摘要:
A process is described for preparing a catalyst comprising at least one porous support and at least one metallic phase containing nickel and tin in a proportion such that the Sn/Ni molar ratio is in the range 0.01 to 0.2, said process comprising at least the following steps in succession: a) depositing nickel on at least said support in order to obtain a supported nickel-based monometallic catalyst; b) reducing said monometallic catalyst in the presence of at least one reducing gas; c) depositing, in the gas phase and in the presence of at least one reducing gas, at least one organometallic tin compound onto said reduced monometallic catalyst; and d) activating the solid derived from said step c) in the presence of at least one reducing gas.
摘要:
The invention concerns a catalyst comprising nickel on an aluminum oxide support. The aluminum oxide support has, in the calcined state, a diffractogram obtained by X ray diffractometry comprising peaks which correspond to the following interplanar spacings and relative intensities: Interplanar spacingsRelative intensities d (10−10 m )I/I0 (%) 5.03 to 5.221-5 4.56 to 4.60 1-10 4.06 to 4.101-5 2.80 to 2.85 5-20 2.7315-35 2.60 5-10 2.4335-40 2.2930-40 1.9960-95 1.9525-50 1.79 1-10 1.53 5-10 1.51 5-10 1.4140-60 1.39100 1.23 to 1.261-5 1.14 5-10 1.111-5 1.041-5 1.00 5-10 0.97 1-5.
摘要:
The invention concerns a catalyst comprising nickel on an aluminium oxide support. The aluminium oxide support has, in the calcined state, a diffractogram obtained by X ray diffractometry comprising peaks which correspond to the following interplanar spacings and relative intensities: Interplanar spacingsRelative intensities d (10−10 m )I/I0 (%) 5.03 to 5.22 1-5 4.56 to 4.60 1-10 4.06 to 4.10 1-5 2.80 to 2.85 5-20 2.7315-35 2.60 5-10 2.4335-40 2.2930-40 1.9960-95 1.9525-50 1.79 1-10 1.53 5-10 1.51 5-10 1.4140-60 1.39100 1.23 to 1.26 1-5 1.14 5-10 1.11 1-5 1.04 1-5 1.00 5-10 0.97 1-5
摘要:
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.
摘要:
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.
摘要:
The invention concerns a catalyst comprising palladium on an oxide of aluminum support. In the calcined state, the oxide of aluminum support has a diffractogram obtained by X ray diffraction comprising peaks which correspond to the following interplanar spacings and relative intensities: Interplanar spacings d (10−10 m)Relative intensities ±5 × 10−3 dI/I0 (%) 4.54 3-10 2.70-2.75 5-25 2.41 35-45 2.28 15-30 2.10 0-10 1.98730-50 1.95830-50 1.6420-5 1.51910-20 1.394100
摘要:
The invention concerns a catalyst comprising a porous support, palladium, at least one metal selected from the group constituted by alkalis and alkaline-earths, in which: the specific surface area of the porous support is in the range 50 to 210 m2/g; the palladium content in the catalyst is in the range 0.05% to 2% by weight; at least 80% by weight of the palladium is distributed in a crust at the periphery of the support, the thickness of said crust being in the range 20 to 200 μm; the metallic dispersion D is in the range 25% to 70%; the density of the palladium particles in the crust is in the range 1500 to 4100 particles of palladium per μm2; and said alkali and/or alkaline-earth metal is distributed homogeneously across the support. The invention also concerns the preparation of the catalyst and its use in selective hydrogenation.
摘要:
The invention relates to a process for selective hydrogenation by bringing a so-called C2 fraction feedstock into contact with a fixed catalyst bed, whereby said catalyst comprises a substrate and a metal phase that consists of either gold or palladium and gold with a molar ratio of gold to palladium of greater than 5, whereby the contact is carried out in the presence of a solvent that comprises at least one aromatic hydrocarbon, whereby the products that are obtained at the end of the selective hydrogenation can be separated from the solvent by distillation.
摘要:
The invention concerns a catalyst comprising palladium on an oxide of aluminium support. In the calcined state, the oxide of aluminium support has a diffractogram obtained by X ray diffraction comprising peaks which correspond to the following interplanar spacings and relative intensities: Interplanar spacings d (10−10 m)Relative intensities ±5 × 10−3 dI/I0 (%) 4.54 3-10 2.70-2.75 5-25 2.41 35-45 2.28 15-30 2.10 0-10 1.98730-50 1.95830-50 1.6420-5 1.51910-20 1.394100
摘要:
The invention concerns a catalyst comprising a porous support, palladium, at least one metal selected from the group constituted by alkalis and alkaline-earths, in which: the specific surface area of the porous support is in the range 50 to 210 m2/g; the palladium content in the catalyst is in the range 0.05% to 2% by weight; at least 80% by weight of the palladium is distributed in a crust at the periphery of the support, the thickness of said crust being in the range 20 to 200 μm; the metallic dispersion D is in the range 25% to 70%; the density of the palladium particles in the crust is in the range 1500 to 4100 particles of palladium per μm2; and said alkali and/or alkaline-earth metal is distributed homogeneously across the support. The invention also concerns the preparation of the catalyst and its use in selective hydrogenation.