WO2005039760A1 - メタクリル酸製造用触媒の製造方法、メタクリル酸製造用触媒、メタクリル酸の製造方法 - Google Patents
メタクリル酸製造用触媒の製造方法、メタクリル酸製造用触媒、メタクリル酸の製造方法 Download PDFInfo
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- WO2005039760A1 WO2005039760A1 PCT/JP2004/015893 JP2004015893W WO2005039760A1 WO 2005039760 A1 WO2005039760 A1 WO 2005039760A1 JP 2004015893 W JP2004015893 W JP 2004015893W WO 2005039760 A1 WO2005039760 A1 WO 2005039760A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/23—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups
- C07C51/235—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of oxygen-containing groups to carboxyl groups of —CHO groups or primary alcohol groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—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
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—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
- 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
- B01J23/8877—Vanadium, tantalum, niobium or polonium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/14—Phosphorus; Compounds thereof
- B01J27/186—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J27/195—Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with vanadium, niobium or tantalum
- B01J27/198—Vanadium
- B01J27/199—Vanadium with chromium, molybdenum, tungsten or polonium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0236—Drying, e.g. preparing a suspension, adding a soluble salt and drying
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/04—Mixing
Definitions
- the present invention relates to a method for producing a catalyst used for producing methacrylic acid by gas phase catalytic oxidation of methacrolein with molecular oxygen (hereinafter, may be referred to as a catalyst for producing methacrylic acid).
- the present invention relates to a catalyst for producing methacrylic acid and a method for producing methacrylic acid.
- Patent Document 1 discloses a homogeneous solution containing molybdenum, vanadium, phosphorus, and at least one element selected from the group consisting of antimony, copper, and one or more elements selected from potassium, rubidium, cesium, and thallium. Disclosed is a method for preparing a catalyst by mixing a homogeneous solution containing an element, a homogeneous solution containing at least one selected element such as tungsten, beryllium, and magnesium with ammonia, if necessary, and drying the product. Have been.
- Patent Document 2 discloses that a solution or slurry containing at least molybdenum, phosphorus and vanadium and a solution or slurry containing an ammonia compound are mixed, and the resulting mixed solution or mixed slurry contains potassium or the like.
- a method for producing a catalyst for producing methacrylic acid comprising a step of mixing a solution or a slurry, is disclosed.
- ammonia water is dropped into a liquid containing molybdenum, phosphorus and vanadium to mix them.
- Patent Document 1 JP-A-5-31368
- Patent Document 2 JP-A-2000-296336
- the present invention provides a catalyst for producing methacrylic acid having a high yield, a method for producing the same, and a catalyst for producing the same.
- An object of the present invention is to provide a method for producing methacrylic acid used.
- P, Mo, V, Cu and O represent phosphorus, molybdenum, vanadium, copper and oxygen, respectively, and X represents antimony, bismuth, arsenic, germanium, zirconium, tellurium, Represents at least one element selected from the group consisting of silver, selenium, silicon, tungsten and boron, and Y represents iron, zinc, chromium, magnesium, tantalum, cobalt, manganese, barium, gallium, cerium and lanthanum.
- Z denotes at least one element selected from the group consisting of at least one element selected from the group consisting of potassium, rubidium and cesium.
- a, b, c, d, e, f, g and h represent the atomic ratio of each element.
- b 12
- d 0.01 1-2
- h is necessary to satisfy the valence of each component Atomic ratio of oxygen.
- the method for producing methacrylic acid production catalyst of the present invention to introduce the LA solution with stirring PR solution was charged to the tank A at a stirring power 0. 01-3. 5kWZm 3 It is characterized by Further, in the method for producing a catalyst for producing methacrylic acid according to the present invention, the LA liquid is supplied when the PR liquid charged into the A tank has a liquid level force of 0.05 to 2 m. It is characterized by being
- the present invention that has solved the above-mentioned problems is a catalyst for producing methacrylic acid produced by the method of the present invention.
