Abstract: A system comprising: a paraffin feed produced by the Fischer-Tropsch process is fractionable into at least three fractions: an intermediate fraction boiling between T1 and T2, T1 being in the range 120–200° C. and T2 being more than 300° C. and less than 410° C., a light fraction boiling below it and a heavy fraction boiling above it; at least a portion of the intermediate fraction is hydrotreated then at least a portion thereof is passed over an amorphous hydroisomerisation/hydrocracking catalyst; the heavy fraction is passed over an amorphous hydroisomerisation/hydrocracking catalyst with a conversion of 370° C.+ products into 370° C.? products of more than 80% by weight; the hydrocracked/hydroisomerised fractions are distilled to obtain middle distillates (kerosine, gas oil).

Abstract: The invention relates to a process for treating heavy petroleum feedstocks for producing a gas oil fraction that has a sulfur content of less than 50 ppm and most often 10 ppm that includes the following stages: a) ebulliated-bed catalytic hydrocracking, b) separation from hydrogen sulfide of a distillate fraction that includes a gas oil fraction and a heavier fraction than the gas oil, c) hydrotreatment of said distillate fraction, and d) separation of a gas oil fraction with less than 50 ppm of sulfur. Make-up hydrogen, preferably all make-up hydrogen, is to stage c). Advantageously, the heavier fraction from step (b) is subjected to catalytic cracking. The invention also relates to an installation that can be used for implementing this process.

Abstract: The invention relates to a process for preparing middle distillates from a paraffinic feedstock produced by Fischer-Tropsch synthesis, using a hydrocracking/hydroisomerization catalyst which comprises at least one hydro-dehydrogenating element chosen from the group formed by the noble elements of Group VIII of the periodic table, a silica-alumina-based non-zeolitic support containing a quantity greater than 5% by weight and less than or equal to 95% by weight of silica (SiO2), an average pore diameter, measured by mercury porosimetry, comprised between 20 and 140 ?, a total pore volume, measured by mercury porosimetry, comprised between 0.1 ml/g and 0.6 ml/g, a total pore volume, measured by nitrogen porosimetry comprised between 0.1 ml/g and 0.6 ml/g, a BET specific surface comprised between 100 and 550 m2/g, a pore volume measured by mercury porosimetry, comprised in the pores with a diameter larger than 140 ?, smaller than 0.

Abstract: The invention pertains to a catalyst that consists of a substrate made of at least one matrix and at least one zeolite that is selected from the group composed of the zeolites ZSM-48, EU-11, and ZBM-30, whereby, at the level of the zeolite, at least one noble metal of Group VIII is deposited on said substrate. The noble metal is preferably located on the outer surfaces of the zeolite crystals, and more preferable at the mouths of pores. The invention also pertains to a process for preparing the catalyst and utilizing the catalyst to treat hydrocarbon feedstocks, and especially for improving their pour points.

Abstract: A catalyst comprising at least one zeolite (molecular sieve) chosen from the group formed by the TON structure type zeolites (Theta-1, ZSM-22, ISI-1, NU-10 and KZ-2) and at least one zeolite chosen from the group formed by the zeolites (ZSM-48, EU-2, EU-11 and ZBM-30), at least one porous mineral matrix, at least one hydro-dehydrogenating element, preferably chosen from the elements of Group VIB and Group VIII of the periodic table, is used for the conversion of hydrocarbons, in particular for the reduction of the pour point of charges containing long (more than 10 carbon atoms) linear and/or slightly branched paraffins, in particular in order to convert, with a good yield, charges having high pour points to at least one cut having a low pour point and a high viscosity index for oil bases.

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: The invention relates to an improved process for the production of very high quality base oils with simultaneous production of high quality middle distillates starting from feedstocks that are obtained from the distillation of crude or that are obtained from units for transformation and refining of the latter. The process according to the invention comprises a converting pretreatment stage of the feedstock and a catalytic dewaxing stage. The converting pretreatment stage takes place in the presence of a catalyst that contains at least one noble metal that is deposited on an acid substrate that is a particular silica-alumina. The catalytic dewaxing takes place in the presence of a catalyst with a zeolite base that is preferably selected from the group that is formed by zeolites of the TON-structural type (theta-1, ISI-1, ZSM-22, KZ-2, NU-10), and the zeolites ZSM-48, ZBM-30, EU-2, EU-11, ferrierite, EU-1 and EU-13, whereby the catalyst also contains at least one hydro-dehydrogenating element.

Abstract: A catalyst comprising at least one ZBM-30 zeolite, synthesized in the presence of a particular structuring agent such as triethylenetetramine, at least one porous mineral matrix, at least one hydro-dehydrogenating element, preferably chosen from the elements of Group VIB and Group VIII of the periodic table, is used in order to improve the pour point of charges containing long (more than 10 carbon atoms) linear and/or slightly branched paraffins, in particular in order to convert, with a good yield, charges having high pour points to at least one cut having a low pour point and a high viscosity index for oil bases.

