WO2022025675A1 - 프로필렌의 암모산화용 촉매, 이의 제조 방법, 이를 이용한 프로필렌의 암모산화 방법 - Google Patents
프로필렌의 암모산화용 촉매, 이의 제조 방법, 이를 이용한 프로필렌의 암모산화 방법 Download PDFInfo
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- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/85—Chromium, molybdenum or tungsten
- B01J23/88—Molybdenum
- B01J23/887—Molybdenum containing in addition other metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
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- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/08—Silica
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- B01J35/60—Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0221—Coating of particles
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/024—Multiple impregnation or coating
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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- B01J37/0244—Coatings comprising several layers
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- B01J37/088—Decomposition of a metal salt
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C253/00—Preparation of carboxylic acid nitriles
- C07C253/24—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons
- C07C253/26—Preparation of carboxylic acid nitriles by ammoxidation of hydrocarbons or substituted hydrocarbons containing carbon-to-carbon multiple bonds, e.g. unsaturated aldehydes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Definitions
- the present invention relates to a catalyst for ammoxidation of propylene, a method for preparing the same, and a method for ammoxidation of propylene using the same.
- Acrylonitrile (AN) is not only used as one of the raw materials of ABS resin, but also can be applied to various chemical products, so demand and production are increasing worldwide.
- Such acrylonitrile can be prepared through the ammoxidation reaction of propylene.
- the ammoxidation reaction of propylene includes a reduction reaction of ammonia and propylene and a reoxidation reaction by oxygen.
- a fluidized bed reactor is generally used.
- the sol-gel method is widely known as a method for preparing a catalyst for ammoxidation of propylene, which corresponds to a method in which a metal precursor solution and silica sol are co-precipitated, and the co-precipitation product is spray-dried and then calcined.
- a catalyst having a secondary particle structure in which metal oxide particles and silica particles are aggregated is prepared, but the binding force of the primary particles constituting the secondary particles is weak, so that it is worn out in the fluid reactor or split into primary particles. It is easy to lose catalytic activity.
- sites that can participate in the ammoxidation reaction of propylene are limited to the outer surface portion (i.e., the surface of secondary particles) and provide a small surface area, the amount of ammonia desorbed from the catalyst surface during the ammoxidation reaction of propylene is many.
- the metal oxide component particularly, Mo
- the metal oxide component is easily eluted and volatilized at a high temperature (about 400 to 600 ° C.) where the ammoxidation reaction of propylene proceeds, and thus the catalyst performance is easily reduced.
- the present invention provides a catalyst for ammoxidation of propylene that minimizes metal oxide components (especially Mo) eluted and volatilized from the catalyst during the ammoxidation reaction of propylene, and acrylonitrile in a higher yield using this catalyst is for manufacturing.
- metal oxide components especially Mo
- a catalyst for ammoxidation of propylene having a structure in which a molybdenum (Mo) oxide is first supported and a heterogeneous metal oxide including bismuth (Bi) is supported later, and a method for preparing the same provides
- a catalyst for ammoxidation of propylene according to an embodiment of the present invention includes a silica carrier; and a metal oxide supported on the silica carrier,
- a coating layer comprising molybdenum (Mo) oxide; and one or more coating layers located on the coating layer including the molybdenum (Mo) oxide, and including a dissimilar metal; may include:
- A is at least one of Ni, Mn, and Co;
- B is one or more elements of Zn, Mg, Ca, and Ba;
- C is one or more of Li, Na, K, Rb, and Cs,
- D is one or more of Cr, W, B, Al, Ca, and V,
- a to f and x are each a fraction of an atom or group, a is 0.1 to 5, b is 0.1 to 5, c is 0.01 to 10, d is 0.01 to 10, e is 0.01 to 2, , f is 0 to 10, and x is 24 to 48.
- the catalyst for ammoxidation of propylene may be prepared by, for example, a manufacturing method comprising the following steps:
- the elution of molybdenum (Mo) during the ammoxidation reaction of propylene is suppressed and the catalytic performance is reduced by a structure in which molybdenum (Mo) oxide is supported first and a heterogeneous metal oxide is supported later. can be maintained
- acrylonitrile can be mass-produced in high yield without additional supply of catalyst during the ammoxidation process of propylene in the fluidized bed reactor.
- FIG. 1 schematically shows a catalyst prepared using a sol-gel method.
- first, second, etc. may be used to describe various elements, but the elements are not limited by the terms.
- the above terms are used only for the purpose of distinguishing one component from another.
- a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component.
- particle diameter Dv means the particle diameter at the v% point of the cumulative volume distribution according to the particle diameter. That is, D50 is the particle size at the 50% point of the cumulative volume distribution according to the particle size, D90 is the particle size at the 90% point of the cumulative volume distribution according to the particle size, and D10 is the particle size at the 10% point of the cumulative volume distribution according to the particle size. to be.
- pore diameter may mean the length of a straight line passing through the center of the pore.
- the silica carrier may include a plurality of pores, and in this case, the average diameter may be obtained by arithmetic average of the diameters of the plurality of pores.
- the pore diameter and the average pore diameter may be obtained by the Barrett-Joyner-Halenda (BJH) method from the desorption isotherm of nitrogen gas under the liquid nitrogen temperature.
- BJH Barrett-Joyner-Halenda
- ammonia (NH 3 -TPD) which measures the degree of acid site strength of the catalyst by the degree of desorption (TPD: Temperature Programmed Desorption) of ammonia (NH 3 ), is widely known.
- the ammonia (NH 3 ) adsorption amount of the catalyst and the carrier can be measured using the ammonia temperature elevation desorption method (NH 3 -TPD).
- a catalyst for ammoxidation of propylene having a structure in which molybdenum (Mo) oxide is first supported and a heterogeneous metal oxide including bismuth (Bi) is supported later.
- the overall composition satisfies the following Chemical Formula 1, but molybdenum (Mo) is distributed in the lower part (ie, the silica carrier side), and a heterogeneous metal is a metal distributed on the lower part Oxide; this is supported on a silica carrier:
- A is at least one of Ni, Mn, and Co;
- B is one or more elements of Zn, Mg, Ca, and Ba;
- C is one or more of Li, Na, K, Rb, and Cs,
- D is one or more of Cr, W, B, Al, Ca, and V,
- a to f and x are each a fraction of an atom or group, a is 0.1 to 5, b is 0.1 to 5, c is 0.01 to 10, d is 0.01 to 10, e is 0.01 to 2, , f is 0 to 10, and x is 24 to 48.
