particles (d.sub.o) under conditions for eliminating at least partly the metals contained therein and deposits of said metals on at least one fraction of said solid particles; (b) at least part of the solid particles from stage (a), whose mean density is (d.sub.i) is drawn off; (c) said solid particles from stage (b) are magnetohydrostatically separated by introducing said solid particles into a ferrofluid placed in a non-uniform magnetic field and creating a vertical magnetic field, whose intensity is adjusted in such a way that the apparent mean density (d.sub.af) of the ferrofluid permits the separation of said solid particles into at least one mean density fraction (d.sub.i) below said apparent mean density (d.sub.af) of the ferrofluid and into at least one mean density fraction (d.sub.s) above said mean apparent density (d.

Abstract: Process for deasphalting a hydrocarbon charge by means of a deasphalting solvent.The charge (1) is introduced, at 100.degree.-200.degree. C., in admixture with a deasphalting solvent (3and 4), into a settler (7). The deasphalted oil (24) is separated from the solvent (23). Asphalt (9) is washed in a column and then separated from the washing liquid (21).