초록 ▼

A bifunctional catalyst containing multimetal oxides, and a method for preparing the same, includes a support of a moulded mixture of silica and alumina in a weight ratio of 1:1.2-2.5, and upon the support is deposited 3-30% by weight of metal oxides based on the total weight of the catalyst. The me

A bifunctional catalyst containing multimetal oxides, and a method for preparing the same, includes a support of a moulded mixture of silica and alumina in a weight ratio of 1:1.2-2.5, and upon the support is deposited 3-30% by weight of metal oxides based on the total weight of the catalyst. The metal elements of the metal oxides are at least two selected from transition metal of period 4 of the periodic table and lanthanide. The metal oxides of the catalyst exist in the state of non-composite oxides.

대표청구항 ▼

[ What is claimed is:] [1.] A method for preparing a bifunctional catalyst containing multimetal oxides comprising the following steps:1)mixing silica and alumina used as support in a weight ratio of 1:1.2-2.5, moulding and calcining at 1000.degree. C.-1600.degree. C. for 2-8 hours in an oxidative a

[ What is claimed is:] [1.] A method for preparing a bifunctional catalyst containing multimetal oxides comprising the following steps:1)mixing silica and alumina used as support in a weight ratio of 1:1.2-2.5, moulding and calcining at 1000.degree. C.-1600.degree. C. for 2-8 hours in an oxidative atmosphere;2) treating the above calcined support in a 0.3-2M solution by a nitrate or acetate of a metal element selected from transition metals of period 4 of the periodic table and lanthanides;3) calcining the support after treatment in step 2) at 700.degree.-1200.degree. C. for 1-4 hours in a reductive atmosphere;4) mixing nitrates or acetates of at least two metal elements selected from transition metals in period 4 of the periodic table and lanthanides to form a solution in which the total concentration of metal ions is 1-2.5M, and adding one coordination agent selected from oxalic acid, amino acetic acid, 2-hydroxy-propanoic acid, succinic acid, hydroxy-butanedioic acid, tartaric acid, citric acid, o-phthalic acid, o-amino-benzoic acid and salicylaldoxime into the mixed solution in an amount of the coordination agent being 1/4-3/4 of the concentration of the metal ions;5) impregnating the support treated in step 3) in the impregnant prepared in step 4), then drying and activating at a temperature around 300.degree. C. to obtain said bifunctional catalyst containing multimetal oxides.