Catalyst, method for filling catalyst, and method for producing compound using catalyst
A catalyst containing, as an essential component, molybdenum; bismuth; and cobalt, in which a sum (S) of ratios of peak intensities expressed by the following formula in an X-ray diffraction pattern obtained by using CuKα rays as an X-ray source is 42 or more and 113 or less. S={(peak intensity at 2θ=14.1°±0.1°)+(peak intensity at 2θ=25.4°±0.1°)+(peak intensity at 2θ=28.5°±0.1°)}/(peak intensity at 2θ=26.5°±0.1°)×100.
1 . A catalyst comprising, a catalytically active component carried on an inert carrier,
wherein a composition of the catalytically active component is represented by the following formula (I-1):
Mo a1 Bi b1 Ni c1 Co d1 Fe e1 X f1 Y g1 Z h1 O i1 (I-1)
wherein, in the formula (I-1), Mo, Bi, Ni, Co and Fe represent molybdenum, bismuth, nickel, cobalt and iron, respectively; X is at least one element selected from the group consisting of tungsten, antimony, tin, zinc, chromium, manganese, magnesium, silica, aluminum, cerium and titanium; Y is at least one element selected from the group consisting of sodium, potassium, cesium, rubidium, and thallium; Z belongs to the 1st to 16th groups in the periodic table and means at least one element selected from elements other than the above Mo, Bi, Ni, Co, Fe, X, and Y; a1, b1, c1, d1, e1, f1, g1, h1, and i1 represent the number of atoms of molybdenum, bismuth, nickel, cobalt, iron, X, Y, Z, and oxygen, respectively; when a1=12, 0<b1≤7, 0≤c1≤10, 0<d1≤10, 8.3≤c1+d1≤9.4, 0≤e1≤5, 0≤f1≤2, 0≤g1≤3, 0≤h1≤5, and i1 is a value determined by an oxidation state of each element, and
a sum(S) of ratios of peak intensities expressed by the following formula in an X-ray diffraction pattern obtained by using CuKα rays as an X-ray source is 42 or more and 113 or less,
S ={(peak intensity at 2θ=14.1°±0.1°)+(peak intensity at 2θ=25.4°+0.1°)+(peak intensity at 2θ=28.5°±0.1°)}/(peak intensity at 2θ=26.5°±0.1°)×100.
2 . The catalyst according to claim 1 , wherein a ratio (S4) of a peak intensity expressed by the following formula is 2 or more and 16 or less,
S 4=(peak intensity at 2θ=27.4°±0.1°)/(peak intensity at 2θ=26.5°±0.1°)×100.
3 . The catalyst according to claim 1 , wherein the inert carrier is silica, alumina, or a combination thereof.
4 . The catalyst according to claim 1 , which is a catalyst for producing at least one of an unsaturated aldehyde compound, an unsaturated carboxylic acid compound, and a conjugated diene.
5 . A method for producing at least one of an unsaturated aldehyde compound, an unsaturated carboxylic acid compound, and a conjugated diene using the catalyst according to claim 1 .
6 . The method according to claim 5 , wherein the unsaturated aldehyde compound is acrolein, the unsaturated carboxylic acid compound is acrylic acid, and the conjugated diene is 1,3-butadiene.
7 . An unsaturated aldehyde compound, an unsaturated carboxylic acid compound, or a conjugated diene produced using the catalyst according to claim 1 .