Abstract: For producing basic oils and in particular very high quality oils, i.e. oils possessing a high viscosity index (VI), a low aromatics content, good UV stability and a low pour point, from oil cuts having an initial boiling point higher than 340° C., possibly with simultaneous production of middle distillates (in particular gasoils and kerosene) of very high quality, i.e. having a low aromatics content and a low pour point, the invention provides a flexible procedure for producing oils and middle distillates from a charge containing heteroatoms, i.e. containing more than 200 ppm by weight of nitrogen, and more than 500 ppm by weight of sulphur. The procedure comprises at least one hydrorefining stage, at least one stage of catalytic dewaxing on zeolite, and at least one hydrofinishing stage.

Abstract: An improved hydrocracking process of hydrocarbon charges, in two stages with an intermediate separation, in which the second-stage of hydrocracking is carried out in the presence of an added nitrogen content which is greater than 150 ppm by weight, preferably about 500 ppm by weight, and preferably in the presence of a Y zeolite catalyst, produces high yields of middle distillate.

Abstract: A process for the production of very high quality base oils optionally with simultaneous production of high quality middle distillates comprises the stages for hydrotreatment, preferably hydrocracking, on Y or beta zeolite, and atmospheric distillation. The effluent is subjected to a catalytic dewaxing on the ZSM-48 catalyst. The process then comprises a hydrofinishing stage for hydrogenating the aromatic compounds, preferably on a catalyst that comprises at least one noble metal of group VIII, chlorine and fluorine, and the stages of atmospheric and vacuum distillation. The hydrofinishing stage is conducted at a temperature lower by 20-200° C. than the catalytic dewaxing stage.

Abstract: A process for transforming a gas oil cut from a conversion process or from an aromatic crude is described, the aim of the process being to improve the cetane number of said cut. The process comprises at least one hydrogenation step in which said gas oil cut is passed, in the presence of hydrogen, over a catalyst comprising an amorphous mineral support, at least one compound of a group VIB metal, at least one compound of a non noble group VIII metal and at least phosphorous or a compound of phosphorous, the process then comprising a hydrocracking step in which the hydrogenated feed is passed, in the presence of hydrogen, over a catalyst comprising an acidic support, at least one compound of a group VIB metal and at least one compound of a non noble group VIII metal.

Abstract: A process for producing oils with high viscosity indices from oil distillates or effluents from a conversion unit comprises the following steps: a) catalytic hydrotreatment of the feed in the presence of hydrogen and a non zeolitic catalyst; b) fractionation of at least a portion of the effluent from step a) or step d) described below to an oil residue; c) fractionation by thermal diffusion of at least a portion of the oil residue obtained from step b) into oil fractions with different compositions and viscosity indices. Step b) can be preceded by a step d) for hydrocracking the effluent obtained from step a) in the presence of hydrogen and a zeolitic catalyst.

Abstract: The invention concerns a process for improving the pour point of a feed comprising paraffins containing more than 10 carbon atoms, in which process the feed to be treated is brought into contact with a catalyst comprising an EU-1 zeolite and at least one hydro-dehydrogenating element, at a temperature which is in the range 170° C. to 500° C., a pressure in the range 1 to 250 bar and an hourly space velocity in the range 0.05 to 100 h−1, in the presence of hydrogen in a proportion of 50 to 2000 l/l of feed. The oils obtained have good pour points and high viscosity indices (VI). The process is also applicable to gas oils and other feeds requiring a reduction of pour point. The invention also concerns an EU-1 zeolite from which a portion of elements T (Al, Ga, Fe or B) have been removed and which has an Si/T atomic ratio of at least 10.

Abstract: The invention concerns a process for moderate pressure hydrocracking (i.e., at a hydrogen partial pressure of more than 70 bars and at most 100 bars) with a conversion of at least 80% by volume, of a feed with a T5 temperature in the range 250° C. to 400° C. and a T95 temperature of at most 470° C. (T5 and T95 measured in accordance with ASTM-D2887), to produce a diesel with a 95% distillation point of less than 360° C., a sulphur content of at most 50 ppm and a cetane number of more than 51. The process operates with or without a recycle of the liquid effluent. Highly advantageously, it can be integrated into a refinery layout comprising catalytic cracking.

Abstract: The present invention relates to an improved hydrocracking process, of hydrocarbon charges, in two-stages with intermediate separation, in which the second-stage of hydrocracking is carried out in the presence of an added nitrogen content which is greater than 110 ppm by weight.

Abstract: The present invention concerns an improved procedure for producing basic oils and in particular very high quality oils, i.e. oils possessing a high viscosity index (VI), a low aromatics content, good UV stability and a low pour point, from oil cuts having an initial boiling point higher than 340° C., possibly with simultaneous production of middle distillates (in particular gasoils and kerosene) of very high quality, i.e. having a low aromatics content and a low pour point.

Abstract: The invention concerns a process for improving tde pour point of a feed comprising paraffins containing more than 10 carbon atoms, in which process the feed to be treated is brought into contact with a catalyst comprising an EU-1 zeolite and at least one hydro-dehydrogenating element, at a temperature which is in the range 170° C. to 500° C., a pressure in the range 1 to 250 bar and an hourly space velocity in the range 0.05 to 100 h−1, in the presence of hydrogen in a proportion of 50 to 2000 l/l of feed. The oils obtained have good pour points and high viscosity indices (VI). The process is also applicable to gas oils and other feeds requiring a reduction of pour point. The invention also concerns an EU-1 zeolite from which a portion of elements T (Al, Ga, Fe or B) have been removed and which has an Si/T atomic ratio of at least 10.

