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 catalyst comprising 0.1-99.7% by weight of at least one alumina matrix; 0.1-80% by weight of at least one globally non dealuminated Y zeolite with a lattice parameter of more than 2.438 nm, a global SiO2/Al2O3 mole ratio of less than 8, and a framework SiO2/Al2O3 mole ratio of less than 21 and more than the global SiO2/Al2O3 mole ratio; 0.1-30% by weight of at least one group VIII metal and/or 1-40% by weight of at least one group VIB metal (% oxide); 0.1-20% by weight of at least one promoter element selected from the group formed by boron and silicon (% oxide); 0-20% by weight of at least one group VIIA element; 0-20% by weight of phosphorous (% oxide); 0.1-20% by weight of at least one group VIIB element, useful for hydrocracking processes, especially at low pressures of 7.5 to 11 MPa.

Abstract: The invention concerns a catalyst comprising at least one matrix, at least one dioctahedral 2:1 phyllosilicate which is optionally synthesised in a fluorine-containing medium and optionally bridged, at least one metal selected from elements from group VIB and/or group VIII of the periodic table, boron and/or silicon, optionally phosphorous, optionally at least one group VIIA element, and optionally at least one group VIIB element. The invention also concerns the use of the catalyst for hydrocracking hydrocarbon-containing feeds.

Abstract: A catalyst comprising 0.1-99.7% by weight of at least one alumina matrix; 0.1-80% by weight of at least one globally non dealuminated Y zeolite with a lattice parameter of more than 2.438 nm, a global SiO2/Al2O3 mole ratio of less than 8, and a framework SiO2/Al2O3 mole ratio of less than 21 and more than the global SiO2/Al2O3 mole ratio; 0.1-30% by weight of at least one group VIII metal and/or 1-40% by weight of at least one group VIB metal (% oxide); 0.1-20% by weight of at least one promoter element selected from the group formed by boron and silicon (% oxide); 0-20% by weight of at least one group VIIA element; 0-20% by weight of phosphorous (% oxide); 0.1-20% by weight of at least one group VIIB element, useful for hydrocracking processes, especially at low pressures of 7.5 to 11 MPa.

Abstract: The invention provides a process for hydrocracking hydrocarbon-containing petroleum feeds in the presence of a catalyst comprising a support containing at least one matrix, and at least one zeolite selected from the group, formed by NU-85, NU-86 and NU-87 zeolites.

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 catalyst comprising 0.1-99.7% by weight of at least one alumina matrix; 0.1-80% by weight of at least one globally non dealuminated Y zeolite with a lattice parameter of more than 2.438 nm, a global SiO2/Al2O3 mole ratio of less than 8, and a framework SiO2/Al2O3 mole ratio of less than 21 and more than the global SiO2/Al2O3 mole ratio; 0.1-30% by weight of at least one group VIII metal and/or 1-40% by weight of at least one group VIB metal (% oxide); 0.1-20% by weight of at least one promoter element selected from the group formed by boron and silicon (% oxide); 0-20% by weight of at least one group VIIA element; 0-20% by weight of phosphorous (% oxide); 0.1-20% by weight of at least one group VIIB element, useful for hydrocracking processes, especially at low pressures of 7.5 to 11 MPa.

Abstract: The invention concerns an alumina based catalyst containing, expressed as the oxide content by weight, 2-10% by weight of cobalt oxide CoO, 10-30% by weight of molybdenum oxide MoO3 and 4-10% of phosphorous oxide P2O5, with a BET surface area in the range 100-300 m2/g, a crushing strength CSH of more than 1.4 MPa, and an average pore diameter in the range 8-11 nm, the pore volume of pores with diameter of more than 14 nm being less than 0.08 ml/g, or less than 22% of total pore volume, the volume of pores with a diameter of less than 8 nm being at most 0.05 ml/g, or less than 10% of total pore volume, the volume of pores with diameter less than 10 nm being in the range of 20%-70%, the volume of pores with diameter between 10 nm and 13 nm being in the range of 20%-60%, and the volume of pores with a diameter which is in the range 8 to 14 nm being in the range 0.20 ml/g to 0.8 ml/g. The invention also concerns a hydrotreatment process using the catalyst, in particular hydrodesulphuration.

Abstract: A process for transforming a gas oil cut into a dearomatised fuel with a high cetane number comprises at least one first, deep desulphurisation 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, dearomatisation, in which the desulphurised 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 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 comprising at least one zeolite with structure type MTT, TON or FER or any possible combination of these three, at least one hydro-dehydrogenating element selected from elements from group VIB and group VIII of the periodic table, at least one deposited promoter element (boron, silicon, phosphorous), optionally at least one group VIIA element, optionally at least one group VIIB element, at a temperature in the range 170° C. to 500° C., a pressure in the range 1 to 250 bars and at an hourly space velocity in the range 0.05 to 100 h−1, in the presence of hydrogen in an amount 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 in pour point.

