WO2004004900A1 - メタクリル酸製造用触媒の製造方法 - Google Patents
メタクリル酸製造用触媒の製造方法 Download PDFInfo
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- WO2004004900A1 WO2004004900A1 PCT/JP2003/008521 JP0308521W WO2004004900A1 WO 2004004900 A1 WO2004004900 A1 WO 2004004900A1 JP 0308521 W JP0308521 W JP 0308521W WO 2004004900 A1 WO2004004900 A1 WO 2004004900A1
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- methacrylic acid
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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
- 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
- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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 referred to as a catalyst for producing methacrylic acid), and a catalyst for producing methacrylic acid. , And a method for producing methacrylic acid.
- Japanese Unexamined Patent Publication No. 2000-29063336 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 mixture is obtained.
- a method for producing a catalyst for producing methacrylic acid by mixing a slurry or a solution containing potassium or the like with the slurry is described.
- the catalyst produced by the method described in this publication may not always have a sufficient yield of methacrylic acid, and further improvement in catalytic performance as an industrial catalyst is desired. Disclosure of the invention
- the present invention relates to a methacrylic acid production catalyst having a high methacrylic acid yield, which is used when methacrylic acid is produced by gas phase catalytic oxidation of methacrolein with molecular oxygen, a method for producing the methacrylic acid, and a method for producing the methacrylic acid. It is an object of the present invention to provide a method for producing methacrylic acid using a catalyst for use.
- the present invention provides a method for producing a methacrylic acid production catalyst having a composition represented by the following formula (1), which is used when methacrylic acid is produced by gas phase catalytic oxidation of methacrolein with molecular oxygen.
- solution A a solution or slurry containing molybdenum atoms, phosphorus atoms and vanadium atoms having an ammonium root content of 0 to 1.5 mol per 12 mol of molybdenum atoms
- solution B slurry containing 6 to 17 moles of ammonium root per 12 moles of molybdenum atoms contained in water
- Solution C a solution or slurry containing Z element
- (P, Mo, V, Cu, and O represent phosphorus, molybdenum, vanadium, copper, and oxygen, respectively, and X is antimony, bismuth, arsenic, germanium, zirconium, tellurium, silver, selenium, gaygen, and tungsten.
- Y represents at least one element selected from the group consisting of iron, zinc, chromium, magnesium, tantalum, cobalt, manganese, barium, gallium, cerium, and lanthanum.
- Z represents at least one element selected from the group consisting of potassium, rubidium, and cesium, and a, b, c, d, e, f, g, and h are atomic ratios of each element.
- solution C it is preferable to mix 5 to 100 parts by mass of solution C with solution A, solution B, or a mixture of solution A and solution B for 0.1 to 30 minutes.
- the solution B is preferably a solution or slurry substantially free of phosphorus, molybdenum, vanadium, copper, element X, element Y and element Z.
- the solution C is preferably a solution or a slurry substantially free of phosphorus, molybdenum, vanadium, copper, element X, element Y and ammonium root.
- the present invention is a catalyst for producing methacrylic acid produced by the above method.
- the present invention is a method for producing methacrylic acid, wherein methacrylic acid is subjected to gas phase catalytic oxidation with molecular oxygen in the presence of the catalyst for producing methacrylic acid.
- a catalyst having a high methacrylic acid yield which is used in producing methacrylic acid by gas phase catalytic oxidation of methacrolein with molecular oxygen, can be obtained.
- the methacrylic acid production catalyst produced in the present invention converts methacrolein to molecular oxygen. It is used for producing methacrylic acid by gas phase catalytic oxidation, and has a composition represented by the following formula (1).
- 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, Y represents at least one element selected from the group consisting of gay, tungsten, and boron, and Y represents iron, zinc, chromium, magnesium, tantalum, konol, manganese, barium, gallium, cerium, and lanthanum.
- Z represents at least one element selected from the group consisting of lithium, rubidium, and cesium.
