Abstract: The invention relates to a catalyst that comprises at least the tantalum element, at least an aldolizing element and at least a mesoporous oxide matrix, with the tantalum mass being between 0.1 and 30% of the mesoporous oxide matrix mass, the mass of the at least one aldolizing element being between 0.02 and 4% of the mesoporous oxide matrix mass, and use thereof.

Abstract: A mesoporous mixed oxide catalyst that comprises silicon and at least one metal M that is selected from the group that consists of the elements of groups 4 and 5 of the periodic table and mixtures thereof, with the mass of metal M being between 0.1 and 20% of the mixed oxide mass.

Abstract: Process for simultaneous dehydration and skeletal isomerization of a feedstock that comprises at least one C4 monoalcohol and that contains between 0.5 and 50% water, for the purpose of producing C4 alkenes, with said process operating at a temperature of between 250 and 550° C., under a pressure of between 0.1 and 1 MPa, with an hourly volumetric flow rate of between 0.1 and 10 h?1, characterized in that it uses a catalyst that comprises at least one non-zeolitic aluminosilicate-type solid.

Abstract: A method for preparing a porous inorganic material by at least: a) reaction of a mixture of one precursor of the oxide of a metal X in solution and a precursor of the oxide of a metal Y at a temperature of between 30 and 70° C., X and Y being, independently aluminum, cobalt, indium, molybdenum, nickel, silicon, titanium, zirconium, zinc, iron, copper, manganese, gallium, germanium, phosphorus, boron, vanadium, tin, lead, hafnium, niobium, yttrium, cerium, gadolinium, tantalum, tungsten, antimony, europium or neodymium; b) mixing of the mixture obtained at the end of a) at a temperature of between 80 and 150° C., the mixing period being adjusted so as to obtain a paste that exhibits a fire loss of between 20% by weight and 90% by weight; c) shaping of the porous inorganic material; a) to c) being performed within an extruder.

Abstract: A process is described for the preparation of an inorganic material with a hierarchical porosity in the micropore and mesopore domains. The material has at least two elementary spherical particles having a maximum diameter of 200 microns. The process comprises: a) preparing a solution containing zeolitic nanocrystals with a maximum nanometric dimension equal to 60 nm based on silicon and/or precursor elements of proto-zeolitic entities based on silicon; b) mixing, in solution, metallic particles or at least one metallic precursor of metallic particles, a surfactant and the solution obtained in accordance with a) such that the ratio of the volumes of inorganic and organic materials, Vinorganic/Vorganic, is 0.29 to 0.50; c) aerosol atomization of the solution obtained in b) resulting in formation of spherical particles; d) drying the particles; g) eliminating any remaining precursor elements of proto-zeolitic entities based on silicon and the surfactant.

Abstract: This invention has as its object a process for simultaneous dehydration and skeletal isomerization of a feedstock that comprises at least one C4 monoalcohol and that contains between 0.5 and 50% water, for the purpose of producing C4 alkenes, with said process operating at a temperature of between 250 and 550° C., under a pressure of between 0.1 and 1 MPa, with an hourly volumetric flow rate of between 0.1 and 10 h-1, characterized in that it uses a catalyst that comprises at least one mesostructured material that comprises silicon and at least one element X that is selected from among aluminum, boron, gallium, indium, and germanium.

Abstract: A process of hydrodesulphuration of at least one gasoline cut implementing a catalyst comprising, in its oxide form, at least one metal from group VIB and/or at least one metal from group VIII of the periodic table, present in the form of at least one polyoxometalate of the formula (HhXxMmOy)q?, wherein X is an element selected from phosphorus, silicon, boron, nickel and cobalt, M is one or more element(s) selected from molybdenum, tungsten, nickel and cobalt, h is an integer from 0-12, x is an integer from 0-4, m is an integer 5, 6, 7, 8, 9, 10, 11, 12 and/or 18, y is an integer of 17-72 and q is an integer of 1-20, the polyoxometalates being present within a mesostructured silicon oxide matrix having a pore size of 1.5-50 nm and having amorphous walls of thickness 1-30 nm, the catalyst being sulphured before use in the process.