- the present invention which has solved the above-mentioned problems, is a method for producing methacrylic acid in which gas phase catalytic oxidation of methacrolein with molecular oxygen in the presence of the catalyst for producing methacrylic acid of the present invention.
- a method for producing a catalyst for producing methacrylic acid by subjecting methacrolein to gas-phase contact with molecular oxygen to produce methacrylic acid. It is possible to provide a method for producing methacrylic acid, which can produce acrylic acid.
- the catalyst for producing methacrylic acid which can be produced by the method for producing a catalyst of the present invention is used for producing methacrylic acid by subjecting methacrolein to gas-phase contact oxidation with molecular oxygen.
- P, Mo, V, Cu and O represent phosphorus, molybdenum, vanadium, copper and oxygen, respectively, and X represents antimony, bismuth, arsenic, germanium, zirconium, tellurium, silver, selenium, and silicon.
- Z represents at least one element selected from the group consisting of potassium, rubidium and cesium.
- a, b, c, d, e, f, g, and h represent the atomic ratio of each element.
- the method for producing a catalyst for producing methacrylic acid of the present invention comprises: (i) at least molybdenum, phosphorus and (Ii) a solution or slurry containing ammonium and vanadium (solution I), (ii) a solution or slurry containing ammonium root (solution II), and (iii) a solution or slurry containing the solution I or II.
- One of the solutions (sometimes referred to as PR solution) is charged into a tank (sometimes referred to as tank A), and the total area of the PR liquid in tank A is reduced to 0%.
- LA liquid a step of introducing the other liquid (may be referred to as LA liquid) into a continuous liquid surface area having an area of 10% to prepare a liquid I liquid II liquid mixture;
- the solution or slurry containing the catalyst precursor containing the catalyst component is dried, and the obtained dried catalyst precursor is calcined (“drying and firing the obtained dried catalyst precursor” is “dry”). Firing in some cases).
- ammo-pum root refers to an ammo-pum (NH +)
- Ammonium contained in ammonium-containing compounds such as your (NH 3) or ammonium salt
- the tank used for preparing the solutions I and II and the tank A used for mixing the two solutions are not particularly limited, and a conventionally known tank can be used. It can be used preferably.
- the tank may be equipped with a stirrer, baffle plate, jacket or coil for heat exchange.
- stirrer known stirring blades such as paddle blades, propeller blades, turbine blades, flat blades, and curved blades can be used in one stage, or the same blade or different types of blades can be used in two or more stages in the vertical direction.
- so-called large wings such as a screw anchor and Max Blend (registered trademark, manufactured by Sumitomo Heavy Industries, Ltd.) can also be used.
- Solution I is prepared by dissolving or suspending at least a raw material such as a compound of molybdenum, phosphorus and vanadium in a solvent.
- Solution I may contain, in addition to molybdenum, phosphorus and vanadium, copper, the above-mentioned element X, the above-mentioned element Y, a compound of the above-mentioned element ⁇ , and a compound containing an ammonium root.
- the amount of the ammonium root contained in the solution I is not particularly limited, but is preferably 0-1.5 molar force S, and more preferably 0-1.0 mol, with respect to 12 mol of molybdenum. When the amount of ammonium root is within this range, a catalyst having a high methacrylic acid yield can be obtained.
- the amount of ammonium root contained in Solution I can be adjusted by the amount of the compound containing it and the amount of ammonia used [0021]
- Examples of raw materials used for preparing the solution I include oxides, nitrates, carbonates, and ammonium salts of the above-mentioned elements. Any of these compounds can be appropriately selected and used in the preparation of solution I.
- the compound of molybdenum compounds containing no ammonium such as molybdenum trioxide and molybdic acid are preferable, but ammonium molybdate paramolybdate, ammonium molybdate, and tetramolybdate are preferred. Various types of ammonium molybdate such as ammonium can also be used if they are in small amounts.
- the phosphorus compound orthophosphoric acid, phosphorus pentoxide, ammonium phosphate or the like can be used.
- the vanadium compound vanadium pentoxide, ammonium metavanadate, and the like can be used.
