Institut Francais du Petrole (Rueil-Malmaison FRX 03)
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초록▼
This invention concerns a method of preparing catalysts and certain catalysts which can be obtained by the method. The method comprises (a) coprecipitating at least a group VIII metal sulfide with at least a group VIB metal sulfide, at a pH maintained at a value of 4.5 to 8; (b) separating the resul
This invention concerns a method of preparing catalysts and certain catalysts which can be obtained by the method. The method comprises (a) coprecipitating at least a group VIII metal sulfide with at least a group VIB metal sulfide, at a pH maintained at a value of 4.5 to 8; (b) separating the resultant precipitate; (c) drying the precipitate; and (d) calcining the dried precipitate; all the steps being effected under an inert atmosphere. The catalysts have a stoichiometry of 1.2 to 2.2 atoms of sulfur per metal atom, a crystallographic structure of molybdenite for the group VIB metal sulfide(s) and pyrite for the group VIII metal sulfide(s) and characterized by an X-ray diffraction powder pattern having at least two principal peaks a and b of the disulfide of each group VIB metal used (peaks a, b, c, d), and two principal peaks f and j of the disulfide of each group VIII metal used, (peaks e, f, g, h, i, j, k), the height of the principal peak of a group VIII metal monosulfide (1), if it appears being less than 5 times that of the principal peak (f) of the disulfide of the same metal, which are particularly active for all reactions between hydrogen and a mixture of hydrocarbons containing sulfide compounds.
대표청구항▼
A process for preparing a hydrotreatment catalyst comprising an intimate mixture of at least one group VI B metal sulfide and at least one group VIII metal sulfide characterized in that it comprises the following steps: (a) reacting, at a pH maintained at a value of 4.5 to 8, an aqueous solution of
A process for preparing a hydrotreatment catalyst comprising an intimate mixture of at least one group VI B metal sulfide and at least one group VIII metal sulfide characterized in that it comprises the following steps: (a) reacting, at a pH maintained at a value of 4.5 to 8, an aqueous solution of at least one soluble salt of at least one group VIII metal and at least one ammonium salt of a polyanion of at least one group VI B metal, with at least one water-soluble sulfiding agent, under conditions which form a coprecipitate of sulfides; (b) separating the resultant precipitate from the mother liquors; (c) drying said precipitate; and (d) calcining the dried precipitate; all of said steps being effected under an inert atmosphere. A catalyst comprising an intimate mixture of at least one sulfide of a group VI B metal and at least one sulfide of a group VIII metal, characterized in that said sulfides are present in a stoichiometry of from 1.2 to 2.2 atoms of sulfur per atom of metal, a ratio of the number of atoms of group VIII metal to the total number of metal atoms of from 0.35 to 0.95, and having a crystallagraphic structure of molybdenite for the group VI B metal sulfide and of pyrite for the group VIII metal sulfide, said intimate mixture exhibiting an X-ray powder diffraction diagram at the wave length of the copper Kalpha peak having at least two principle peaks characteristic of the group VI B metal(s) disulfide(s) the height of the peak denoted (002) in the Miller indices being situated at a Bragg angle of from 7.0 to 7.30 degrees and its angular width at half-height being from 0.5 to 1.5 degrees, the diffraction diagram also having at least the two principle peaks of the disulfide of each of the group VIII metals used, the angular width at half-height of the most intense peak denoted (200) in the Miller indices of the major group VIII metal disulfide being from 0.05 to 1 degree, the diffracted intensity at the top of this peak being higher than the diffracted intensity at the height of the (002) peak of the major group VI B metal disulfide, the diffraction diagram being such that, when peaks characteristic of a group VIII metal monosulfide are present, the height of the principle peak (100) is less than 5 times that of the principle peak (200) of the disulfide of the same metal, and such that, when peaks characteristic of the dioxide of the major group VI B metal appear, the height of the principle peak (110) of this dioxide is less than 0.5 times that of the principle peak (002) of the disulfide of the same metal.
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이 특허를 인용한 특허 (50)
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