Abstract: The invention relates to a process of hydrodesulphuration of at least one gasoil cut implementing a catalyst containing, in its oxide form, at least one metal from group VIB and/or at least one metal from group VIII of the periodic table, present in the form of at least one polyoxometalate of the formula (HhXxMmOy)q?, said polyoxometalates being present within a mesostructured silicon oxide matrix having a pore size within the range 1.5 to 50 nm and having amorphous walls of thickness within the range 1 to 30 nm, the said catalyst being sulphured before being implemented in the said process.

Abstract: A process for the hydrocracking a hydrocarbon-containing feedstock in which at least 50% by weight of the compounds have an initial boiling point above 340° C. and a final boiling point below 540° C., using a catalyst having, in its oxide form, at least one metal selected from the metals of groups VIB, VIII and VB, said metals being present in the form of at least one polyoxometallate of formula (HhXxMmOy)q?, said polyoxometallates being present within a mesostructured matrix based on oxide of at least one element Y, said matrix having a pore size between 1.5 and 50 nm and having amorphous walls of thickness between 1 and 30 nm, said catalyst being sulphurized before used in said process.

Abstract: An inorganic material is described, which consists of at least two elementary spherical particles, each one of said spherical particles comprising metallic nanoparticles of size ranging between 1 and 300 nm and a mesostructured matrix based on an oxide of at least one element X selected from the group made up of silicon, aluminum, titanium, tungsten, zirconium, gallium, germanium, tin, antimony, lead, vanadium, iron, manganese, hafnium, niobium, tantalum, yttrium, cerium, gadolinium, europium and neodymium, and the mixture of at least two of these elements, said mesostructured matrix having a pore diameter ranging between 1.5 and 30 nm and having amorphous walls of thickness ranging between 1 and 30 nm, said elementary spherical particles having a diameter D greater than 10 ?m and less than or equal to 100 ?m. Said material can also contain zeolite nanocrystals trapped within said mesostructured matrix.

Abstract: Process for simultaneous dehydration and skeletal isomerization of a feedstock that comprises at least one C4 monoalcohol and that contains between 0.5 and 50% water, for the purpose of producing C4 alkenes, with said process operating at a temperature of between 250 and 550° C., under a pressure of between 0.1 and 1 MPa, with an hourly volumetric flow rate of between 0.1 and 10 h?1, characterized in that it uses a catalyst that comprises at least one non-zeolitic aluminosilicate-type solid.

Abstract: This invention has as its object a process for simultaneous dehydration and skeletal isomerization of a feedstock that comprises at least one C4 monoalcohol and that contains between 0.5 and 50% water, for the purpose of producing C4 alkenes, with said process operating at a temperature of between 250 and 550° C., under a pressure of between 0.1 and 1 MPa, with an hourly volumetric flow rate of between 0.1 and 10 h-1, characterized in that it uses a catalyst that comprises at least one mesostructured material that comprises silicon and at least one element X that is selected from among aluminum, boron, gallium, indium, and germanium.

Abstract: The invention describes a catalyst comprising at least one material with a hierarchical porosity comprising silicon and at least one hydrodehydrogenating element from group VIB and/or group VIII of the periodic table of the elements. Said material with a hierarchical porosity comprising silicon is constituted by at least two elementary spherical particles, each of said spherical particles comprising zeolitic nanocrystals having a pore size in the range 0.2 to 2 nm and a matrix based on silicon oxide, which is mesostructured, having a pore size in the range 1.5 to 30 nm and having amorphous walls with a thickness in the range 1 to 30 nm, said elementary spherical particles having a maximum diameter of 100 ?m. The matrix based on silicon oxide may contain aluminum.

Abstract: The invention relates to a process of hydrodesulphuration of at least one gasoil cut implementing a catalyst containing, in its oxide form, at least one metal from group VIB and/or at least one metal from group VIII of the periodic table, present in the form of at least one polyoxometalate of the formula (HhXxMmOy)q?, said polyoxometalates being present within a mesostructured silicon oxide matrix having a pore size within the range 1.5 to 50 nm and having amorphous walls of thickness within the range 1 to 30 nm, the said catalyst being sulphured before being implemented in the said process.