- a heteropoly acid such as phosphomolybdic acid, molybdovanadophosphoric acid, and ammonium limolybdate can also be used.
- Examples of the solvent that can be used for preparing the solution I include water, ethyl alcohol, and acetone, and it is preferable to use water.
- the amount of the solvent in the solution I is not particularly limited, it is usually preferable that the content ratio (mass ratio) of the molybdenum conjugate and the solvent contained in the solution I is 1: 0.1 to 1: 100. It is more preferable that the ratio be 1: 0.5-1: 50.
- the amount of the solvent is in this range, a catalyst with a high methacrylic acid yield can be obtained.
- Solution I can be prepared by mixing the above compound used as a raw material with a solvent and stirring or dissolving or suspending the compound at room temperature to form a solution or slurry.
- the heating temperature is preferably 80 ° C. or higher, more preferably 90 ° C. or higher.
- the heating temperature is usually preferably 150 ° C or lower, more preferably 130 ° C or lower. When the heating temperature is in such a range, a highly active catalyst can be obtained.
- the heating time is preferably 0.5 hour or more, more preferably 1 hour or more. In addition, the heating time is usually preferably 24 hours or less, more preferably 12 hours or less.
- the compound of element Z is mixed with a solvent and dissolved or suspended to prepare a solution or slurry (sometimes referred to as a liquid), which contains molybdenum, phosphorus, and vanadium. Preferably, it is added to the solution or slurry.
- the temperature of the solution or slurry is preferably set to 80 ° C or lower, more preferably 30 to 70 ° C. Cesium is preferred as the element Z because of its particularly excellent effect.
- cesium nitrate, cesium carbonate, cesium hydroxide and the like can be used as the cesium compound used as a raw material in the preparation of solution I.
- cesium compound one type may be used alone, or two or more types may be used in combination.
- Solution II can be prepared by dissolving or suspending a compound containing an ammonium root in a solvent.
- Solution II may contain compounds of phosphorus, molybdenum, vanadium, copper, element X, element Y and element Z in addition to the compound containing the ammonium root. Those not substantially contained are preferred.
- the amount of the ammonium root contained in the solution II is not particularly limited, but is preferably 6 mol or more with respect to 12 mol of molybdenum contained in the solution I, more preferably 7 mol or more. Is more preferred.
- the amount of ammonium root contained in the solution II is preferably 17 mol or less, more preferably 15 mol or less, with respect to 12 mol of molybdenum contained in the solution I. When the amount of ammonium root is within this range, a catalyst with a high methacrylic acid yield can be obtained.
- ammonia and ammonium salts Compounds containing an ammonium root that can be used for preparing the solution II are ammonia and ammonium salts. Specifically, ammonia (aqueous ammonia), ammonium carbonate, ammonium hydrogencarbonate, ammonium nitrate and the like can be exemplified. The compound containing the ammonium root may be used alone or in combination of two or more.
- a solvent that can be used for preparing the solution II for example, water, ethyl alcohol, acetone, and the like can be mentioned. Usually, water is preferably used.
- the amount of the solvent in the solution II is not particularly limited, but usually, the content ratio (mass ratio) of the compound containing the ammonium root in the solution to the solvent (mass ratio) is 1: 0.1 to 1: 100. It is more preferable to set the ratio to 1: 0.5-1: 50. When the amount of the solvent is within this range, a catalyst having a high methacrylic acid yield can be obtained. Can be obtained.
- Solution II is usually prepared by adding a compound containing an ammonium root to a solvent and stirring or dissolving or suspending at room temperature to prepare a solution or slurry. If necessary, it can be prepared by heating to around 80 ° C. However, when ammonia water is used as it is as a compound containing an ammonium root, such a preparation step is not necessarily required since water as a solvent is already contained.
- either one of the liquids I and II (PR liquid) is charged into a tank (A tank), and the other liquid (LA liquid) is charged into a tank A to mix both liquids. Mix.