- a commonly known catalyst for ammoxidation of propylene is prepared by a sol-gel method and provided in a secondary particle structure in which metal oxide nanoparticles and silica nanoparticles are aggregated ( FIG. 1 ).
- it may be prepared by an impregnation method to provide a structure in which a metal oxide is supported on a silica carrier.
- the catalyst prepared by this impregnation method may have less fine powder content and superior durability than a catalyst prepared by the sol-gel method with the same composition, even if a classification process is not performed as a post-processing after preparation.
- molybdenum (Mo) is not sufficiently supported to the inside of the pores of the silica carrier, and the MoO 3 phase increases, so volatilization or loss of molybdenum (Mo) during the ammoxidation reaction of propylene is high. .
- molybdenum (Mo) oxide is first supported on a silica support, and then heterogeneous (including bismuth (Bi) ⁇ species) metal oxides are sequentially supported (FIG. 2).
- a molybdenum (Mo) metal precursor solution for sequential loading of the metal oxide, mixing with a molybdenum (Mo) metal precursor solution, drying, and firing are performed, and then mixing with a heterogeneous metal precursor including bismuth (Bi), drying, and Firing can be performed.
- Mo molybdenum
- Bi bismuth
- the silica carrier and the molybdenum (Mo) precursor solution are mixed and the solvent (ie, water) is removed through a drying process, the molybdenum (Mo) precursor remains on the pore walls of the silica carrier, and the firing process As the molybdenum (Mo) precursor is oxidized, a molybdenum (Mo) oxide film (coating layer) that continuously coats the pore walls of the silica carrier may be formed.
- a bismuth (Bi) and a heterogeneous metal oxide coating layer may be formed.
- the molybdenum (Mo) oxide is supported first and the elution of molybdenum (Mo) during the ammoxidation reaction of propylene has a structure in which a heterogeneous metal oxide including bismuth (Bi) is supported later. suppressed and catalytic performance can be maintained.
- acrylonitrile can be mass-produced in high yield without additional supply of catalyst during the ammoxidation process of propylene in the fluidized bed reactor.
- the catalyst of one embodiment is a catalyst by controlling the metal oxide composition to further include a metal that forms an active site at a suitable level for the ammoxidation reaction of propylene, as well as Mo and Bi, which are known to increase the activity of the ammoxidation reaction. activity can be further increased.
- molybdenum Mo
- bismuth Bi
- dissimilar metal are distributed in the upper part.
- Metal oxide It may have a structure supported on the silica carrier.
- the metal oxide may include a coating layer including molybdenum (Mo) oxide; and one or more coating layers positioned on the coating layer including the molybdenum (Mo) oxide and including a dissimilar metal.
- Mo molybdenum
- the metal oxide may include a coating layer including molybdenum (Mo) oxide; and one or more coating layers positioned on the coating layer including the molybdenum (Mo) oxide and including a dissimilar metal.
- Mo molybdenum
- Bi bismuth
- Fe iron
- element A at least one of Ni, Mn, and Co
- element B among Zn, Mg, Ca, and Ba
- C at least one of Li, Na, K, Rb, and Cs
- the metal oxide supported by dividing into four times a first coating layer containing molybdenum (Mo) oxide; and a second coating layer disposed on the first coating layer and including bismuth (Bi) oxide.
- the overall composition of the coating layers satisfies Chemical Formula 1, and the metals on the upper and lower portions of the adjacent coating layers may be chemically bonded to each other.
- molybdenum (Mo) of the first coating layer can exist in the form of MoO 3 , but it is also combined with bismuth (Bi) of the second coating layer adjacent thereto to form Mo-Bi-O bonds, and molybdenum during the ammoxidation reaction of propylene.
- the probability of volatilization or loss of (Mo) may be reduced.
- the metal oxide is represented by the following Chemical Formula 1-1
- the activity in the ammoxidation reaction of propylene can be higher:
- a to e, and x are each an atom or fraction of an atomic group, a is 0.1 to 5, specifically 0.1 to 2.0, b is 0.1 to 5, specifically 0.5 to 3.0, c is 0.01 to 10, specifically 1 to 10, d is 0.01 to 10, specifically 1 to 10, e is 0.01 to 2, specifically 0.01 to 1.0, and x is 24-48, specifically It may be 28 to 45 days.
- the catalyst of one embodiment may include the metal oxide and the silica carrier in a weight ratio of 15:85 to 35:65, specifically 20:80 to 35:65 (metal oxide:silica carrier).
- the catalyst of one embodiment may have high selectivity of acrylonitrile with high activity.
- the pore diameter of the silica carrier may be 4 nm to 40 nm.
- the diameter is 4 nm or more, 4.2 nm or more, 4.4 nm or more, 4.6 nm or more, 4.8 nm or more, or 5 nm or more, and 40 nm or less, 35 nm or less, 30 nm or less, 25 nm or less, or 20 nm
- the catalyst exhibiting the above-described pore characteristics and ammonia adsorption amount can be implemented.
- the D50 particle diameter of the silica carrier may be in the range of 50 ⁇ m to 150 ⁇ m.
- the silica carrier has a lower limit of 50 ⁇ m or more, 51 ⁇ m or more, 53 ⁇ m or more, or 55 ⁇ m or more of the D50 particle size, and an upper limit of 150 ⁇ m or less, 130 ⁇ m or less, 110 ⁇ m or less, or 90 ⁇ m or less. can do.
- the catalyst of one embodiment may include a silica carrier including a second pore; an inner coating layer continuously coating the wall surfaces of the second pores and including the metal oxide represented by Chemical Formula 1; and a first pore located inside the second pore and occupying an empty space excluding the inner coating layer.
- the diameter of the second pores may be 4 nm to 40 nm, and the first pores may be determined according to the amount of the metal oxide supported in the second pores.
- the inner coating layer as described above, a coating layer comprising molybdenum (Mo) oxide; and one or more coating layers positioned on the coating layer including the molybdenum (Mo) oxide and including a dissimilar metal.
- Mo molybdenum
- acrylonitrile can be obtained in high yield without additional supply of catalyst during the ammoxidation process of propylene in the fluidized bed reactor.