Abstract: A catalyst that comprises at least one binder and at least one crystallized material with hierarchized and organized porosity in the fields of microporosity and mesoporosity is described, whereby said crystallized material consists of at least two elementary spherical particles, each of said particles comprising a mesostructured silicon-oxide-based matrix that has a mesopore diameter of between 1.5 and 30 nm and that has microporous and crystallized walls with a thickness of between 1 and 60 nm, whereby said elementary spherical particles have a maximum diameter of 200 microns. Said catalyst is used in a process for oligomerization of an olefinic feedstock that contains hydrocarbon molecules that have 2 to 12 carbon atoms per molecule.

Abstract: The invention relates to a process of hydrodesulphuration of at least one gasoline cut implementing a catalyst comprising, in its oxide form, at least one metal from group VIB and/or at least one metal from group VIII of the periodic table, present in the form of at least one polyoxometalate of the formula (HhXxMmOy)q?, wherein X is an element selected from phosphorus (P), silicon (Si), boron (B), nickel (Ni) and cobalt (Co), the said element being taken alone, M is one or more element(s) selected from molybdenum (Mo), tungsten (W), nickel (Ni) and cobalt (Co), O is oxygen, H is hydrogen, h is an integer within the range 0 to 12, x is an integer within the range 0 to 4, m is an integer equal to 5, 6, 7, 8, 9, 10, 11, 12 and 18, y is an integer within the range 17 to 72 and q is an integer within the range 1 to 20, the said polyoxometalates being present within a mesostructured silicon oxide matrix having a pore size within the range 1.

Abstract: A process for metathesis of olefins, bringing olefins into contact with a catalyst activated by heating to a temperature in the range 100° C. to 1000° C. in an atmosphere of non-reducing gas, the catalyst containing at least one inorganic material having at least two elementary spherical particles, each of which are metal oxide particles with a size of at most 300 nm and containing at least one of tungsten, molybdenum, rhenium, cobalt, tin, ruthenium, iron or titanium, alone or a mixture, the metal oxide particles being present within a mesostructured matrix of an oxide of at least one element Y: silicon, aluminium, titanium, tungsten, zirconium, gallium, germanium, tin, antimony, lead, vanadium, iron, manganese, hafnium, niobium, tantalum, yttrium, cerium, gadolinium, europium or neodymium or a mixture thereof, the matrix having pore size 1.5 to 50 nm and amorphous walls with thickness 1 to 30 nm and maximum diameter of 200 ?m.

Abstract: The present invention concerns a catalyst comprising at least one crystalline material comprising silicon with a hierarchical and organized porosity and at least one hydrodehydrogenating element selected from the group formed by elements from group VIB and/or group VIII of the periodic table of the elements. Said crystalline material comprising silicon with a hierarchical and organized porosity is constituted by at least two spherical elementary particles, each of said particles comprising a matrix based on oxide of silicon, which is mesostructured, with a mesopore diameter in the range 1.5 to 30 nm and having microporous and crystalline walls with a thickness in the range 1.5 to 60 nm, said elementary spherical particles having a maximum diameter of 200 microns. The invention also concerns hydrocracking/hydroconversion and hydrotreatment processes employing said catalyst.

Abstract: A process for oligomerization of an olefinic feedstock that contains olefinic hydrocarbon molecules that have 2 to 10 carbon atoms per molecule is described, whereby said process comprises bringing said feedstock into contact with a catalyst that comprises at least one amorphous material with hierarchized and organized porosity and consists of at least two elementary spherical particles, each of said particles comprising a mesostructured silicon-oxide-based matrix that has a mesopore diameter of between 1.5 and 30 nm and that exhibits amorphous and microporous walls with a thickness of between 1 and 50 nm, whereby said elementary spherical particles have a maximum diameter of 200 microns.

Abstract: The present invention concerns a catalyst comprising at least one amorphous material comprising silicon with a hierarchical and organized porosity and at least one hydrodehydrogenating element selected from the group formed by elements from group VIB and/or group VIII of the periodic table of the elements. Said amorphous material comprising silicon with a hierarchical and organized porosity is constituted by at least two spherical elementary particles, each of said spherical particles comprising a matrix based on oxide of silicon, which is mesostructured, with a mesopore diameter in the range 1.5 to 30 nm and having amorphous and microporous walls with a thickness in the range 1.5 to 50 nm, said elementary spherical particles having a maximum diameter of 200 microns. The invention also concerns hydrocracking/hydroconversion and hydrotreatment processes employing said catalyst.