Abstract: The invention concerns a catalyst comprising at least one matrix, at least one dioctahedral 2:1 phyllosilicate which is optionally synthesized in a fluorine-containing medium and optionally bridged, at least one metal selected from elements from group VIB and/or group VIII of the periodic table, boron and/or silicon, optionally phosphorous, optionally at least one group VIIA element, and optionally at least one group VIIB element. The invention also concerns the use of the catalyst for hydrocracking hydrocarbon-containing feeds.

Abstract: A process for transforming a gas oil cut into a dearomatised fuel with a high cetane number comprises at least one first, deep desulphurisation 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, dearomatisation, in which the desulphurised 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: The invention concerns a process for selective hydroisomerization of compounds with an n-alkane chain containing more than 10 carbon atoms, in which the compound to be treated is brought into contact with a catalyst comprising at least one hydro-dehydrogenating element and at least one molecular sieve having a one- or two-dimensional pore network, the accessible pore openings of which are delimited by 10 oxygen atoms, and a distance termed the bridging distance between the pores of less then 0.70 nm, and the zeolite is such that a catalyst which undergoes a standard n-heptadecane isomerization test has, for a conversion of 95%, a selectivity of at least 70% for isomerized products, and the catalyst contains at least 5% by weight of at least one hydro-dehydrogenating element selected from the group formed by non noble GVIII metals, GVIB metals, and niobium, and the catalyst preferably contains phosphorous. The sieve is preferably a NU-10, NU-23, NU-87, EU-13 or Theta-1 zeolite.

Abstract: The invention relates to a hydrocracking catalyst that contains at least one metal of group VIB, and/or at least one metal of group VIII of the periodic table, an alumina matrix, phosphorus, optionally at least one element from group VIIA (fluorine), and a zeolite Y that is not fully dealuminificated, with a crystalline parameter that is greater than 2,438 nm, an overall SiO2/Al2O3 ratio that is less than 8, and a framework SiO2/Al2O3 ratio that is less than 21 and greater than the overall SiO2/Al2O3 ratio. The invention also relates to a process for hydrocracking with this catalyst, in particular at low pressure of 7.5 to 11 MPa.

Abstract: Useful for example, for the hydrocracking of hydrocarbons is a catalyst comprising a matrix, at least one Y zeolite which is dealuminated and has a lattice parameter in the range 2.424 nm to 2.455 nm, a global SiO2/Al2O3 mole ratio is more than 8, the quantity of alkaline-earth metal cations or alkali metal cations and/or rare earth metal cations is such that the atomic ratio (n×Mn+)/Al is less than 0.8, the specific surface area, determined using the BET method, is more than 400 m2/g, and the water adsorption capacity is more than 6% by weight for P/P0 =0.2 at 25° C., said catalyst also comprising silicon deposited on the 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 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: The invention relates to dioctahedral phyllosilicates 2:1 whose basal spacing is at least equal to 2.0.times.10.sup.-9 m and which in the interlayer space comprise pillars based on at least one of the compounds that is selected from the group that is formed by SiO.sub.2, Al.sub.2 O.sub.3, TiO.sub.2, ZrO.sub.2, V.sub.2 O.sub.5, or any combination of the latter. Preferably, they contain fluorine. The invention also relates to a process for their preparation that includes treatment with a surfactant, followed by treatment with a primary or secondary amine and at least one alkoxide of an element that is selected from the group that is formed by the elements Si, Al, Zr, Ti and V. The invention also relates to a catalyst that comprises said phyllosilicate, at least one matrix, and optionally a zeolite Y. The invention also relates to a process for converting hydrocarbons with this catalyst, and in particular a hydrocracking process.

Abstract: An NU-88 zeolite and a hydrocracking catalyst comprising at least one matrix, a NU-88 zeolite, at least one group VIB or VII metal, a phosphorous, boron or silicon promoter, optionally at least one group VIIA element, and optionally at least one group VIIB element, and also the use of the catalyst for hydrocracking hydrocarbon feeds.

Abstract: The invention provides a hydrocracking catalyst comprising at least one matrix, a zeolite selected from the group formed by NU-85, NU-86 and NU-87 zeolites, at least one metal selected from the group formed by metals from group VIB and VIII of the periodic table, at least one element selected from the group formed by boron and silicon, optionally phosphorous, optionally at least one group VIIA element, and optionally at least one group VIIB element. The invention also relates to the use of the catalyst for hydrocracking hydrocarbon feeds.

Abstract: A catalyst support comprising at least one matrix, at least one Y zeolite with a lattice parameter which is in the range 24.15 .ANG. to 24.38 .ANG. (1 nm=10 .ANG.) and at least one Y zeolite with a lattice parameter of more than 24.38 .ANG. and less than or equal to 24.51 .ANG.. The invention also concerns a catalyst comprising said support and at least one hydro-dehydrogenating element, and a conventional hydroconversion process for petroleum cuts using said catalyst.