- the catalyst of one embodiment may have an egg-shell structure.
- the silica carrier a non-porous core portion; and a porous shell portion located on the surface of the non-porous core and including second pores having a diameter of 2 to 30 nm.
- the porous shell includes a concave portion and a convex portion of the surface, and the concave portion is formed by opening the second pores to the surface of the porous shell.
- the catalyst of one embodiment may include a coating layer that continuously coats the concave and convex portions of the porous shell and includes a metal oxide represented by Chemical Formula 1; and a first pore occupying an empty space excluding the coating layer in the main portion of the silica carrier.
- the lower limit of the D50 particle size is 30 ⁇ m or more, 35 ⁇ m or more, 40 ⁇ m or more, or 45 ⁇ m or more
- the upper limit is 200 ⁇ m or less, 190 ⁇ m or less, 180 ⁇ m or less, 170 ⁇ m or less, 160 It can be made into micrometer or less, or 150 micrometers or less.
- chemisorption on the catalyst surface tends to increase with increasing temperature, although the rate of adsorption is slower than that of physisorption.
- ammonia (NH 3 -TPD), which measures the degree of acid site strength of the catalyst by the degree of desorption (TPD: Temperature Programmed Desorption) of ammonia (NH 3 ), is widely known.
- the pretreatment of the catalyst is, for example, by filling a catalyst in an apparatus capable of measuring ammonia temperature elevation desorption method, and then using helium gas (50 cc/min) to increase the temperature from room temperature to 10 ° C./min. After raising the temperature to 400 °C, it can be carried out by maintaining the temperature at 400 °C for 1 hour.
- the adsorption amount of NH 3 remaining on the catalyst surface can be obtained.
- the catalyst of one embodiment may have an adsorption amount of ammonia measured by the above method of 0.05 mmol/g or more.
- the catalyst having excellent ammonia adsorption capacity contributes to increasing the conversion rate of propylene and the selectivity of acrylonitrile during ammoxidation of propylene, and ultimately improving the yield of acrylonitrile.
- the adsorption amount of ammonia is 0.5 mmol/g or more, 0.53 mmol/g or more, 0.55 mmol/g or more, or 0.57 mmol/g or more, and 5 mmol/g or less, 4 mmol/g or less, 3 It may be less than or equal to mmol/g, less than or equal to 2 mmol/g, or less than or equal to 1.5 mmol/g.
- the catalyst of one embodiment may have a BET specific surface area of 100 m 2 /g or more while including pores having a diameter of 4 nm or more in a state in which a metal oxide of a specific composition is supported on a silica carrier.
- a site capable of adsorbing ammonia gas and propylene gas may be significantly increased.
- the site capable of participating in the ammoxidation reaction of propylene is limited to the outer surface portion (ie, the surface of secondary particles), whereas the catalyst of one embodiment is the ammoxidation of propylene.
- the surface area that can participate in the reaction extends not only to the outer surface portion (ie, the surface of the catalyst), but also to its inner surface (pores).
- the catalyst of one embodiment has a diameter of 4 nm or more, 4.1 nm or more, 4.2 nm or more, 4.3 nm or more, 4.4 nm or more, or 4.5 nm or more, and 40 nm or less, 35 nm or less, 30 nm or less, 25 It may include pores that are less than or equal to nm, less than or equal to 20 nm, or less than or equal to 15 nm.
- the catalyst of one embodiment has a BET specific surface area of 100 m 2 /g or more, 120 m 2 /g or more, 140 m 2 /g or more, 160 m 2 /g or more, 170 m 2 /g or more, or 175 m 2 /g or less, 300 m 2 /g or less, 270 m 2 /g or less, 250 m 2 /g or less, 230 m 2 /g or less, or 227 m 2 /g or less.
- molybdenum (Mo) oxide is first supported on a silica carrier, and then a heterogeneous metal oxide is supported later, thereby providing a method for preparing the catalyst of the above-described embodiment.
- the metal oxide supported on the silica carrier may include a coating layer including molybdenum (Mo) oxide; and one or more coating layers positioned on the coating layer including the molybdenum (Mo) oxide and including a dissimilar metal; may include:
- A is at least one of Ni, Mn, and Co;
- B is one or more elements of Zn, Mg, Ca, and Ba;
- C is one or more of Li, Na, K, Rb, and Cs,
- D is one or more of Cr, W, B, Al, Ca, and V,
- a to f and x are each a fraction of an atom or group, a is 0.1 to 5, b is 0.1 to 5, c is 0.01 to 10, d is 0.01 to 10, e is 0.01 to 2, , f is 0 to 10, and x is 24 to 48.
- the step of supporting the oxide of the heterogeneous metal on the first catalyst according to the number of times the metal oxide is supported may be performed as follows.
- bismuth (Bi) oxide on the first catalyst iron (Fe) oxide
- element A one or more of Ni, Mn, and Co
- element B one or more of Zn, Mg, Ca, and Ba
- element C Li, Na, K, Rb) , and sequentially supporting an oxide of one or more elements of Cs).
- the supporting of the metal oxide is a series of processes of mixing, drying, and calcining the silica carrier or the catalyst of the previous step with the precursor solution as one set, and two or more sets depending on the desired number of supporting can be composed of
- the silica carrier when supported twice, is mixed with a molybdenum (Mo) precursor solution, dried, and calcined to prepare a first catalyst, and then the first catalyst is mixed with bismuth (Bi), iron (Fe), element A, A final catalyst can be obtained by mixing, drying, and calcining with a mixed solution of the element B and element C precursors.
- Mo molybdenum
- Bi bismuth
- Fe iron
- element A final catalyst can be obtained by mixing, drying, and calcining with a mixed solution of the element B and element C precursors.
- a silica carrier When supported three times, a silica carrier is mixed with a molybdenum (Mo) precursor solution, dried, and calcined to prepare a first catalyst, and the first catalyst is mixed with a bismuth (Bi) and iron (Fe) precursor mixed solution and dried , and calcining to prepare a second catalyst, and then mixing, drying, and calcining the second catalyst with a mixed solution of element A and element B precursors to obtain a final catalyst.
