Ammoxidation catalyst for propylene, manufacturing method of the same catalyst, ammoxidation method using the same catalyst
There is provided an ammoxidation catalyst for propylene having a structure in which molybdenum (Mo) oxide is supported first, and an oxide of heterogeneous metals including bismuth (Bi) is supported later. Related methods of making and using the catalyst are also provided.
1. An ammoxidation catalyst for propylene comprising:
a silica carrier; and
a metal oxide supported in the silica carrier;
wherein the metal oxide as a whole has a composition satisfying the following Chemical Formula 1, and
comprises a coating layer comprising molybdenum (Mo) oxide, one or more coating layers comprising heterogeneous metals, positioned on the coating layer comprising molybdenum (Mo) oxide-
Mo 12 Bi a Fe b A c B d C e D f O x [Chemical Formula 1]
in the Chemical Formula 1,
A is one or more elements of Ni, Mn, and Co,
B is one or more elements of Zn, Mg, Ca, and Ba,
C is one or more elements of Li, Na, K, Rb, and Cs,
D is one or more elements of Cr, W, B, Al, Ca, and V,
a to f, and x are respectively a fraction of atom and atomic group, a is 0.1 to 5, b is 0.1 to 5, c is 0.01 to 10, dis 0.01 to 10, e is 0.01 to 2, f is 0 to 10, and x is 24 to 48.
2. The ammoxidation catalyst for propylene according to claim 1 ,
wherein the metal oxide as a whole has a composition satisfying the Chemical Formula 1, and
comprises a first coating layer comprising molybdenum (Mo) oxide, and a second coating layer comprising oxide of bismuth (Bi), iron (Fe), element A, wherein A is one or more elements of Ni, Mn, and Co), element B, wherein B is one or more elements of Zn, Mg, Ca, and Ba), and element C, wherein C is one or more elements of Li, Na, K, Rb, and Cs, positioned on the first coating layer, or
comprises a first coating layer comprising molybdenum (Mo) oxide, a second coating layer comprising oxide of bismuth (Bi) and iron (Fe), positioned on the first coating layer, and a third coating layer comprising oxide of element A, wherein A is one or more elements of Ni, Mn, and Co, element B, wherein B is one or more elements of Zn, Mg, Ca, and Ba, and element C, wherein C is one or more elements of Li, Na, K, Rb, and Cs, positioned on the second coating layer, or
comprises a first coating layer comprising molybdenum (Mo) oxide; a second coating layer comprising bismuth (Bi) oxide, positioned on the first coating layer; a third coating layer comprising iron (Fe) oxide, positioned on the second coating layer; and a fourth coating layer comprising oxide of element A, wherein A is one or more elements of Ni, Mn, and Co, element B, wherein B is one or more elements of Zn, Mg, Ca, and Ba, and element C, wherein C is one or more elements of Li, Na, K, Rb, and Cs, positioned on the third coating layer.
3. The ammoxidation catalyst for propylene according to claim 1 , wherein metals of adjoining coating layers are chemically bonded to each other.
4. The ammoxidation catalyst for propylene according to claim 1 , wherein the catalyst comprises:
a silica carrier comprising second pores;
an internal coating layer that continuously coats the wall surfaces of the second pores, and comprises the metal oxide; and
first pores positioned inside the second pores, and occupying empty spaces except the internal coating layer.
5. The ammoxidation catalyst for propylene according to claim 1 , wherein the metal oxide as a whole has a composition satisfying the following Chemical Formula 1-1:
Mo 12 Bi a Fe b Ni c Zn a K c O x [Chemical Formula 1-1]
in the Chemical Formula 1-1, a to e, and x are respectively a fraction of atom and atomic group, a is 0.1 to 5, b is 0.1 to 5, c is 0.01 to 10, dis 0.01 to 10, e is 0.01 to 2, f is 0 to 10, and x is 24 to 48.
6. The ammoxidation catalyst for propylene according to claim 1 , wherein a weight ratio of the metal oxide to the silica carrier is 15:85 to 35:65.
7. The ammoxidation catalyst for propylene according to claim 1 , wherein the silica carrier comprises pores having a diameter of 4 nm to 40 nm.