- a, b, c, d, e, f, g, and h represent the atomic ratio of each element.
- b 12
- a 0.5 to 3
- c 0.01 to 3
- d 0. 01 to 2
- e 0 to 3
- f 0 to 3
- g 0.0 "! ⁇ 3
- h is the atomic ratio of oxygen necessary to satisfy the valence of each component.
- the catalyst for producing methacrylic acid includes a solution or slurry (solution A) containing molybdenum atom, phosphorus atom and vanadium atom having an ammonium root content of 0 to 1.5 mol per 12 mol of molybdenum atom, It is prepared by mixing a solution or slurry containing 6 to 17 moles of ammonium root (solution B) and a solution or slurry containing element Z (solution C) with 12 moles of molybdenum atoms contained in solution A.
- solution A solution or slurry containing molybdenum atom, phosphorus atom and vanadium atom having an ammonium root content of 0 to 1.5 mol per 12 mol of molybdenum atom
- ammonium root refers to ammonia (NH 3 ) which can be ammonium (NH 4 +) or ammonium contained in an ammonium-containing compound such as an ammonium salt.
- Solution A is prepared by dissolving or suspending at least a compound of molybdenum, phosphorus and vanadium in a solvent.
- Solution A may contain copper, X, Y, Z and ammonium roots in addition to molybdenum, phosphorus and vanadium.
- the amount of ammonium root contained in the solution A is 0 to 1.5 mol, preferably 0 to 1.1 mol, per 12 mol of molybdenum atoms. Remove the amount of ammonium root Within this range, a catalyst with a high yield can be obtained. The amount of ammonium root contained in the solution A can be adjusted by the amount of the catalyst raw material containing these and the amount of ammonia used.
- the amount of the Z element contained in the solution A is as small as possible, and it is more preferable that the Z element is not substantially contained.
- an oxide, a nitrate, a carbonate, an ammonium salt or the like of each element can be appropriately selected and used.
- a raw material for molybdenum compounds containing no ammonium such as molybdenum trioxide and molybdic acid are preferable, but various molybdenum such as ammonium paramolybdate, ammonium dimolybdate, and ammonium tetramolybdate are preferable. Acid ammonium can also be used in small amounts.
- phosphorus orthophosphoric acid, phosphorus pentoxide, ammonium phosphate and the like can be used.
- vanadium vanadium pentoxide, ammonium metavanadate and the like can be used.
- a raw material of molybdenum, phosphorus, and vanadium a heteropoly acid such as phosphomolybdic acid, molybdovanadophosphoric acid, and ammonium phosphomolybdate can also be used.
- the raw material of the catalyst component one type may be used for each element, or two or more types may be used in combination.
- Examples of the solvent for the solution A include water, ethyl alcohol, acetone, and the like, and it is preferable to use water.
- the amount of the solvent in the solution A is not particularly limited, but usually, the content ratio (mass ratio) of the molybdenum compound to the solvent in the solution A is preferably 1: 0.1 to 1: 100, and 1: 1. 0.5 to 1: 50 is more preferable. By setting the amount of the solvent within this range, a catalyst with a high yield can be obtained.
- the solution A may be prepared by stirring at room temperature, but is preferably prepared by heating and stirring.
- the heating temperature is preferably at least 80 ° C, more preferably at least 90 ° C. Further, the heating temperature is preferably 150 ° C. or lower, more preferably 130 ° C. or lower. By setting the heating temperature in such a range, a highly active catalyst can be obtained.
- the heating time is preferably at least 0.5 hour, more preferably at least 1 hour. By setting the heating time in such a range, the reaction between the catalyst raw materials can sufficiently proceed.
- the heating time is preferably 24 hours or less, more preferably 12 hours or less.
- Solution B is prepared by dissolving or suspending an ammonium root-containing compound in a solvent.
