Abstract: Process for fixed-bed reforming of a hydrocarbon-based feedstock comprising n-paraffinic, naphthenic and aromatic hydrocarbons, at a temperature of between 400 and 700° C., a pressure of between 0.1 and 4 MPa, and a mass flow of feedstock treated per unit mass of catalyst and per hour of between 0.1 and 10 h?1, by bringing said feedstock into contact with a catalyst comprising platinum, a promoter metal selected from the group consisting of rhenium and iridium, a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine, and a porous alumina support in the form of an extrudate characterized by a length “l” of between 1 and 10 mm, a section comprising four lobes, the largest diameter “D” of the cross section of said extrudate being between 1 and 3 mm.

Abstract: Method for treating a gaseous feedstock containing molecular oxygen and one or more volatile compounds, which method comprises the following steps: a) bringing said gaseous feedstock containing molecular oxygen and one or more volatile organic compounds into contact with a monolith comprising silica and titanium dioxide, said monolith comprising a type-I macropore volume, of which the diameter of the pores is greater than 50 nm and less than or equal to 1000 nm, of between from 0.1 to 3 ml/g, and a type-II macropore volume, of which the diameter of the pores is greater than 1 ?m and less than or equal to 10 ?m, of between from 1 to 8 ml/g; b) irradiating said monolith with at least one irradiation source producing at least one wavelength lower than 400 nm in order to convert said volatile organic compounds into carbon dioxide, said step b) being carried out at a temperature between ?30° C. and +200° C. and at a pressure between 0.01 MPa and 70 MPa.

Abstract: The invention relates to a process for the catalytic cracking of a gasoline feedstock for the production of light olefins, in which said gasoline feedstock is brought into contact with a catalyst comprising at least one zeolite NU-86, alone or in a mixture with at least one other zeolite, at a temperature comprised between 500 and 700° C., at an absolute pressure comprised between 10 and 60 MPa, and with a contact time of the feedstock on said catalyst comprised between 10 milliseconds and 100 seconds.

Abstract: The invention relates to a method for manufacturing macroscopic fibers of titanium dioxide (TiO2) by continuous extrusion in a one-way flow, to the macroscopic fibers of TiO2 that can be obtained by such a method, to the use of said fibers in heterogeneous photocatalysis for decontamination of organic pollutants from gaseous environments, and to a method for decontaminating gaseous environments, in particular air, using such fibers.

Abstract: The invention relates to a process for the catalytic cracking of a gasoline feedstock for the production of light olefins, in which said gasoline feedstock is brought into contact with a catalyst comprising at least one zeolite NU-86, alone or in a mixture with at least one other zeolite, at a temperature comprised between 500 and 700° C., at an absolute pressure comprised between 10 and 60 MPa, and with a contact time of the feedstock on said catalyst comprised between 10 milliseconds and 100 seconds.

Abstract: The invention concerns a process for preparing a catalyst comprising at least one metal M from the platinum group, tin, a phosphorus promoter, a halogenated compound, a porous support and at least one promoter X1 selected from the group constituted by gallium, indium, thallium, arsenic, antimony and bismuth. The promoter or promoters X1 and the phosphorus are introduced during one or more sub-steps a1) or a2), the sub-step a1) corresponding to synthesis of the precursor of the main oxide and sub-step a2) corresponding to shaping the support. The tin is introduced during at least one of sub-steps a1) and a2). The product is dried and calcined before depositing at least one metal M from the platinum group. The ensemble is then dried in a stream of neutral gas or a stream of gas containing oxygen, and then is dried. The invention also concerns the use of a catalyst obtained by said process in catalytic reforming or aromatics production reactions.

Abstract: The present invention concerns spheroidal alumina particles, catalysts comprising such particles as a support and a process for the production of spheroidal alumina particles, comprising the following steps: a) preparing a suspension comprising water, an acid and at least one boehmite powder for which the ratio of the crystallite dimensions in the [020] and [120] directions obtained using the Scherrer X-ray diffraction formula is in the range 0.7 to 1; b) adding a pore-forming agent, a surfactant and optionally water, or an emulsion comprising at least one pore-forming agent, a surfactant and water to the suspension of step a); c) mixing the suspension obtained in step b); d) shaping the spheroidal particles by the oil-drop method using the suspension obtained in step c); e) drying the particles obtained in step d); f) calcining the particles obtained in step e).

Abstract: The invention relates to a method for manufacturing macroscopic fibres of titanium dioxide (TiO2) by continuous extrusion in a one-way flow, to the macroscopic fibres of TiO2 that can be obtained by such a method, to the use of said fibres in heterogeneous photocatalysis for decontamination of organic pollutants from gaseous environments, and to a method for decontaminating gaseous environments, in particular air, using such fibres.

Abstract: The invention relates to a process for production of propylene from a C4/C5 olefin cut (for example from steam cracking and/or catalytic cracking), this process comprising an optional selective hydrogenation, a selective oligomerization of the isobutenes and an oligocracking of the n-butenes. The invention makes it possible to obtain a high conversion rate with a good propylene yield and to maximize the production of good-quality gasoline.

Abstract: The present invention concerns spheroidal alumina particles, catalysts comprising such particles as a support and a process for the production of spheroidal alumina particles, comprising the following steps: a) preparing a suspension comprising water, an acid and at least one boehmite powder for which the ratio of the crystallite dimensions in the [020] and [120] directions obtained using the Scherrer X-ray diffraction formula is in the range 0.7 to 1; b) adding a pore-forming agent, a surfactant and optionally water, or an emulsion comprising at least one pore-forming agent, a surfactant and water to the suspension of step a); c) mixing the suspension obtained in step b); d) shaping the spheroidal particles by the oil-drop method using the suspension obtained in step c); e) drying the particles obtained in step d); f) calcining the particles obtained in step e).