8. The ammoxidation catalyst for propylene according to claim 1 , wherein the catalyst has a D50 particle diameter of 50 μm to 150 μm.
9. The ammoxidation catalyst for propylene according to claim 1 , wherein the catalyst comprises pores having a diameter of 4 nm to 40 nm.
10. The ammoxidation catalyst for propylene according to claim 1 , wherein the catalyst has a BET specific surface area of 100 m 2 /g to 300 m 2 /g.
11. The ammoxidation catalyst for propylene according to claim 1 , wherein the catalyst has ammonia adsorption amount, measured by ammonia temperature-programmed desorption (NH 3 -TPD), of 0.5 mmol/g to 5 mmol/g.
12. A method for manufacturing an ammoxidation catalyst for propylene comprising steps of:
supporting molybdenum (Mo) oxide in a silica carrier to prepare a first catalyst; and
supporting an oxide of heterogeneous metals in the first catalyst to obtain a catalyst in which metal oxide having a composition as a whole satisfying the following Chemical Formula 1 is supported in the silica carrier,
wherein the metal oxide comprises a coating layer comprising molybdenum (Mo) oxide; and one or more coating layers comprising heterogeneous metals, positioned on the coating layer comprising molybdenum oxide:
Mo 12 Bi a Fe b A c B a C e D f O x [Chemical Formula 1]
in the Chemical Formula 1,
A is one or more elements of Ni, Mn, and Co,
B is one or more elements of Zn, Mg, Ca, and Ba,
C is one or more elements of Li, Na, K, Rb, and Cs,
D is one or more elements of Cr, W, B, Al, Ca, and V,
a to f, and x are respectively a fraction of atom and atomic group, a is 0.1 to 5, b is 0.1 to 5, c is 0.01 to 10, dis 0.01 to 10, e is 0.01 to 2, f is 0 to 10, and x is 24 to 48.
13. The method for manufacturing an ammoxidation catalyst for propylene according to claim 12 ,
wherein the step of supporting the oxide of heterogeneous metals in the first catalyst comprises
supporting oxide of bismuth (Bi), iron (Fe), element A, wherein A is one or more elements of Ni, Mn, and Co, element B, wherein B is one or more elements of Zn, Mg, Ca, and Ba, and element C, wherein C is one or more elements of Li, Na, K, Rb, and Cs, in the first catalyst, or
sequentially supporting an oxide of bismuth (Bi) and iron (Fe, an oxide of element A, wherein A is one or more elements of Ni, Mn, and Co, element B, wherein B is one or more elements of Zn, Mg, Ca, and Ba, and element C, wherein C is one or more elements of Li, Na, K, Rb, and Cs, in the first catalyst, or
sequentially supporting bismuth (Bi) oxide, iron (Fe) oxide, and oxide of element A, wherein A is one or more elements of Ni, Mn, and Co, element B, wherein B is one or more elements of Zn, Mg, Ca, and Ba, and element C, wherein C is one or more elements of Li, Na, K, Rb, and Cs, in the first catalyst.
14. The method for manufacturing an ammoxidation catalyst for propylene according to claim 12 ,
wherein the step of preparing the first catalyst comprises steps of:
preparing a molybdenum (Mo) precursor solution;
mixing the silica carrier with the molybdenum (Mo) precursor solution;
drying the silica carrier in which the molybdenum (Mo) precursor solution is supported to obtain a silica carrier in which the molybdenum (Mo) precursor is supported; and
calcining the silica carrier in which the molybdenum (Mo) precursor is supported.
15. The method for manufacturing an ammoxidation catalyst for propylene according to claim 14 ,
wherein the drying is conducted at 90° C. to 130° C. for 10 to 15 hours, and
the calcination is conducted at 180° C. to 300° C. for 1 hour to 6 hours.
16. The method for manufacturing an ammoxidation catalyst for propylene according to claim 12 ,
wherein the step of supporting the oxide of heterogeneous metals in the first catalyst comprises steps of:
preparing a precursor solution of the heterogeneous metals;
mixing the precursor solution of the heterogeneous metals with the first catalyst;
drying the mixture at 90° C. to 130° C. for 10 to 15 hours; and
calcining at 500° C. to 700° C. for 4 to 7 hours.
17. 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.