- Solution B may contain phosphorus, molybdenum, vanadium, copper, X, Y, and Z elements in addition to the ammonium root-containing compound, but these elements are substantially It is preferable not to include it.
- the amount of ammonium root contained in solution B is 6 mol or more, preferably 7 mol or more, based on 12 mol of molybdenum atoms contained in solution A.
- the amount of ammonium root contained in Solution B is 17 mol or less, preferably 15 mol or less, based on 12 mol of molybdenum atoms contained in Solution A.
- the ammonium root-containing compound used for preparing the solution B is ammonia or various ammonium salts, and specific examples thereof include ammonia (aqueous ammonia), ammonium carbonate, ammonium hydrogen carbonate, and ammonium nitrate.
- ammonia aqueous ammonia
- ammonium carbonate aqueous ammonia
- ammonium hydrogen carbonate aqueous ammonia
- ammonium nitrate ammonium root-containing compound
- One kind of the ammonium root-containing compound may be used alone, or two or more kinds may be used in combination.
- Examples of the solvent for the solution B include water, ethyl alcohol, acetone and the like, and it is preferable to use water.
- the amount of the solvent in the solution B is not particularly limited, but usually, the content ratio (mass ratio) of the ammonium root-containing compound to the solvent contained in the solution B is 1: 0.1 to 1: 100. Are preferred, and 1: 0.5 to 1:50 is more preferred. By setting the amount of the solvent in this range, a catalyst with a high yield can be obtained.
- Solution B may be usually prepared by stirring at room temperature, but may be prepared by heating up to about 80 ° C as needed. However, when ammonia water is used as the ammonium root-containing compound as it is, water as a solvent is already contained, and thus such a preparation step is not necessarily required.
- Solution C is prepared by dissolving or suspending at least a compound of element Z in a solvent.
- Liquid C may contain molybdenum atom, phosphorus atom, vanadium atom, copper atom, X element, Y element and ammonium root in addition to Z element, but these elements and ammonium root are substantially It is preferable not to include it.
- cesium is preferable as the Z element because particularly excellent effects can be obtained.
- nitrate, carbonate, hydroxide, etc. of each element are appropriately selected.
- Can be used as a raw material of cesium, cesium nitrate, cesium carbonate, cesium hydroxide and the like can be used.
- the raw material of the catalyst component one type may be used for each element, or two or more types may be used in combination.
- the solvent of the solution C it is preferable to use, for example, water, ethyl alcohol, acetone, and the like.
- the amount of the solvent in the solution C is not particularly limited, but usually, the content ratio (mass ratio) of the molybdenum compound to the solvent in the solution A is preferably 1 : 0.1 to 1: 100, and 1: 0. 5 to 1: 50 is more preferable.
- Solution C is usually prepared by stirring at room temperature, but may be prepared by heating up to about 80 ° C if necessary.
- the method of mixing the liquid A, the liquid B, and the liquid C is not particularly limited.
- a method of mixing the liquid A and the liquid B and the liquid mixture AB and the liquid C, and the liquid A and the liquid C are mixed.
- Any method such as a method of mixing the AC mixed solution and the liquid B, and a method of mixing the BC mixed liquid and the liquid A mixed with the liquid B and the liquid C can be applied.
- a method of mixing a liquid B and a mixed liquid of AC, which is a mixture of liquids A and C is preferable.
- solution B and / or solution C may be divided and mixed twice or more.
- a mixture of solution A and a part of solution C) and solution B, and the remainder of solution C and solution C (a method of mixing C 2 solution), a liquid and B liquid part liquid) and C solution mixed with a beta to include force such as how to mix the remainder ⁇ mixture and solution B (B 2 solution) .
- the ratio of the amount of the catalyst material included in the liquid (B, in the liquid) the amounts and C 2 solution of the catalyst material included in (2 liquid B) (molar ratio), 0: 1 00-100
- the ratio can be changed at an arbitrary ratio of 0: 10, 10: 90 to 90: 10 is preferable, and 20: 80 to 80: 20 is particularly preferable.