- Mo molybdenum
- Fe iron
- the silica carrier is mixed with a molybdenum (Mo) precursor solution, dried, and calcined to prepare a first catalyst, and the first catalyst is mixed with a bismuth (Bi) precursor solution, dried, and calcined to obtain a second catalyst.
- the second catalyst is mixed with an iron (Fe) precursor solution, dried, and calcined to prepare a third catalyst, and then the third catalyst is mixed with a mixed solution of element A and element B precursor;
- the final catalyst can be obtained by drying and calcining.
- the step of preparing the molybdenum (Mo) precursor solution may be a step of dissolving the Mo precursor in water at 50°C to 80°C.
- the temperature range is sufficient as long as the temperature is sufficient to dissolve the Mo precursor.
- molybdenum precursor for example, a nitrate of molybdenum, an ammonium salt, or an organic complex may be used.
- a water-soluble chelating agent including citric acid, oxalic acid, tartaric acid, hydrogen peroxide, or a combination thereof may be added.
- the additive functions as a strength regulator in the catalyst manufacturing process using the sol-gel method, but in one embodiment serves to make the aqueous solution of the molybdenum (Mo) precursor transparent.
- the weight ratio of the molybdenum precursor and the additive may satisfy 1:0.1 to 1:1, specifically 1:0.2 to 1:0.7, and the solubility of the molybdenum precursor increases within this range. can, but is not limited thereto.
- a precursor solution other than the molybdenum (Mo) precursor solution may vary depending on the desired number of loadings.
- nitrates, acetates, chlorides, hydroxides, etc. of each element may be used as precursors of the elements.
- the manufacturing process of the molybdenum (Mo) precursor solution and other precursor solutions is independent, and the manufacturing order is not limited.
- the compounding ratio of the precursors may be controlled so that the molar ratio of the metal satisfies the stoichiometric molar ratio of Chemical Formula 1, specifically, Chemical Formula 1-1.
- the mixture may be mixed at 20 ° C. to 30 ° C. for 1 hour to 3 hours, and then further mixed at 70 ° C. to 90 ° C. for 1 hour to 3 hours.
- the precursor solution may be continuously distributed in the pores of the silica carrier or the catalyst in the previous step.
- the drying of the silica carrier or the mixture of the catalyst and the precursor solution in the previous step may be performed at 90° C. to 130° C. for 10 hours to 15 hours.
- the solvent ie, water
- the sintering process after the drying process may be performed at 180° C. to 300° C. for 1 hour to 6 hours at the time of firing the molybdenum (Mo) precursor, and at 500° C. to 700° C. when firing the metal other than molybdenum (Mo). It can be carried out for 4 to 8 hours.
- the temperature of the molybdenum (Mo) precursor is too high, exceeding 300 °C, all of the precursors may be converted to the MoO 3 phase, so the temperature during the firing of the molybdenum (Mo) precursor is set to be relatively low, and the subsequent dissimilar metal precursor It is preferable to increase the temperature during firing.
- the precursor mixture is oxidized in a state in which the precursor mixture is continuously distributed in the pores of the silica carrier or the catalyst of the previous step, and can be converted into the metal oxide of Chemical Formula 1 (more specifically, Chemical Formula 1-1). .
- the structure of the catalyst thus formed is as described above.
- a method for ammoxidation of propylene comprising the step of reacting propylene and ammonia in the presence of the catalyst of the embodiment described above.
- the catalyst of one embodiment has high activity and high temperature stability, and may be used for ammoxidation of propylene to increase propylene conversion, acrylonitrile selectivity, and yield.
- Mo precursor solution 30.3 g of a Mo precursor (Ammonium Molybdate) was dissolved in 99 g of water at 80 °C, and 15.13 g of citric acid was added thereto to prepare a Mo precursor solution.
- a Mo precursor Ammonium Molybdate
- Silica (SiO 2 ) particles having a particle size of 50 ⁇ m, a pore diameter of 5.5 nm, a pore volume of 1.2 cm 3 /g according to a nitrogen adsorption method, and a BET specific surface area of 688 m 2 /g were used as a carrier.
- the silica carrier prepared in (2) on which the Mo precursor solution was supported was recovered, dried in an oven at 110 ° C. for 12 hours, and then heat-treated for 6 hours while maintaining a temperature of 200 ° C. in an air atmosphere tubular kiln. , a catalyst in which Mo oxide is supported on a silica carrier (hereinafter, referred to as "Mo/SiO 2 catalyst" in some cases) was obtained.
- the Bi, Fe, Ni, Zn and K precursor mixed solution of (4) was added, and stirred at room temperature and 80 ° C. for 1 hour, respectively, respectively, the Mo / SiO 2 catalyst
- the Bi, Fe, Ni, Zn and K precursor mixed solution was sufficiently supported in the pores.
- the internal pressure of the reactor filled with the quartz fiber and the catalyst was maintained at normal pressure (1 atm), and while the internal temperature of the reactor was raised at a temperature increase rate of 5 ° C./min, nitrogen and ammonia gas were flowed as a pretreatment process. Accordingly, the internal temperature of the reactor was made to reach 400° C., which is the temperature at which the ammoxidation reaction is possible, so that sufficient pretreatment was performed.
- a catalyst of Example 2 ((Mo)/(Bi, Fe, Ni, Zn, K)/SiO 2 catalyst) was prepared in the same manner as in Example 1, except that the silica carrier was changed.
- Example 2 a silica carrier having a larger pore diameter and a smaller surface area than in Example 1 was used. More specifically, silica (SiO 2 ) particles having a particle size of 60 ⁇ m, a pore diameter of 6.0 nm, a pore volume of 0.98 cm 3 /g according to a nitrogen adsorption method, and a BET specific surface area of 645 m 2 /g are supported. was used as
- Example 3 ((Mo)/(Bi, Fe, Ni, Zn and K)/SiO 2 catalyst) was prepared.
- Example 3 the heat treatment temperature was increased by about 30 °C than in Example 1, and heat treatment was performed at about 610 °C.
- Example 4 Except that the number of loadings was changed to 3 times (1 time - Mo, 2 times - Bi and Fe, 3 times - Ni, Zn, and K). A catalyst of Example 4 was prepared in the same manner as in Example 1.
