摘要:
The invention relates to a method for the hydrodesulphurisation of at least one gasoline fraction, using a catalyst comprising, in the oxide form thereof, at least one metal selected from the group VIB metals and/or at least one metal from the group VIII metals of the periodic table, present in the form of at least one polyoxometalate having formula (HhXxMmOy)q-, wherein: X is an element selected from among phosphorus (P), silicon (Si), boron (B), nickel (Ni) and cobalt (Co), said element being taken alone; M is one or more elements selected from among molybdenum (Mo), tungsten (W), nickel (Ni) and cobalt (Co); O is oxygen; H is hydrogen; h is an integer between 0 and 12; x is an integer between 0 and 4; m is an integer equal to 5, 6, 7, 8, 9, 10, 11, 12 and 18; y is an integer between 17 and 72; and q is an integer between 1 and 20, said polyoxometalates being present inside a mesostructured silica oxide matrix having a pore size between 1.5 and 50 nm and amorphous walls with a thickness of between 1 and 30 nm. The catalyst is sulphurised prior to use in said method.
摘要:
The invention relates to a method for preparing a catalyst containing at least one Group VIII metal, at least one Group VIB metal, and at least one support, wherein the method includes, in series: i) one of the steps selected from among: i1) a step of placing a precatalyst, containing said Group VIII metal, said Group VIB metal, and said support, in contact with a cyclic oligosaccharide containing at least six glucopyranose subunits bonded at α-(1,4); a step i2) of placing the support in contact with a solution containing a precursor of said Group VIII metal, a precursor of said Group VIB metal, and a cyclic oligosaccharide containing at least six glucopyranose subunits bonded at α-(1,4); and i3) a first step of placing said support in contact with a cyclic oligosaccharide containing at least six glucopyranose subunits bonded at α-(1,4), followed by a second step of placing the solid from the first step in contact with a precursor of said Group VIII metal and a precursor of said Group VIB metal; ii) a drying step; and iii) a heat-treatment step.
摘要:
The invention relates to a method for the hydrodesulphurisation of at least one diesel fraction, using a catalyst comprising, in the oxide form thereof, at least one metal selected from the group VIB metals and/or at least one metal from the group VIII metals of the periodic table, present in the form of at least one polyoxometalate having formula (HhXxMmOy)q-, wherein: X is an element selected from among phosphorus (P), silicon (Si), boron (B), nickel (Ni) and cobalt (Co), said element being taken alone; M is one or more elements selected from among molybdenum (Mo), tungsten (W), nickel (Ni) and cobalt (Co); O is oxygen; H is hydrogen; h is an integer between 0 and 12; x is an integer between 0 and 4; m is an integer equal to 5, 6, 7, 8, 9, 10, 11, 12 and 18; y is an integer between 17 and 72; and q is an integer between 1 and 20, said polyoxometalates being present inside a mesostructured silica oxide matrix having a pore size between 1.5 and 50 nm and amorphous walls with a thickness of between 1 and 30 nm. The catalyst is sulphurised prior to use in said method.
摘要:
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.
摘要:
The invention relates to a catalyst that can be used in hydrotreatment methods, comprising an amorphous support based on alumina, phosphorus, a dialkyl succinate C1-C4, acetic acid, and a hydro-dehydrogenating function comprising at least one element of group VIII and at least one element of the group VIB, preferably consisting of cobalt and molybdenum, the Raman spectrum of the catalyst comprising the strongest bands characteristic of the Keggin heteropolyanions (974 and/or 990 cm -1 ), the dialkyl succinate C1-C4 and the acetic acid (896 cm -1 ). Preferably, the dialkyl succinate used is dimethyl succinate and its main band is 853 cm -1 . The invention also relates to the method for preparing said catalyst, wherein a catalytic precurser comprising the elements of the group VIB and the group VIII, especially the molybdenum-cobalt couple, and phosphorus, that have been introduced by impregnation, then dried at a temperature lower than 180°C, is impregnated by the dialkyl succinate C1-C4, the acetic acid and the phosphorus compound, if the latter has not already been previously fully introduced, and then, after maturation, is dried to a temperature lower than 180°C before being optionally sulfurated. The invention further relates to the use of said catalyst in any hydrotreatment method.