Catalyst for producing unsaturated carboxylic acid
AssigneeNippon Kayaku Kabushiki Kaisha
InventorsShogo YASUDA, Shigeki OKUMURA
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Abstract
The present disclosure relates to a catalyst for producing an unsaturated carboxylic acid having a catalytically active component having a composition represented by the following formula (1) in which the value of the surface roughness S obtained by measuring the surface roughness with a non-contact shape measuring laser microscope is 11.7 μm or more and 25.0 μm or less. (Mo)12(V)a(W)b(Cu)c(Sb)d(X)e(Y)f(Z)g(O)h(1)
Claims7
A catalyst for producing an unsaturated carboxylic acid comprising a catalytically active component with a composition represented by the following formula (1), wherein a value of surface roughness S obtained by measuring a surface roughness of the catalyst with a non-contact shape-measuring laser microscope is 11.7 μm or more and 25.0 μm or less,
- where, in the formula (1), Mo, V, W, Cu, Sb, and O represent molybdenum, vanadium, tungsten, copper, antimony, and oxygen respectively;
- X represents at least one element selected from the group consisting of an alkali metal and thallium;
- Y represents at least one element selected from the group consisting of magnesium, calcium, strontium, barium, and zinc;
- Z represents at least one element selected from the group consisting of niobium, cerium, tin, chromium, manganese, iron, cobalt, samarium, germanium, titanium, and arsenic;
- a, b, c, d, e, f, g, and h represent the atomic ratios of the respective elements;
- a satisfies 0<a≤10.0, b satisfies 0≤b≤10.0, c satisfies 0<c≤6.0, d satisfies 0≤d≤10.0, e satisfies 0≤e≤0.50, f satisfies 0 23f≤1.0, and g satisfies 0≤g<6.0, with respect to molybdenum atom being 12;
- and h is the number of oxygen atoms necessary for satisfying the valence of each component.
Dependencies are inferred from the claim text.