Abstract: The present invention concerns an optimized reforming catalyst comprising at least platinum, at least one promoter metal selected from the group formed by rhenium and iridium, at least one halogen, and at least one alumina support with a low sulphur and phosphorus content.

Abstract: An axial flow staged zone oligomerization reaction process includes the steps of passing a hydrocarbon feedstock into the lower portion of the axial flow staged zone reactor which includes axial circulation of the hydrocarbon reaction fluid serially in each of the reaction zones, passing catalyst through a constriction zone located between successive upper and lower catalytic reaction zones which includes heat exchanging of the fluids being the constriction zone within the reactor and further includes withdrawing the oligomerized product from the top of the reactor.

Abstract: Described is a process for the treatment of at least one zeolite having a pore size of less than or equal to 7 ? comprising at least a) a step for dealumination of said zeolite, b) a cationic exchange step using at least one cation other than H+, c) a step for treatment of said zeolite obtained in step b) in the presence of at least one molecular compound containing at least one silicon atom, and d) at least one heat treatment step. The present invention also concerns the preparation of a catalyst containing the zeolite treated in accordance with the treatment process the subject-matter of the invention and the use of said catalyst in a process for the oligomerization of an olefinic charge containing hydrocarbon molecules having from 2 to 12 carbon atoms per molecule.

Abstract: The invention relates to a process for dehydrogenation of a hydrocarbon feedstock in the presence of a catalyst that comprises a noble metal M that is selected from the group that consists of platinum, palladium, rhodium, and iridium, at least one promoter X1 that is selected from the group that consists of tin, germanium, and lead, and optionally a promoter X2 that is selected from the group that consists of gallium, indium and thallium, an alkaline or alkaline-earth compound and a porous substrate, in which the atomic ratio X1/M and optionally X2/M is between 0.3 and 8, the Hir/M ratio that is measured by hydrogen adsorption is greater than 0.40, and the bimetallicity index BMI that is measured by hydrogen/oxygen titration is greater than 108.

Abstract: The invention concerns a process for preparing a catalyst comprising at least one metal M from the platinum group, tin, a phosphorus promoter, a halogenated compound, a porous support and at least one promoter X1 selected from the group constituted by gallium, indium, thallium, arsenic, antimony and bismuth. The promoter or promoters X1 and the phosphorus are introduced during one or more sub-steps a1) or a2), the sub-step a1) corresponding to synthesis of the precursor of the main oxide and sub-step a2) corresponding to shaping the support. The tin is introduced during at least one of sub-steps a1) and a2). The product is dried and calcined before depositing at least one metal M from the platinum group. The ensemble is then dried in a stream of neutral gas or a stream of gas containing oxygen, and then is dried. The invention also concerns the use of a catalyst obtained by said process in catalytic reforming or aromatics production reactions.

Abstract: A catalyst is described which comprises at least one zeolite with structure type EUO, at least one zeolite selected from IM-5 zeolite and zeolites with structure type MFI, MOR, BEA and MTW, at least one group VIII metal, at least one group IIIA metal and at least one porous mineral matrix. The catalyst of the invention is used in a process for isomerizing a feed comprising aromatic compounds containing 8 carbon atoms per molecule.

Abstract: The invention concerns a catalyst comprising at least one metal M from group VIII, tin, a phosphorus promoter, a halogenated compound, a porous support and at least one promoter X1 selected from the group constituted by gallium, indium, thallium, arsenic, antimony and bismuth. In 119Sn Mössbauer spectroscopy, the catalyst in the reduced form has a signal with a quadripole splitting value in the range 0 to 0.45 mm/s and an isomer shift, IS, in the range 1.5 to 2.4 mm/s with respect to CaSnO3, said signal representing in the range 1% to 30% of the total area of the signals.

Abstract: The present invention concerns an optimized reforming catalyst comprising at least platinum, at least one promoter metal selected from the group formed by rhenium and iridium, at least one halogen, and at least one alumina support with a low sulphur and phosphorus content.

Abstract: The invention relates to a catalyst that comprises a metal M from the group of platinum, at least one promoter X1 that is selected from the group that consists of tin, germanium, and lead, and optionally at least one promoter X2 that is selected from the group that consists of gallium, indium and thallium, a halogenated compound and a porous substrate, in which the atomic ratio X1/M and optionally X2/M is between 0.3 and 8, the Hir/M ratio that is measured by hydrogen adsorption is greater than 0.40, and the bimetallicity index BMI that is measured by hydrogen/oxygen titration is greater than 108. The invention also relates to the process for the preparation of this catalyst and a reforming process using said catalyst.

Abstract: An EUO-structural-type zeolite that comprises at least one element X that is selected from among silicon and germanium and at least one element T that is selected from among aluminum, iron, gallium, vanadium, zirconium, molybdenum, arsenic, antimony, chromium and manganese is described. It contains at least one alkyl quinuclidinium cation in its intracrystalline pores and has an N/X atomic ratio of more than 0.065, whereby N represents the nitrogen element. This invention also relates to a process for preparation of said zeolite and the use of the latter as an acidic solid in a process for conversion of hydrocarbon feedstocks.