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 μm. The matrix based on silicon oxide may contain aluminum. The catalyst also optionally comprises at least one doping element in a controlled quantity selected from phosphorus, boron and silicon, optionally at least one element from group VB of the periodic table of the elements, and optionally an element from group VIIA. The invention also concerns hydrocracking/hydroconversion and hydrotreatment processes employing said catalyst.
Abstract:
The invention relates to a catalyst including at least one hydro-dehydrogenating element chosen from the group formed by the group VIB and group VIII elements of the periodic table and a substrate based on a silica-alumina matrix with a reduced content of macropores containing a quantity greater than 5% by weight and less than or equal to 95% by weight of silica (SiO2) and based on at least one zeolite.The invention also relates to a substrate based on a silica-alumina matrix with a reduced content of macropores containing a quantity greater than 5% by weight and less than or equal to 95% by weight of silica (SiO2) and based on at least one zeolite.The invention also relates to hydrocracking and/or hydroconversion processes and hydrotreating processes utilizing a catalyst according to the invention.
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 subsequent stage, whereby the latter uses a catalyst that is selected from the group that consists of hydrorefining catalysts and catalysts that comprise at least one mixed oxide, a metal of group VIB, and a non-noble metal of group VIII. The conversion of products that have a boiling point of less than 150° C. is, for the hydrorefining stage, between 1 and 15% by weight. The temperature, TR2, of the subsequent 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 preparing a crystalline metalloaluminosilicate by direct synthesis using at least one source of aluminium and, as the source of silicon and as the source of at least one other metal M, at least one lamellar siliceous material containing metals in its framework. The invention also concerns the novel solids obtained, in particular solids with a given zeolitic structure containing particular metals in its zeolitic framework.
Abstract:
The invention concerns a process for reducing emissions of oxides of nitrogen in a medium which is super-stoichiomeitric in oxidising agents, comprising: a) a step for oxidising at least a portion of the oxides of nitrogen in the presence of an oxidation material; b) a step for injecting organic compounds which comprise at least one atom selected from carbon, hydrogen, oxygen and nitrogen; c) a step for adsorbing at least a portion of the organic compounds onto an adsorption material in the form of molecular species and/or carbonaceous residues; d) a step for selective reduction of at least a portion of the oxides of nitrogen to molecular nitrogen by at least a portion of the molecular species and/or carbonaceous residues formed on the adsorption material.
Abstract translation:本发明涉及一种减少氧化剂中超化学计量的介质中氮氧化物排放的方法,包括:a)在氧化物质存在下氧化至少一部分氮氧化物的步骤; b )用于注入包含至少一个选自碳,氢,氧和氮的原子的有机化合物的步骤; c)将至少一部分有机化合物以分子种类和/或形式吸附到吸附材料上的步骤 碳质残渣; d)通过在吸附材料上形成的分子种类和/或碳质残渣的至少一部分,将至少一部分氮氧化物选择还原成分子氮的步骤。
Abstract:
The invention concerns a crystalline solid, designated ITQ-31, which has the X ray diffraction diagram given below. Said solid has a chemical composition, expressed as the anhydrous base in terms of moles of oxide, defined by the general formula XO2: mYO2:pZ2O3:qR:sF, in which R represents an organic nitrogen-containing template, X represents one or more tetravalent elements other than germanium, Y represents germanium, Z represents at least one trivalent element and F is fluorine.
Abstract:
The invention concerns a crystalline solid, designated ITQ-31, which has the X ray diffraction diagram given below. Said solid has a chemical composition, expressed as the anhydrous base in terms of moles of oxide, defined by the general formula XO2: mYO2:pZ2O3:qR:sF, in which R represents an organic nitrogen-containing template, X represents one or more tetravalent elements other than germanium, Y represents germanium, Z represents at least one trivalent element and F is fluorine.
Abstract:
The invention concerns an improved hydrocracking process having a step for eliminating polyaromatic compounds from at least a portion of a recycled fraction by adsorption on a particular adsorbent based on alumina-silica with a limited macropore content.
Abstract:
This invention relates to silico-aluminum substrates, catalysts, and the hydrocracking and hydrotreatment processes that use them. The catalyst comprises at least one hydro-dehydrogenating element that is selected from the group that is formed by elements of group VIB and group VIII of the periodic table and a non-zeolitic silica-alumina-based substrate that contains an amount of more than 5% by weight and less than or equal to 95% by weight of silica (SiO2) and has the following characteristics: A mean pore diameter, measured by mercury porosimetry, encompassed between 20 and 140 Å, a total pore volume, measured by mercury porosimetry, encompassed between 0.1 ml/g and 0.6 ml/g, a total pore volume, measured by nitrogen porosimetry, encompassed between 0.1 ml/g and 0.6 ml/g, a BET specific surface area encompassed between 100 and 550 m2/g, a pore volume, measured by mercury porosimetry, encompassed in the pores with diameters of more than 140 Å, of less than 0.1 ml/g, a pore volume, measured by mercury porosimetry, encompassed in the pores with diameters of more than 160 Å, of less than 0.1 ml/g, a pore volume, measured by mercury porosimetry, encompassed in the pores with diameters of more than 200 Å, of less than 0.1 ml/g, a pore volume, measured by mercury porosimetry, encompassed in the pores with diameters of more than 500 Å, of less than 0.01 ml/g, an X diffraction diagram contains at least the main lines that are characteristic of at least one of the transition aluminas contained in the group that consists of the alpha, rho, chi, eta, gamma, kappa, theta and delta aluminas.
Abstract:
The present invention concerns doped catalysts on a mixed zeolite/alumino-silicate support with a low macropore content, and hydrocracking/hydroconversion and hydrotreatment processes employing them. The catalyst comprises at least one hydrodehydrogenating element selected from the group formed by elements from group VIB and group VIII of the periodic table and a doping element in a controlled quantity selected from phosphorus, boron and silicon, and a support based on zeolite Y defined by a lattice parameter a of the unit cell in the range 24.40×10−10 m to 24.15×10−10 m and silica-alumina containing a quantity of more than 5% by weight and 95% by weight or less of silica (SiO2).