- PR liquid liquid
- LA liquid liquid
- the LA liquid has a continuous liquid surface area of 0.01-10% of the total surface area of the PR liquid charged in the A tank, preferably a continuous liquid area of 0.05-5%. It is important that the liquid is supplied to the liquid level area.
- LA solution when put into tank A stir the PR liquid which is charged to tank A power 0. 01-3. 5kW Zm 3 in in the preferred instrument 0. 05- 3kWZm 3 and stirring It is more preferable to stir. It is presumed that by performing the stirring of the PR solution within the above-mentioned range of stirring power, a crystal structure effective for methacroleic acid is formed, and the methacrylic acid yield of the obtained catalyst is improved.
- the LA liquid when the LA liquid is charged into the A tank, it is preferable that the LA liquid is charged from a height of 0.05 to 2 m of the liquid level of the PR liquid charged in the A tank. Masumagu 0.1-1. It is more preferable to supply LA liquid with a height of 5 m. If the height at which the LA liquid is introduced is set to 0.05 m or more, and the liquid surface force of the PR liquid is set to 0.05 m or more, the PR liquid will not come into contact with the LA liquid inlet even if the PR liquid is stirred.
- the method of introducing the LA liquid into the A tank is not particularly limited, but the LA liquid is naturally dropped from above or beside the A tank through the tank power pipe, or is injected. Examples include a method of quantitatively sending a solution by a pump or the like.
- the number of inlets for introducing the LA liquid into the A tank is not particularly limited.
- the LA liquid is injected into a continuous liquid surface area of the liquid I liquid and the liquid II charged in the tank A. In this case, there may be only one input port or multiple input ports. It is preferable that the number of inlets is usually one.
- the PR solution may be the I solution and the LA solution may be the II solution, or the PR solution may be the I solution and the LA solution may be the I solution. it can.
- the LA liquid may be divided into two or more portions and charged.
- the temperature of the LA solution and the PR solution when the LA solution is introduced is not particularly limited, but is usually preferably 100 ° C or lower, more preferably 80 ° C or lower, and usually preferably room temperature or higher.
- the LA solution can be charged while stirring the LA solution.
- solution III a solution or slurry (solution III) containing a compound of element Z may be added after preparing the mixed solution of solution I and solution II without element Z by the method described above.
- the method of charging the liquid III is not particularly limited.
- a method of charging the liquid III to the liquid I liquid II mixture, a method of charging the liquid I liquid II mixed liquid to the liquid III, or a method of charging liquids III and I A method such as a method of simultaneously introducing the liquid II liquid mixture and the like can be adopted.
- the solution or slurry containing the catalyst precursor containing all the catalyst components is prepared by mixing solution I and solution II (if desired, further the solution III) at room temperature, and heating the mixture. May be prepared.
- the temperature at the time of mixing is preferably 100 ° C. or lower, more preferably 80 ° C. or lower, and is usually preferably room temperature or higher.
- a highly active catalyst can be obtained by mixing the solution I and the solution (and, if desired, the solution A) at a solution temperature in such a range to prepare a solution or slurry containing a catalyst precursor. .
- the mixing is usually performed with stirring. Further, the mixing time is not particularly limited, and may be appropriately determined.
- the method for drying the solution or slurry of the catalyst precursor is not particularly limited, and various methods may be used. Can be. For example, an evaporation to dryness method, a spray drying method, a drum drying method, a flash drying method and the like can be used.
- the type of dryer used for drying and the temperature and time for drying are not particularly limited, and a dried product of the catalyst precursor according to the purpose can be obtained by appropriately changing the drying conditions.
- the dried catalyst precursor thus obtained can be pulverized, if necessary, and then calcined to prepare a catalyst.
- a dried product of the catalyst precursor may be preliminarily molded and calcined, or it may be calcined without molding. Usually, it is preferable to prepare a molded article and calcine it to prepare a catalyst.
- the molding method is not particularly limited, and various known dry and wet molding methods can be applied. It can also be formed using a carrier such as silica. Usually, a method of forming without using a carrier is preferred. Specific molding methods include, for example, tablet molding, press molding, extrusion molding, and granulation molding.
