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US 2026/0061402 A1Published application
Catalyst for producing unsaturated carboxylic acid, method for producing same, and method for producing unsaturated carboxylic acid
AssigneeNippon Kayaku Kabushiki Kaisha
InventorsHideo YOSHIDA, Kento KOHARA
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Abstract
The present invention relates to catalysts for producing an unsaturated carboxylic acid, containing: a catalytically active component represented by the following formula (1), in which the catalysts have a median diameter D50S (mm) 5.0 mm or more and 8.0 mm or less, and a relationship between a specific surface area A (m2/g) and the D50S (mm) is expressed by the following expression (2). (Mo)12(V)a(W)b(Cu)c(Sb)d(X)e(Y)f(Z)g(O)h (1) 8.0≤D50S×A≤20.0 (2).
Claims12
Catalysts for producing an unsaturated carboxylic acid, comprising a catalytically active component represented by the following formula (1), wherein
- the catalysts have a median diameter D50S (mm) 5.0 mm or more and 8.0 mm or less, and
- a relationship between a specific surface area A (m2/g) of the catalysts and the median diameter D50S (mm) of the catalysts is expressed by the following expression (2):
- (
- Mo
- )
- 1
-
- 2
-
- (
- V
- )
- a
-
- (
- W
- )
- b
-
- (
- Cu
- )
- c
-
- (
- Sb
- )
- d
-
- (
- X
- )
- e
-
- (
- Y
- )
- f
-
- (
- Z
- )
- g
-
- (
- O
- )
- h
- (
- 1
- )
- 8.
- ≤
- D
-
- 50
-
- S
- ×
- A
- ≤
- 2
-
- 0
- .
- 0
- (
- 2
- )
- where, 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;
- and 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 indicate an atomic ratio of respective element to a molybdenum atom being 12, and 0<a≤10, 0≤b≤10, 0<c≤6, 0≤d≤10, 0≤e≤0.5, 0≤f≤1, and 0≤g<6;
- and h is the number of oxygen atoms required to satisfy a valence of each component described above.
72 more elements
Dependencies are inferred from the claim text.