Abstract: The invention concerns an improved method for making very high quality oil bases optionally with simultaneous production of high quality middle distillates, comprising hydrotreating, hydrocracking preferably on Y or beta zeolite, topping steps. The effluent is subjected to catalytic dewaxing on ZSM-48 zeolite. The method then comprises steps of hydrofinishing to hydrogenate the aromatics, preferably on a catalyst comprising at least a noble metal of group VIII, chlorine and fluorine and steps of vacuum topping. The properties of the oils and middle distillates are enhanced (flow point, viscosity index, aromatic content) resulting even in production of medicinal oils.

Abstract: The present invention relates to a process for improving the pour point of a feed including paraffins containing more than 10 carbon atoms. Desirably, the feed to be treated is brought into contact with a catalyst based on NU-85 zeolite, at least partially in its acid form, and at least one hydro-dehydrogenating element, at a temperature which is in the range 170° C. to 500° C., a pressure in the range 1 to 250 bar and at an hourly space velocity in the range 0.05 to 100 h−1, in the presence of hydrogen in a proportion of 50 to 2000 l/l of feed.

Abstract: A hydrotreatment process is carried out in at least two steps to hydrotreat a heavy hydrocarbon fraction containing asphaltenes, sulphur-containing impurities and metallic impurities, comprising a first hydrodemetallization step and a subsequent second hydrodesulphurization step, in which the hydrodemetallization step comprises one or more hydrodemetallization zones with fixed beds preceded by at least two hydrodemetallization guard zones (A) and (B), also with fixed beds, disposed in series for cyclic use consisting of successive repetition of steps b) and c) defined below.

Abstract: Process for converting a hydrocarbon fraction that is obtained from atmospheric distillation of a crude, comprising a vacuum distillation stage (a) of said feedstock that makes it possible to obtain a vacuum distillate and a vacuum residue; a stage b) for treating at least a portion of the vacuum distillate in the presence of hydrogen; a stage c) for treating at least a portion of the vacuum residue in the presence of hydrogen, whereby said stages b) and c) are each carried out in at least one separate triphase reactor that contains at least one ebullated-bed hydrotreatment catalyst that operates with an upward flow of liquid and gas; a stage d) in which at least a portion of the product that is obtained in stage b) is sent to an atmospheric distillation zone from which a light fraction and a heavier liquid fraction are recovered; a stage e) in which at least a portion of the product that is obtained in stage c) is sent to an atmospheric distillation zone from which a light fraction and a heavier liquid fract

Abstract: Process for converting a hydrocarbon fraction that is obtained from atmospheric distillation of a crude, comprising a vacuum distillation stage (a) of said feedstock that makes it possible to obtain a vacuum distillate and a vacuum residue; a stage b) for treating at least a portion of the vacuum distillate in the presence of hydrogen in at least one reactor that contains at least one fixed-bed hydrotreatment catalyst under conditions that make it possible to obtain a liquid effluent with a low sulfur content; a stage c) for treating at least a portion of the vacuum residue in the presence of hydrogen in at least one triphase reactor that contains at least one ebullated-bed hydrotreatment catalyst; a stage d) in which at least a portion of the product that is obtained in stage b) is sent to an atmospheric distillation zone from which a light fraction and a heavier liquid fraction are recovered; a stage e) in which at least a portion of the product that is obtained in stage c) is sent to an atmospheric distill

Abstract: A process for the conversion of a hydrocarbon fraction comprising a step a) for treating a hydrocarbon charge in the presence of hydrogen in at least one reactor containing at least one hydrodesulphurisation catalyst in a fixed bed under conditions that make it possible to obtain a liquid effluent with a reduced sulphur content, a step b) for treating at least a part of the liquid effluent originating from step a) in the presence of hydrogen in at least one three-phase reactor, containing at least one hydrotreatment catalyst in a boiling bed, operating with an ascending stream of liquid and gas, said reactor comprising at least one means of withdrawing the catalyst from said reactor situated near the bottom of the reactor and at least one means of making up fresh catalyst in said reactor situated near the top of said reactor, and a step c) in which at least part of the product obtained in step b) is passed to a distillation zone from which are recovered a gas fraction, a motor fuel fraction of the petrol type

Abstract: The invention concerns a process for improving the pour point of a feed comprising paraffins containing more than 10 carbon atoms, in which process the feed to be treated is brought into contact with a catalyst comprising NU-85 zeolite and at least one hydro-dehydrogenating element, at a temperature which is in the range 170.degree. C. to 500.degree. C., a pressure in the range 1 to 250 bar and an hourly space velocity in the range 0.05 to 100 h.sup.-1, in the presence of hydrogen in a proportion of 50 to 2000 l/l of feed. The oils obtained have good pour points and high viscosity indices (VI). The process is also applicable to gas oils and other feeds requiring a reduction of pour point. The invention also concerns a NU-85 zeolite from which a portion of elements T (Al, Ga, Fe or B) have been removed and which has an Si/T atomic ratio of at least 18.

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 invention concerns a process for improving the pour point of a feed comprising paraffins containing more than 10 carbon atoms, in which process the feed to be treated is brought into contact with a catalyst comprising an NU-87 zeolite comprising silicon and at least one clement T selected from the group formed by Al, Fe, Ga and B, from which at least a portion of clement T has been removed, and having a global Si/T ratio of over 20, the catalyst also containing at least one hydro-dehydrogenating element. The process is carried out at a temperature which is in the range 170.degree. C. to 500.degree. C., a pressure in the range 1 to 250 bar and at an hourly space velocity in the range 0.05 to 100 h.sup.-1, in the presence of hydrogen in a proportion of 50 to 2000 l/l of feed. The oils obtained have good pour points and high viscosity indices (VI). The process is also applicable to gas oils and other feeds requiring a reduction of pour point. The catalyst is also claimed.

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.