- the shape of the molded product is not particularly limited, either. For example, a desired shape such as a columnar shape, a ring shape, and a spherical shape can be selected.
- a known additive for example, graphite, talc or the like may be added in a small amount.
- the catalyst precursor for methacrylic acid production is prepared by calcining the dried catalyst precursor obtained in this manner or the molded article thereof.
- the firing method and firing conditions are not particularly limited, and known firing methods and firing conditions can be applied.
- the optimal conditions for calcination vary depending on the catalyst raw material, catalyst composition, preparation method, etc., but the usual calcination conditions are those under the flow of an oxygen-containing gas such as air or the flow of an inert gas at a calcination temperature of 200 to 500 ° C. C, preferably at 300-450 ° C., the calcination time is 0.5 hours or more, preferably 114 hours.
- the inert gas means a gas that does not decrease the reaction activity of the catalyst. Specific examples of such a gas include nitrogen, carbon dioxide, helium, and argon.
- the method for producing methacrylic acid of the present invention is a method for producing methacrylic acid by subjecting methacrolein to gas-phase catalytic oxidation with molecular oxygen in the presence of the catalyst of the present invention obtained as described above. is there.
- a raw material gas containing methacrolein and molecular oxygen is brought into contact with a catalyst.
- the methacrolein concentration in the source gas can be varied over a wide range. Usually, the methacrolein concentration is 1 to 20% by volume, particularly preferably 3 to 10% by volume.
- the raw material gas may contain a small amount of impurities such as lower saturated aldehydes, but it is preferable that the amount be as small as possible!
- air as the molecular oxygen source.
- air enriched with pure oxygen or the like can be used.
- the molecular oxygen in the raw material gas is usually from 0.4 to 4 mol, and particularly preferably from 0.5 to 3 mol, per 1 mol of methacrolein.
- the source gas may be diluted by adding an inert gas such as nitrogen or carbon dioxide. Further, water vapor may be added to the raw material gas.
- the water vapor concentration in the raw material gas is usually 0.1 to 50% by volume, and particularly preferably 110 to 40% by volume.
- the gas phase contact reaction of methacrolein is usually performed in a fixed bed.
- the catalyst layer may be a single layer or two or more layers.
- the catalyst may be supported on a carrier or may be a mixture of other components.
- the reaction pressure is preferably from normal pressure to several atmospheres.
- the reaction temperature can usually be selected in the range of 230-450 ° C. Especially 250-400 ° C force S is preferable.
- the flow rate of the raw material gas is not particularly limited, it is generally preferable that the flow rate is such that the contact time is 1.5 to 15 seconds, and particularly preferably the flow rate is 2 to 5 seconds.
- the mechanism for improving the catalyst performance in the method for producing methacrylic acid of the present invention is not clear, but as described above, the vicinity of the mixing portion of the solution I and the solution II when the LA solution is added to the PR solution.
- the local pH distribution of methacrylic acid is effective to form a crystal structure effective for the production of catacroleic acid. ⁇ It is presumed that a crystal structure that can be obtained at a high yield is formed.
- the composition of the catalyst was determined from the charged amount of the catalyst raw material.
- the analysis of the raw material gas and the reaction product in the production of methacrylic acid was performed using gas chromatography. Based on the obtained analysis results, the conversion rate of methacrolein (sometimes referred to as MAL conversion rate), the selectivity of the generated methacrylic acid (sometimes referred to as MAA selectivity), the conversion of methacrylic acid
- the flow yield (sometimes referred to as MAA yield) was determined by the following equation.
- Methacrylic acid selectivity (%) (C / B) x 100
- A is the number of moles of supplied methacrolein
- B is the number of moles of reacted methacrolein
- C is the number of moles of methacrylic acid generated.
- the liquid into which the LA liquid is injected with respect to the entire area of the PR liquid surface (may be expressed as S)
- the percentage of the surface area (S) was determined by the following equation.
- the total surface area of the PR solution (S) was determined by the following equation.