Abstract: A hydrocracking catalyst containing at least one matrix, at least one zeolite chosen from the group formed by the zeolites ZBM-30, ZSM-48, EU-2, and EU-11, at least one Y zeolite, at least one hydro-dehydrogenating metal chosen from the group formed by the metals from Group VIB and Group VIII of the periodic table, optionally at least one element chosen from the group formed by phosphorus, boron and silicon, optionally at least one element from Group VIIA, and optionally at least one element from Group VIIB is used in a process of hydrocracking/hydroconversion of hydrocarbon charges.

Abstract: Hydrocracking process for the conversion of a hydrocarbon feedstock that comprises a hydrorefining stage, in which the feedstock is brought into contact with the hydrogen in the presence of a hydrorefining catalyst at a temperature T1, a separation stage in which at least a portion of the converted products that are formed during the hydrorefining stage and a fraction that comprises the unconverted products are separated, and a hydrocracking stage in which the fraction that comprises the unconverted products is at least in part brought into contact with hydrogen in the presence of an amorphous hydrocracking catalyst that comprises a substrate, palladium and platinum, at a temperature T2 that is less than T1, whereby the difference between T1 and T2 is between 5 and 50° C., preferably between 10 and 40° C., and more preferably between 15 and 30° C.

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: Process for transforming a gas-oil fraction that makes it possible to produce a fuel that has a quality according to stringent requirements in terms of sulfur content, aromatic compound content, cetane number, boiling point, T95, of 95% of the compounds and density, d15/4, at 15° C. This process comprises a hydrorefining stage and a hydrocracking stage, whereby the latter uses a catalyst that contains at least one zeolite. The conversion of products that have a boiling point of less than 150° C. is, throughout the two stages of hydrocracking and hydrorefining, less than 40% by weight and, for the hydrorefining stage, between 1 and 15% by weight. The temperature, TR2, of the hydrocracking stage is less than the temperature, TR1, of the hydrorefining stage, and the variation between temperatures TR1 and TR2 is between 0 and 80° C.

Abstract: The invention concerns a method for simultaneously producing very high quality oil bases and high quality middle distillates comprising successive steps of hydroisomerization and catalytic dewaxing. The hydroisomerization is carried out in the presence of a catalyst containing at least a noble metal deposited on an amorphous acid support, the metal dispersion being less than 20%. The support is preferably an amorphous silica-alumina. The catalytic dewaxing is carried out in the presence of a catalyst containing at least a hydro-dehydrogenating element (group VIII) and at least a molecular sieve selected among ZBM-30, EU-2 and EU 11.

Abstract: This invention relates to silico-aluminum substrates, catalysts, and the hydrocracking and hydrotreatment processes that use them.

Abstract: The invention concerns a process for improving the pour point of a feed comprising paraffins containing more than 10 carbon atoms, in which the feed to be treated is brought into contact with a catalyst. The catalyst comprises at least one dioctahedral 2:1 phyllosilicate, preferably synthesised in a fluoride medium in the presence of the acid HF and/or a further source of fluoride anions, and preferably having an interplanar spacing of at least 20×10−10 m (2 nm) and comprising pillars based on at least one oxide of elements from groups IVB, VB, VIB, VIII, IB, IIB, IIA or IVA or any combination of these oxides, and preferably selected from the group SiO2, Al2O3, TiO2, ZrO2 and V2O5, or any combination of these latter. The catalyst further comprises at least one hydrodehydrogenating element in the metallic form. The process is carried out at a temperature 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.

Abstract: A hydrocarbon conversion catalyst contains at least one silica-alumina having the following characteristics: A content by weight of silica SiO2 of between 10 and 60% by weight; an Na content less than 300 ppm by weight; a total pore volume of between 0.5 and 1.2 m/g measured by mercury porosimetry; a porosity of said silica-alumina wherein: the volume of mesopores whose diameter is between 40 Å and 150 Å, and whose mean diameter varies between 80 and 120 Å represents between 30 and 80% of the total pore volume, and (ii) the volume of macropores, whose diameter is greater than 500 Å and preferably between 1000 Å and 10,000 Å represents between 20 and 80% of the total pore volume; a specific surface area greater than 200 m2/g, and at least one hydro-dehydrogenating element selected metals of group VIB and group VIII, and optionally phosphorus, boron, silicon, or elements of group VIIA, VIIB or VB.

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 an improved process for producing very high quality base stock and for simultaneously producing high quality middle distillates, comprising successive hydroisomerisation and catalytic dewaxing steps.

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.