Ammoxidation catalyst for propylene, manufacturing method of the same catalyst, ammoxidation method using the same catalyst
Provided is an ammoxidation catalyst for propylene, a manufacturing method of the same, and an ammoxidation method of propylene using the same. Specifically, according to one embodiment of the invention, there is provided a catalyst having a structure in which metal oxide is supported on a silica carrier, having narrow particle size distribution, and having excellent attrition loss. The catalyst may have a D50 particle diameter of 30 to 300 μm, and D10 particle diameter, D50 particle diameter and D90 particle diameter may satisfy the relationship (D90−D10)/D50<2.0. The catalyst may have a chemical formula Mo 12 Bi a Fe b Co c K d O x , where a is 0.1 to 5, b is 0.1 to 5, c is 0.01 to 10, d is 0.01 to 2, and x is 24 to 48.
1. An ammoxidation catalyst for propylene in which metal oxide represented by Chemical Formula 1-1 is supported on a silica carrier,
wherein the silica carrier has D50 of 20 to 400 μm,
wherein the catalyst has
D50 particle diameter of 30 to 300 μm, and
D10 particle diameter, D50 particle diameter and D90 particle diameter satisfying the relationship of the following Formula 1:
( D 90− D 10)/ D 50<2.0 (Formula 1)
Mo 12 Bi a Fe b Co c K d O x (Chemical Formula 1-1)
wherein in the Chemical Formula 1-1, a is 0.1 to 5, b is 0.1 to 5, c is 0.01 to 10, d is 0.01 to 2, and x is 24 to 48.
2. The ammoxidation catalyst for propylene according to claim 1 , wherein the catalyst comprises
the silica carrier comprising first pores;
an internal coating layer that coats wall surfaces of the first pores, and comprises the metal oxide represented by the Chemical Formula 1-1; and
second pores positioned inside of the first pores, and occupying empty spaces except the internal coating layer.
3. The ammoxidation catalyst for propylene according to claim 1 , wherein the catalyst has D50 particle diameter of 45 to 200 μm.
4. The ammoxidation catalyst for propylene according to claim 1 , wherein the catalyst has D10 particle diameter, D50 particle diameter and D90 particle diameter satisfying the relationship of Formula 1-1:
( D 90− D 10)/ D 50≤1.5. (Formula 1-1)
5. The ammoxidation catalyst for propylene according to claim 1 , wherein the weight ratio of the metal oxide and the silica carrier is 15:85 to 35:65.
6. The ammoxidation catalyst for propylene according to claim 1 , wherein the catalyst has attrition loss of 9% or less, said attrition loss being calculated using the following Formula, by filling 50 g of the catalyst (WO) in a vertical inner tube having an inner diameter of 35 mm and a height of 710 mm, flowing N 2 gas at 10 L/min, and then, measuring the amount of the catalyst (W) collected in a fine powder filter, according to ASTM9797-00:
Attrition loss (%)=( W−W 0)/ W.
7. A method for preparing an ammoxidation catalyst for propylene of claim 1 , comprising:
preparing a first precursor solution comprising additives of citric acid, oxalic acid or a mixture thereof; and a Mo precursor,
preparing a second precursor solution comprising a Bi precursor, a Fe precursor, a Co precursor, and a K precursor,
mixing the first and second precursor solutions such that the molar ratio of metals satisfies stoichiometric molar ratio of Chemical Formula 1-1,
supporting the mixture of the first and second precursor solutions on a silica carrier,
drying the silica carrier in which the mixture of the first and second precursor solutions is supported, and
calcining the dried material.
8. The method for preparing an ammoxidation catalyst for propylene according to claim 7 , wherein in the first precursor solution, a weight ratio of the Mo precursor to additives is 1:0.1 to 1:1.
9. The method for preparing an ammoxidation catalyst for propylene according to claim 7 , wherein drying the silica carrier in which a mixture of the first and second precursor solutions is supported comprises:
a first vacuum drying of the silica support on which a mixture of the first and second precursor solutions is supported at 120 to 160 mbar, and
a second vacuum drying of the first vacuum dried material at 30 to 50 mbar, to obtain a silica carrier on which a mixture of the first and second precursor solutions is supported.
10. The method for preparing an ammoxidation catalyst for propylene according to claim 9 , wherein the first vacuum drying is conducted at 60 to 80° C.
11. The method for preparing an ammoxidation catalyst for propylene according to claim 9 , wherein the second vacuum drying is conducted at 80 to 100° C.
12. The method for preparing an ammoxidation catalyst for propylene according to claim 9 , further comprising a third drying the second vacuum dried material at atmospheric pressure.
13. The method for preparing an ammoxidation catalyst for propylene according to claim 12 , wherein the third drying is conducted at 100 to 120° C.
14. The method for preparing an ammoxidation catalyst for propylene according to claim 7 , wherein the calcining of the dried material is conducted at 500 to 700° C.
15. A method for ammoxidation of propylene, comprising a step of reacting propylene and ammonia in the presence of the catalyst of claim 1 , in a reactor.