- Ratio (%) of the area of the liquid surface area into which the LA liquid has been input to the total area of the liquid surface of the PR liquid (S / S) x 100
- the slurry containing the catalyst precursor was heated to 10 C and evaporated to dryness with stirring.
- the obtained solid was dried at 130 ° C. for 16 hours to obtain a dried product.
- the obtained dried product was molded under pressure, and calcined at 380 ° C. for 12 hours under flowing air to obtain a catalyst.
- the composition of the obtained catalyst was PMoVCuFeCs.
- This catalyst was charged into a reaction tube, and a mixed gas containing 5% by volume of methacrolein, 10% by volume of oxygen, 30% by volume of steam, and 55% by volume of nitrogen was reacted under normal pressure at a reaction temperature of 290 ° C and a contact time of 3.6 seconds. The reaction was carried out. The results are shown in Table 1.
- Example 1 a catalyst preparation and reaction were carried out in the same manner as in Example 1 except that a charging Loca LA solution ( ⁇ solution) having a diameter of 40 mm was charged into the PR solution (I solution) in the A tank. The result was 3 ⁇ 4kl.
- Example 1 a catalyst preparation and reaction were carried out in the same manner as in Example 1 except that a supplied Loca LA solution ( ⁇ solution) having a diameter of 100 mm was charged into the PR solution (solution I) in the A tank. Table 1 shows the results.
- Example 1 except that the agitation power of the PR liquid and 4. OkWZm 3 was subjected to catalyst preparation and reaction in the same manner as in Example 1. The results are shown in Table 1.
- Example 1 the catalyst preparation and reaction were carried out in the same manner as in Example 1 except that the LA solution (solution) was also charged into the PR solution (solution I) in the A tank, and the loca with a diameter of 150 mm was also introduced. Table 1 shows the results.
- Example 1 the catalyst preparation and reaction were performed in the same manner as in Example 1 except that the LA solution was also introduced into the PR solution (I solution) in the A tank, and the Loca with a diameter of 2 mm was also introduced.
- the results are shown in Table 1. Indicated.
- a tank 100 kg of pure water is charged into a tank type reaction tank (A tank) having a diameter of 650 mm and an internal volume of 250 L at room temperature, and stirred with a paddle two-stage blade 50 g of molybdenum molybdenum 50 kg, 2.67 kg of 85 mass% phosphoric acid 2.67 kg, 1.84 kg of vanadium oxide and 5.48 kg of a 60% arsenic acid aqueous solution were added, and the mixture was heated to 98 ° C and heated and stirred at 98 ° C for 5 hours.
- a tank tank type reaction tank having a diameter of 650 mm and an internal volume of 250 L at room temperature
- a tank type reaction tank (B tank) having an internal volume of 100 L was charged with 18.1 kg of 25 mass% ammonia water at room temperature to obtain a second liquid.
- a solution (solution III) obtained by dissolving 6.18 kg of cesium bicarbonate in 15 kg of pure water was added to the mixed solution of Solution I and Solution II maintained at 30 ° C to obtain a slurry containing a catalyst precursor. .
- the obtained solid was dried at 130 ° C for 16 hours. After the obtained solid was molded under pressure, it was calcined at 380 ° C. for 12 hours under air flow to obtain a catalyst.
- the composition of the resulting catalyst is PM
- Example 5 the catalyst preparation and reaction were performed in the same manner as in Example 5, except that a 2.5 m-high Loca LA solution ( ⁇ solution) was charged into the PR solution (solution I) in the A tank.
- ⁇ solution 2.5 m-high Loca LA solution
- solution I PR solution
- Example 5 the PR solution (I solution) in the A tank was placed at two locations from the two 50 mm diameter inlets (interval 500 mm) installed at 180 ° around the entire surface of the A tank. Catalyst preparation and reaction were carried out in the same manner as in Example 5, except that the LA solution ( ⁇ solution) was charged into each of the substantially circular liquid surface areas. Table 1 shows the obtained results.
- the method for producing a catalyst for producing methacrylic acid of the present invention and the catalyst produced by the method are suitable for the method for producing methacrylic acid in which gas phase catalytic oxidation of methacrolein with molecular oxygen, including the method for producing methacrylic acid of the present invention.