- Bi precursor Bismuth nitrate
- Fe precursor Iron nitrate
- Ni precursor Nickel nitrate
- Zn precursor Zinc nitrate
- K precursor Lithium nitrate
- the Bi and Fe precursor mixed solution was added to the Mo/SiO 2 catalyst prepared in the same manner as in Example 1, and the Bi and Fe precursor solution was supported by sequentially stirring at room temperature and 80° C. for 1 hour, respectively, 110 Dry in an oven at °C for 12 hours, heat treatment for 6 hours while maintaining a temperature of 580 °C in a tubular kiln in an air atmosphere, a catalyst in which Mo oxide and oxides of Bi and Fe are sequentially supported on a silica carrier (hereinafter Thus, "(Mo)/(Bi, Fe)/SiO 2 catalyst”) was obtained.
- the (Mo)/(Bi and Fe)/SiO 2 catalyst was added with the Ni, Zn, and K precursor mixed solution, and the Ni, Zn, and After supporting the K precursor solution, it was dried in an oven at 110 ° C. for 12 hours, and heat-treated for 6 hours while maintaining a temperature of 580 ° C. in an air atmosphere tubular kiln, Mo oxide on a silica carrier; oxides of Bi and Fe; And Ni, Zn, and the catalyst of Example 4 in which oxides of K are sequentially supported (hereinafter, in some cases, "(Mo)/(Bi, Fe)/(Ni, Zn, K)/SiO 2 catalyst" ) was obtained.
- a catalyst of Example 5 was prepared in the same manner as in Example 1, except that the number of loadings was changed to 4 times (1 time-Mo, 2 times-Bi, 3 times-Fe and Ni, 4 times-Zn and K) did
- a Bi precursor solution was prepared by dissolving 5.2 g of a Bi precursor (Bismuth nitrate) in 60 g of water at room temperature, adding 15 g of nitric acid, and stirring for 30 minutes or more to obtain a transparent solution.
- the Bi precursor solution was added to the Mo/SiO 2 catalyst prepared in the same manner as in Example 1, and the Bi precursor solution was supported by stirring at room temperature and 80° C. for 1 hour, respectively, and then in an oven at 110° C. for 12 hours.
- the catalyst hereinafter, in some cases "(Mo)/( Bi)/SiO 2 catalyst”.
- the Fe and Ni precursor mixed solution was added to the (Mo)/(Bi)/SiO 2 catalyst, and the Fe and Ni precursor solutions were supported by sequentially stirring at room temperature and 80° C. for 1 hour, respectively, Drying in an oven at 110 ° C. for 12 hours, heat treatment for 6 hours while maintaining a temperature of 580 ° C. in an air atmosphere tubular kiln, Mo oxide on a silica carrier; Bi oxide; and a catalyst on which oxides of Fe and Ni were sequentially supported (hereinafter, in some cases, referred to as “(Mo)/(Bi)/(Fe, Ni)/SiO 2 catalyst”) was obtained.
- the (Mo)/(Bi)/(Fe, Ni)/SiO 2 catalyst is supported with the Zn and K precursor mixed solution, and then dried and heat-treated to form Mo oxide on the silica carrier; Bi oxide; oxides of Fe and Ni; And the catalyst of Example 5 in which oxides of Zn and K are sequentially supported (hereinafter, in some cases, "(Mo)/(Bi)/(Fe, Ni)/(Zn, K)/SiO 2 catalyst" ) was obtained.
- a catalyst of Example 6 was prepared in the same manner as in Example 1, except that the amount of Bi precursor, Fe precursor, and Ni precursor was changed. Specifically, 8.7 g of Bi precursor (Bismuth nitrate), 8.7 g of Fe precursor (Iron nitrate), and 13.795 g of Ni precursor (Nickel nitrate) were used.
- a catalyst of Example 7 was prepared in the same manner as in Example 1, except that the amount of Bi precursor, Fe precursor, and Ni precursor was changed.
- Bi precursor Bismuth nitrate
- Fe precursor Iron nitrate
- Ni precursor Nickel nitrate
- Mo precursor Ammonium Molybdate
- Oxalic acid 1.1 g
- Bi precursor Bismuth nitrate 1.73 g
- Fe precursor Iron nitrate 2.01 g
- Ni precursor Nickel nitrate 0.6533 g
- Zn precursor Zinc nitrate
- K precursor Potassium nitrate 0.2148 g was dissolved to prepare a mixed solution of Bi, Fe, Ni, Zn, and K precursors.
- the catalyst of Comparative Example 1 was used instead of the catalyst of Example 1, and the ammoxidation process of propylene was performed in the same manner as in Example 1.
- a catalyst of Comparative Example 2 was prepared in the same manner as in Comparative Example 1, except that the amount of silica sol, Bi precursor, Fe precursor, Zn precursor, and K precursor was changed.
- silica sol (LUDOX AS 40, solid content: 40 %, Grace) 34 g, Bi precursor (Bismuth nitrate) 2.1 g, Fe precursor (Iron nitrate) 3.7 g, Zn precursor (Zinc nitrate) 0.63 g, K precursor (Potassium nitrate) 0.36 g was used.
- Comparative Example 3 in the same manner as in Example 1 except that the amount of the Mo precursor was changed and a Bi, Ce, Fe, Mg, and Rb precursor mixed solution was used instead of the Bi, Fe, Ni, Zn and K precursor mixed solution. of the catalyst was prepared.
- Mo precursor solution 18.241 g of the Mo precursor (Molybdenum nitrate) was used.
- Bi precursor Bismuth nitrate
- Ce precursor Cerium nitrate
- Fe precursor Iron nitrate
- Mg precursor Magnetic nitrate
- Rb precursor Rubidum nitrate
- a catalyst of Comparative Example 4 was prepared in the same manner as in Example 1.
- Mo precursor solution 18.241 g of the Mo precursor (Molybdenum nitrate) was used.
- Bi precursor Bismuth nitrate 5.66 g, Fe precursor (Iron nitrate) 8.8 g, Ni precursor (Nickel nitrate) 24.01 g, Zn precursor (Zinc nitrate) 4.95 g, Mn precursor (manganese nitrate) 2.4 g, La precursor (Lantanum nitrate) 1.44 g, Pr precursor (Praseodymium nitrate), K precursor (Potassium nitrate) 0.674 g, and Cs precursor (Cesium) nitrate) 0.325 g was used.
