A catalyst for the ammoxidation of propylene to prepare acrylonitrile with a high yield thereof comprising an oxide composition of the empirical formula (I) MoaCobNicFedBieVfCagKhXiSijOk (I) wherein X is zirconium and/or chromium, the subscripts a, b, c, d, e, f, g, h, i and j respectively denote th
A catalyst for the ammoxidation of propylene to prepare acrylonitrile with a high yield thereof comprising an oxide composition of the empirical formula (I) MoaCobNicFedBieVfCagKhXiSijOk (I) wherein X is zirconium and/or chromium, the subscripts a, b, c, d, e, f, g, h, i and j respectively denote the number of the respective atoms of the elements, when a=10, b=0 to 8, c=0 to 8, (b+c)=2 to 10, d=0.3 to 7, e=0.01 to 3, f=0.01 to 2, g=0.01 to 5, h=0.05 to 0.5, i=0 to 2, j=10 to 50, and the subscript k denotes the number of oxygen atoms which satisfies the average valency of the elements other than oxygen and the ratio a:k being in a range of 10:30 to 80, which catalyst is prepared by preparing an aqueous slurry containing respective element-containing compounds, by spray drying the aqueous slurry to prepare a dried solid precursory catalyst and, finally, by calcining the precursory catalyst as a temperature of from 500°to 750°C. to provide an activated catalyst.
대표청구항▼
A catalyst for producing acrylonitrile by the catalytic ammoxidation of propylene, said catalyst comprising an oxide composition of the empirical formula (I): MoaCobNicFedBieVfCagKhXiSijOk (I) wherein X represents at least one element selected from the group consisting of zirconium and chromium, the
A catalyst for producing acrylonitrile by the catalytic ammoxidation of propylene, said catalyst comprising an oxide composition of the empirical formula (I): MoaCobNicFedBieVfCagKhXiSijOk (I) wherein X represents at least one element selected from the group consisting of zirconium and chromium, the subscripts a, b, c, d, e, f, g, h, i and j respectively denote the number of the respective atoms of the elements, and the ratio a:b:c:d:e:f:g:h:i:j is in a range of 10:0 to 8:0 to 8:0.3 to 7:0.01 to 3:0.01 to 2:0.01 to 5:0.05 to 0.5:0 to 2:10 to 50, the ratio a:(b+c) being in a range of 10:2 to 10, and the subscript k denotes the number of oxygen atoms which satisfies the average valency of the elements other than oxygen, the ratio a:k being in a range of 10:30 to 80, and said catalyst is prepared by (a) mixing an aqueous liquid with (1) a molybdenum-containing compound, (2) at least one member selected from cobalt- and nickel-containing compounds, (3) an iron-containing compound, (4) a bismuth-containing compound, (5) a vanadium-containing compound, (6) a calcium-containing compound, (7) a potassium-containing compound, (8) at least one member selected from zirconium- and chromium-containing compounds, and (9) a silicon-containing compound, each in an amount sufficient to satisfy the abovespecified atomic ratio of the elements in the empirical formula (I), to prepare an aqueous slurry, said aqueous slurry containing not more than 15% of the sum of the respective element-containing compounds, which are in the form of solid particles having a size of 2 microns or less, based on the entire weight of said aqueous slurry, and having a pH of 1.0 or less; (b) spray drying said aqueous slurry to form a dried solid precursor catalyst, and (c) calcining said precursor catalyst at a temperature of from 500°to 750°C. to prepare an activated catalyst.
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이 특허에 인용된 특허 (3)
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