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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Abstract
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2004800318004A CN1874842B (zh) | 2003-10-27 | 2004-10-27 | 甲基丙烯酸制备用催化剂的制备方法、甲基丙烯酸制备用催化剂、甲基丙烯酸的制备方法 |
| US10/577,136 US7662742B2 (en) | 2003-10-27 | 2004-10-27 | Process for producing catalyst for methacrylic acid production, catalyst for methacrylic acid production, and process for producing methacrylic acid |
| JP2005509257A JP4922614B2 (ja) | 2003-10-27 | 2004-10-27 | メタクリル酸製造用触媒の製造方法 |
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| JP2003-365984 | 2003-10-27 | ||
| JP2003365984 | 2003-10-27 |
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| WO2005039760A1 true WO2005039760A1 (ja) | 2005-05-06 |
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| PCT/JP2004/015893 Ceased WO2005039760A1 (ja) | 2003-10-27 | 2004-10-27 | メタクリル酸製造用触媒の製造方法、メタクリル酸製造用触媒、メタクリル酸の製造方法 |
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| Country | Link |
|---|---|
| US (1) | US7662742B2 (ja) |
| JP (1) | JP4922614B2 (ja) |
| KR (1) | KR100896379B1 (ja) |
| CN (1) | CN1874842B (ja) |
| SG (1) | SG156608A1 (ja) |
| WO (1) | WO2005039760A1 (ja) |
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| JP2007098345A (ja) * | 2005-10-07 | 2007-04-19 | Mitsubishi Rayon Co Ltd | メタクリル酸製造用触媒及びその製造方法、並びにその触媒を用いたメタクリル酸の製造方法 |
| JP2007117818A (ja) * | 2005-10-26 | 2007-05-17 | Asahi Kasei Chemicals Corp | 酸化物触媒の製造方法 |
| JP2009148728A (ja) * | 2007-12-21 | 2009-07-09 | Mitsubishi Rayon Co Ltd | メタクリル酸製造用触媒およびメタクリル酸の製造方法 |
| US7625834B2 (en) * | 2002-07-05 | 2009-12-01 | Mitsubishi Rayon Co., Ltd. | Process for producing catalysts for the production of methacrylic acid |
| WO2013172414A1 (ja) | 2012-05-18 | 2013-11-21 | 日本化薬株式会社 | メタクリル酸製造用触媒、その製造方法及び該触媒を用いるメタクリル酸の製造方法 |
| WO2018037998A1 (ja) * | 2016-08-22 | 2018-03-01 | 三菱ケミカル株式会社 | メタクリル酸製造用触媒の製造方法、メタクリル酸の製造方法およびメタクリル酸エステルの製造方法 |
| JP2019504760A (ja) * | 2016-11-16 | 2019-02-21 | エルジー・ケム・リミテッド | 触媒の製造方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7557061B2 (en) * | 2004-06-28 | 2009-07-07 | Mitsubishi Rayon Co., Ltd. | Process for producing catalyst for methacrylic acid synthesis |
| WO2009099043A1 (ja) * | 2008-02-04 | 2009-08-13 | Mitsubishi Rayon Co., Ltd. | メタクリル酸製造用触媒およびその製造方法、並びにメタクリル酸の製造方法 |
| CN103170362B (zh) * | 2011-12-26 | 2015-07-15 | 上海华谊丙烯酸有限公司 | 一种杂多酸催化剂及其制备方法和用途 |
| CN103831131B (zh) | 2012-11-21 | 2016-04-06 | 上海华谊丙烯酸有限公司 | 催化剂、其制备方法和用途 |
| JP6341094B2 (ja) * | 2013-09-11 | 2018-06-13 | 三菱ケミカル株式会社 | メタクリル酸製造用触媒の製造方法 |