- a catalyst of Comparative Example 5 was prepared in the same manner as in Example 1, except that the amount of the Mo precursor was changed and a Bi precursor solution was used instead of the Bi, Fe, Ni, Zn, and K precursor mixed solution.
- Mo precursor solution 3 g of the Mo precursor (Molybdenum nitrate) was used.
- Bi precursor solution 16 g of Bi precursor (Bismuth nitrate) was used.
- BET specific surface area BET specific surface area for each catalyst of Examples and Comparative Examples was measured using a BET specific surface area measuring instrument (manufacturer: BEL Japan, instrument name: BELSORP_Mini).
- the adsorption amount up to the relative pressure (P/P0) 1 was measured under the liquid nitrogen temperature (77 K), and the desorption amount up to the relative pressure (P/P0) 0.03 was also measured. These measurements were applied to the BJH equation to determine the pore volume, diameter, and surface area of the catalyst.
- Ammonia adsorption amount for each catalyst of Examples and Comparative Examples was measured using a device capable of measuring by ammonia temperature elevation desorption method (NH 3 -TPD) (manufacturer: Micromeritics, device name: Autochem II 2920). .
- NH 3 -TPD ammonia temperature elevation desorption method
- the U-shaped quartz tube in the device is filled with about 0.1 g of catalyst, the U-shaped reactor is connected to the device, and then the temperature is raised from room temperature at a temperature increase rate of 10° C./min using helium gas (50 cc/min). After raising the temperature to about 400 °C, the pretreatment was performed while maintaining the temperature at 400 °C for about 1 hour. This is to remove organic matter remaining in the catalyst.
- NH 3 is adsorbed for 1 hour at about 100° C. with 10% NH 3 /He (50 cc/min). While flowing He at the same temperature, the physically adsorbed NH 3 was removed, and the desorbed NH 3 was measured while the temperature was raised to 800 °C.
- products such as ethylene (ehthlene), hydrogen cyanide, acetaldehyde, acetonitrile, acroleing, and acrylonitrile were analyzed by FID, and TCD was analyzed.
- gas products such as NH 3 , O 2 , CO and CO 2 and unreacted propylene, the number of moles of propylene reacted in Examples and Comparative Examples and the number of moles of ammoxidation products were obtained.
- the catalysts of Examples 1 to 7 prepared by the impregnation method adsorbed a large amount of ammonia compared to the catalysts of Comparative Examples 1 to 3 prepared by the sol-gel method. , it can be seen that it contributed to increasing the conversion rate of propylene and the yield of acrylonitrile according to the ammoxidation reaction of propylene.
- the catalysts of Examples 1 to 7 are prepared in a way that the number of times of supporting the metal oxide is controlled to two or more even in the impregnation method, so that the molybdenum (Mo) oxide is supported first, and the metal oxide of a different type is It can be seen that the elution of molybdenum (Mo) is suppressed during the ammoxidation reaction of propylene as it has a supported structure later.
- Comparative Example 3 including Ce and the like as the active metal; And in the case of Comparative Example 4 containing La, Pr, and the like, the conversion rate of propylene and the yield of acrylonitrile are reduced under the influence of the active metal.
- the catalyst stability is increased by controlling the number of times of supporting the metal oxide, the overall composition of the metal oxide, etc. within the scope of the above-described embodiment, and the conversion rate of propylene, the selectivity of acrylonitrile and the yield are desired. range can be adjusted.
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Abstract