| MY192057A (en) * | 2017-02-17 | 2022-07-25 | Mitsubishi Chem Corp | Catalyst for production of methacrylic acid, catalyst precursor for production of methacrylic acid, method for producing said catalyst and catalyst precursor, method for producing methacrylic acid, and method for producing methacrylate ester |
| SG11202009571VA (en) * | 2018-04-26 | 2020-10-29 | Mitsubishi Chem Corp | Method for producing catalyst for methacrylic-acid production and methods for producing methacrylic acid and methacryic ester |
| WO2021141122A1 (ja) * | 2020-01-08 | 2021-07-15 | 三菱ケミカル株式会社 | メタクリル酸製造用触媒の製造方法、メタクリル酸の製造方法およびメタクリル酸エステルの製造方法、並びにメタクリル酸製造用触媒の製造装置 |
| KR102795505B1 (ko) * | 2020-10-16 | 2025-04-11 | 주식회사 엘지화학 | 몰리브덴-비스무트계 복합 금속 산화물의 제조방법 |
| US20250196112A1 (en) * | 2023-01-19 | 2025-06-19 | Lg Chem, Ltd. | Catalyst for producing (meth)acrylic acid, and method for producing catalyst for producing (meth)acrylic acid |
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- 2004-10-27 US US10/577,136 patent/US7662742B2/en not_active Expired - Lifetime
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- 2004-10-27 CN CN2004800318004A patent/CN1874842B/zh not_active Expired - Lifetime
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| US7625834B2 (en) * | 2002-07-05 | 2009-12-01 | Mitsubishi Rayon Co., Ltd. | Process for producing catalysts for the production of methacrylic acid |
| JP2007098345A (ja) * | 2005-10-07 | 2007-04-19 | Mitsubishi Rayon Co Ltd | メタクリル酸製造用触媒及びその製造方法、並びにその触媒を用いたメタクリル酸の製造方法 |
| JP2007117818A (ja) * | 2005-10-26 | 2007-05-17 | Asahi Kasei Chemicals Corp | 酸化物触媒の製造方法 |
| JP2009148728A (ja) * | 2007-12-21 | 2009-07-09 | Mitsubishi Rayon Co Ltd | メタクリル酸製造用触媒およびメタクリル酸の製造方法 |
| WO2013172414A1 (ja) | 2012-05-18 | 2013-11-21 | 日本化薬株式会社 | メタクリル酸製造用触媒、その製造方法及び該触媒を用いるメタクリル酸の製造方法 |
| JPWO2013172414A1 (ja) * | 2012-05-18 | 2016-01-12 | 日本化薬株式会社 | メタクリル酸製造用触媒、その製造方法及び該触媒を用いるメタクリル酸の製造方法 |
| WO2018037998A1 (ja) * | 2016-08-22 | 2018-03-01 | 三菱ケミカル株式会社 | メタクリル酸製造用触媒の製造方法、メタクリル酸の製造方法およびメタクリル酸エステルの製造方法 |
| JPWO2018037998A1 (ja) * | 2016-08-22 | 2018-08-23 | 三菱ケミカル株式会社 | メタクリル酸製造用触媒の製造方法、メタクリル酸の製造方法およびメタクリル酸エステルの製造方法 |
| KR20190039262A (ko) | 2016-08-22 | 2019-04-10 | 미쯔비시 케미컬 주식회사 | 메타크릴산 제조용 촉매의 제조 방법, 메타크릴산의 제조 방법 및 메타크릴산 에스터의 제조 방법 |
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| JP2019504760A (ja) * | 2016-11-16 | 2019-02-21 | エルジー・ケム・リミテッド | 触媒の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| SG156608A1 (en) | 2009-11-26 |
| KR20060076320A (ko) | 2006-07-04 |
| CN1874842B (zh) | 2011-06-22 |
| KR100896379B1 (ko) | 2009-05-08 |
| JP4922614B2 (ja) | 2012-04-25 |
| US20070032679A1 (en) | 2007-02-08 |
| US7662742B2 (en) | 2010-02-16 |
| CN1874842A (zh) | 2006-12-06 |
| JPWO2005039760A1 (ja) | 2007-02-22 |
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