Description
| 제법 | 담지 횟수 | 촉매 분석 결과 | ||||
| 금속 산화물 조성 및 담체와의 배합비 |
기공 직경 (nm) | BET 비표면적 (m2/g) |
암모니아 흡착량 (mmol/g) |
|||
| 실시예 1 | 함침법 | 2회 (Mo - Bi, Fe, Ni, Zn, K) |
Mo12Bi0.75Fe1.3Ni2.5Zn0.3K0.5Oy: 25wt%, SiO2: 75wt% |
8.1 | 217.8 | 0.72 |
| 실시예 2 | 함침법 | 2회(Mo - Bi, Fe, Ni, Zn, K) | Mo12Bi0.75Fe1.3Ni2.5Zn0.3K0.5Oy: 25wt%, SiO2: 75wt% | 8.5 | 210.2 | 0.69 |
| 실시예 3 | 함침법 | 2회(Mo - Bi, Fe, Ni, Zn, K) | Mo12Bi0.75Fe1.3Ni2.5Zn0.3K0.5Oy: 25wt%, SiO2: 75wt% |
8.6 | 196.5 | 0.63 |
| 실시예 4 | 함침법 | 3회(Mo - Bi, Fe - Ni, Zn, K) | Mo12Bi0.75Fe1.3Ni2.5Zn0.3K0.5Oy: 25wt%, SiO2: 75wt% |
7.9 | 225.2 | 0.68 |
| 실시예 5 | 함침법 | 4회(Mo - Bi - Ni, Fe - Zn, K) | Mo12Bi0.75Fe1.3Ni2.5Zn0.3K0.5Oy: 25wt%, SiO2: 75wt% | 9.2 | 178.5 | 0.59 |
| 실시예 6 | 함침법 | 2회(Mo - Bi, Fe, Ni, Zn, K) | Mo12Bi1.25Fe1.5Ni3.5Zn0.3K0.5Oy: 25wt%, SiO2: 75wt% | 8.4 | 213.1 | 0.66 |
| 실시예 7 | 함침법 | 2회(Mo - Bi, Fe, Ni, Zn, K) | Mo12Bi1.25Fe2.0Ni4.0Zn0.3K0.5Oy: 25wt%, SiO2: 75wt% | 8.4 | 212.5 | 0.67 |
| 비교예 1 | 졸겔법 | 1회(Mo, Bi, Fe, Ni, Zn, K) | Mo12Bi0.5Fe0.7Ni0.5Zn0.15K0.3Oy: 50wt%, SiO2: 50wt% | 13.6 | 35.8 | 0.14 |
| 비교예 2 | 졸겔법 | 1회(Mo, Bi, Fe, Ni, Zn, K) | Mo12Bi0.6Fe1.3Ni0.5Zn0.3K0.5Oy: 50wt%, SiO2: 50wt% |
13.8 | 34.6 | 0.14 |
| 비교예 3 | 함침법 | 2회(Mo - Bi, Ce, Fe, Mg, Rb) | Mo12.4Bi0.32Ce0.08Fe1.52Ni6.51Mg2.62Rb0.13: 25wt%, SiO2: 75wt% | 8.2 | 231.8 | 0.40 |
| 비교예 4 | 함침법 | 2회(Mo - Bi, Fe, Ni, Zn, Mn, La, Pr, K, Cs) | Mo12Bi0.7Fe1.3Ni5.5Zn1Mn0.5La0.2Pr0.02K0.4Cs0.1Ox: 25wt%, SiO2: 75wt% |
8.4 | 225.3 | 0.41 |
| 비교예 5 | 함침법 | 2회(Mo- Bi) | Bi2O3·MoO3: 25wt%, SiO2: 75wt% | 8.1 | 226.4 | 0.22 |
| 프로필렌의 암모산화 생성물 | ||||
| 프로필렌 전환율 (%) |
아크릴로니트릴 선택도 (%) |
아크릴로니트릴 수율 (%) |
Mo 감량율 (%) |
|
| 실시예 1 | 87.7 | 75.6 | 66.4 | 0 |
| 실시예 2 | 85.9 | 76.7 | 65.9 | 0 |
| 실시예 3 | 87.4 | 75.9 | 66.3 | 0 |
| 실시예 4 | 87.2 | 74.4 | 64.9 | 0 |
| 실시예 5 | 76.8 | 77.3 | 59.4 | 0 |
| 실시예 6 | 80.6 | 78.4 | 63.2 | 0 |
| 실시예 7 | 79.5 | 78.6 | 62.5 | 0 |
| 비교예 1 | 68.3 | 73.3 | 50.5 | 4.2 |
| 비교예 2 | 64.2 | 75.8 | 48.6 | 4.0 |
| 비교예 3 | 74.3 | 69.5 | 51.6 | 0 |
| 비교예 4 | 15.2 | 62.4 | 9.5 | 0 |
| 비교예 5 | 12.5 | 58 | 7.3 | 10.3 |
Claims (17)
- 실리카 담체; 및 상기 실리카 담체에 담지된 금속 산화물을 포함하는 프로필렌의 암모산화용 촉매로서,상기 금속 산화물은, 전체 조성이 하기 화학식 1을 만족하되,몰리브덴(Mo) 산화물을 포함하는 코팅층; 및 상기 몰리브덴(Mo) 산화물을 포함하는 코팅층 상에 위치하고, 이종(異種) 금속을 포함하는 1층 이상의 코팅층;을 포함하는 것인,프로필렌의 암모산화용 촉매.[화학식 1]Mo12BiaFebAcBdCeDFOx상기 화학식 1에서,A는 Ni, Mn, 및 Co중 하나 이상의 원소이고,B는 Zn, Mg, Ca, 및 Ba 중 하나 이상의 원소이고,C는 Li, Na, K, Rb, 및 Cs 중 하나 이상의 원소이고,D는 Cr, W, B, Al, Ca, 및 V 중 하나 이상의 원소이고,상기 a 내지 f, 및 x는 각각 원자 또는 원자단의 분율이며, a는 0.1 내지 5이고, b는 0.1 내지 5 이고, c는 0.01 내지 10이고, d는 0.01 내지 10이고, e는 0.01 내지 2이며, f는 0 내지 10이고, x는 24 내지 48 이다.
- 제1항에 있어서,상기 금속 산화물은, 전체 조성이 하기 화학식 1을 만족하되,몰리브덴(Mo) 산화물을 포함하는 제1 코팅층; 및 상기 제1 코팅층 상에 위치하고, 비스무스(Bi), 철(Fe), 원소 A(A= Ni, Mn, 및 Co중 하나 이상의 원소), 원소 B(B= Zn, Mg, Ca, 및 Ba 중 하나 이상의 원소), 및 원소 C(C= Li, Na, K, Rb, 및 Cs 중 하나 이상의 원소)의 산화물을 포함하는 제2 코팅층;을 포함하는 것이거나,몰리브덴(Mo) 산화물을 포함하는 제1 코팅층; 및 상기 제1 코팅층 상에 위치하고, 비스무스(Bi) 및 철(Fe)의 산화물을 포함하는 제2 코팅층; 및 상기 제2 코팅층 상에 위치하고, 원소 A(A= Ni, Mn, 및 Co중 하나 이상의 원소), 원소 B(B= Zn, Mg, Ca, 및 Ba 중 하나 이상의 원소), 및 원소 C(C= Li, Na, K, Rb, 및 Cs 중 하나 이상의 원소)의 산화물을 포함하는 제3 코팅층;을 포함하는 것이거나,몰리브덴(Mo) 산화물을 포함하는 제1 코팅층; 및 상기 제1 코팅층 상에 위치하고, 비스무스(Bi) 산화물을 포함하는 제2 코팅층; 상기 제2 코팅층 상에 위치하고, 철(Fe) 산화물을 포함하는 제3 코팅층; 및 상기 제3 코팅층 상에 위치하고, 원소 A(A= Ni, Mn, 및 Co중 하나 이상의 원소), 원소 B(B= Zn, Mg, Ca, 및 Ba 중 하나 이상의 원소), 및 원소 C(C= Li, Na, K, Rb, 및 Cs 중 하나 이상의 원소)의 산화물을 포함하는 제4 코팅층;을 포함하는 것인,프로필렌의 암모산화용 촉매.
- 제1항에 있어서,인접하는 코팅층의 금속들이 서로 화학적으로 결합된 것인,프로필렌의 암모산화용 촉매.
- 제1항에 있어서,상기 촉매는,제2 기공을 포함하는 실리카 담체;상기 제2 기공의 벽면을 연속적으로 코팅하고, 상기 금속 산화물을 포함하는 내부 코팅층; 및상기 제2 기공 내부에 위치하고, 상기 내부 코팅층을 제외한 빈 공간을 차지하는 제1 기공;을 포함하는 것인,프로필렌의 암모산화용 촉매.
- 제1항에 있어서,상기 금속 산화물은, 전체 조성이 하기 화학식 1-1를 만족하는 것인,프로필렌의 암모산화용 촉매:[화학식 1-1]Mo12BiaFebNicZndKeOx상기 화학식 1-1에서, a 내지 e, 및 x의 각 정의는 제1항과 같다.
- 제1항에 있어서,상기 금속 산화물 및 상기 실리카 담체의 중량비는 15:85 내지 35:65인 것인,프로필렌의 암모산화용 촉매.
- 제1항에 있어서,상기 실리카 담체는, 직경이 4 nm 내지 40 nm인 기공을 포함하는 것인,프로필렌의 암모산화용 촉매.
- 제1항에 있어서,상기 촉매는, D50 입경이 50 ㎛ 내지 150 ㎛인 것인,프로필렌의 암모산화용 촉매.
- 제1항에 있어서,상기 촉매는, 직경이 4 nm 내지 40 nm인 기공을 포함하는 것인,프로필렌의 암모산화용 촉매.
- 제1항에 있어서,상기 촉매는, BET 비표면적이 100 m2/g 내지 300 m2/g인 것인,프로필렌의 암모산화용 촉매.
- 제1항에 있어서,상기 촉매는, 암모니아 승온 탈착법(NH3-TPD)으로 측정된 암모니아 흡착량이 0.5 mmol/g 내지 5 mmol/g인 것인,프로필렌의 암모산화용 촉매.
- 실리카 담체에 몰리브덴(Mo) 산화물을 담지시켜, 제1 촉매를 제조하는 단계; 및상기 제1 촉매에 이종(異種) 금속의 산화물을 담지시켜, 전체 조성이 하기 화학식 1을 만족하는 금속 산화물이 실리카 담체에 담지된 촉매를 수득하는 단계;를 포함하는 프로필렌의 암모산화용 촉매의 제조방법으로서,상기 금속 산화물은, 몰리브덴(Mo) 산화물을 포함하는 코팅층; 및 상기 몰리브덴(Mo) 산화물을 포함하는 코팅층 상에 위치하고, 이종(異種) 금속을 포함하는 1층 이상의 코팅층;을 포함하는 것인,프로필렌의 암모산화용 촉매의 제조 방법:[화학식 1]Mo12BiaFebAcBdCeDFOx상기 화학식 1에서,A는 Ni, Mn, 및 Co중 하나 이상의 원소이고,B는 Zn, Mg, Ca, 및 Ba 중 하나 이상의 원소이고,C는 Li, Na, K, Rb, 및 Cs 중 하나 이상의 원소이고,D는 Cr, W, B, Al, Ca, 및 V 중 하나 이상의 원소이고,상기 a 내지 f, 및 x는 각각 원자 또는 원자단의 분율이며, a는 0.1 내지 5이고, b는 0.1 내지 5 이고, c는 0.01 내지 10이고, d는 0.01 내지 10이고, e는 0.01 내지 2이며, f는 0 내지 10이고, x는 24 내지 48 이다.
- 제12항에 있어서,상기 제1 촉매에 이종(異種) 금속의 산화물을 담지시키는 단계는,상기 제1 촉매에 비스무스(Bi), 철(Fe), 원소 A(A= Ni, Mn, 및 Co중 하나 이상의 원소), 원소 B(B= Zn, Mg, Ca, 및 Ba 중 하나 이상의 원소, 및 원소 C(C= Li, Na, K, Rb, 및 Cs 중 하나 이상의 원소)의 산화물을 담지시키는 단계;를 포함하거나,상기 제1 촉매에 비스무스(Bi) 및 철(Fe)의 산화물; 원소 A(A= Ni, Mn, 및 Co중 하나 이상의 원소), 원소 B(B= Zn, Mg, Ca, 및 Ba 중 하나 이상의 원소), 및 원소 C(C= Li, Na, K, Rb, 및 Cs 중 하나 이상의 원소)의 산화물을 순차적으로 담지시키는 단계;를 포함하거나,상기 제1 촉매에 비스무스(Bi) 산화물; 철(Fe) 산화물; 및 원소 A(A= Ni, Mn, 및 Co중 하나 이상의 원소), 원소 B(B= Zn, Mg, Ca, 및 Ba 중 하나 이상의 원소), 및 원소 C(C= Li, Na, K, Rb, 및 Cs 중 하나 이상의 원소)의 산화물을 순차적으로 담지시키는 단계;를 포함하는 것인,프로필렌의 암모산화용 촉매의 제조 방법.
- 제12항에 있어서,상기 제1 촉매를 제조하는 단계는,몰리브덴(Mo) 전구체 용액을 제조하는 단계;상기 실리카 담체와 상기 몰리브덴(Mo) 전구체 용액을 혼합하는 단계;상기 몰리브덴(Mo) 전구체 용액이 담지된 실리카 담체를 건조시켜, 상기 몰리브덴(Mo) 전구체가 담지된 실리카 담체를 수득하는 단계; 및상기 몰리브덴(Mo) 전구체가 담지된 실리카 담체를 소성하는 단계;를 포함하는,프로필렌의 암모산화용 촉매의 제조 방법.
- 제14항에 있어서,상기 건조는 90 ℃ 내지 130 ℃에서 10 내지 15 시간 동안 수행되고,상기 소성은 180 ℃ 내지 300 ℃에서 1 시간 내지 6 시간 동안 수행되는,프로필렌의 암모산화용 촉매의 제조 방법.
- 제12항에 있어서,상기 제1 촉매에 이종(異種) 금속의 산화물을 담지시키는 단계는,이종(異種) 금속의 전구체 용액을 제조하는 단계;이종(異種) 금속의 전구체 용액과 제1 촉매를 혼합하는 단계;상기 혼합물을 90 ℃ 내지 130 ℃에서 10 내지 15 시간 동안 건조하는 단계; 및500 ℃ 내지 700 ℃에서 4 시간 내지 7 시간 동안 소성하는 단계를 포함하는,프로필렌의 암모산화용 촉매의 제조 방법.
- 반응기 내에서, 제1항의 촉매 존재 하에 프로필렌 및 암모니아를 반응시키는 단계를 포함하는,프로필렌의 암모산화 방법.
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| US12226753B2 (en) | 2019-09-30 | 2025-02-18 | Lg Chem, Ltd. | Ammoxidation catalyst for propylene, manufacturing method of the same catalyst, ammoxidation method using the same catalyst |
| KR102519507B1 (ko) * | 2019-09-30 | 2023-04-07 | 주식회사 엘지화학 | 프로필렌의 암모산화용 촉매, 이의 제조 방법, 및 이를 이용한 프로필렌의 암모산화 방법 |
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