- Mixing is usually performed with stirring.
- the amount of the solution B is 5 to 300 parts by mass, preferably 10 to 200 parts by mass, per 100 parts by mass of the solution A.
- the present inventors have found that the time of mixing solution B with other solutions has a great effect on the performance of the produced catalyst, and by specifying this mixing time, a catalyst having a particularly high methacrylic acid yield can be obtained. I found it to be possible. Japanese Patent Application Laid-Open No. 2000-296336 does not discuss this mixing time at all.
- the time for mixing the solution B with the other solution is 0.1 to 15 minutes.
- the mixing time is preferably 0.5 minutes or more, more preferably 1 minute or more.
- the mixing time is preferably 14 minutes or less, more preferably 13 minutes or less.
- the “mixing time” refers to a time during which the entire amount of the solution B is added to the other liquids.
- the mixing time indicates the dropping time, and does not include stirring after dropping. Also, when the liquid B is divided and mixed, the time until the whole amount is mixed, that is, the total of each divided mixing time.
- the amount of the solution C is preferably 5 to 100 parts by mass, more preferably 10 to 70 parts by mass, based on 100 parts by mass of the solution A.
- the time for mixing the liquid C with the other liquid is not particularly limited, but is usually 0.1 to 30 minutes.
- the mixing time is preferably at least 0.5 minute, more preferably at least 1 minute.
- the mixing time is preferably not longer than 28 minutes, more preferably not longer than 25 minutes.
- the mixing time here is also synonymous with the liquid B mixing time described above.
- one prepared solution B and solution Z or C may be divided or may be separately prepared.
- the solution B contains the essential ammonium root and the solution G contains the essential Z element, they may be prepared using the same raw materials, or may be prepared using different raw materials. Is also good.
- the content ratio of the raw material and the content ratio of the solvent contained in each of the divided liquids of the solution B and the solution Z or C may be the same or different.
- the mixed solution of the solution A, the solution B, and the solution C may be prepared at room temperature, or may be prepared by heating.
- the temperature at the time of mixing is preferably 100 ° C. or lower, more preferably 800 ° C. or lower.
- a highly active catalyst can be obtained.
- the heating time is not particularly limited, and may be appropriately determined.
- the copper or the Y element is mixed with the AB mixture obtained by mixing the A liquid and the B liquid, and the obtained liquid mixture and the C liquid are mixed.
- copper or the Y element is added by dissolving or suspending these catalyst raw materials in a solvent.
- a catalyst raw material for the copper and Y elements nitrates, carbonates, hydroxides, and the like of each element can be appropriately selected and used.
- copper nitrate, copper oxide, or the like can be used as a copper raw material.
- the element X When the element X is contained in the catalyst composition, a method of adding a starting compound of the element X to the solution A is preferable.
- a raw material of the element X a nitrate, a carbonate, an oxide, a hydroxide or the like of each element can be appropriately selected and used.
- drying method Various methods can be used as the drying method, and 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, the temperature and time for drying, and the like are not particularly limited, and a dried catalyst precursor can be obtained according to the purpose by appropriately changing the drying conditions.
- the dried product of the catalyst precursor obtained in this manner may be pulverized, if necessary, and then subjected to the subsequent calcination without molding, but usually, the molded product is baked.
- the molding method is not particularly limited, and various known dry and wet molding methods can be applied, but it is preferable that the molding is performed without including a carrier such as silica.
- 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 small amount of a known additive such as graphite or talc may be added.
- the dried product of the catalyst precursor or the molded product obtained in this manner is calcined to obtain a catalyst for producing methacrylic acid.
- the firing method and firing conditions are not particularly limited, and known processing methods and conditions can be applied.
- the optimum conditions for calcination vary depending on the catalyst raw material, catalyst composition, preparation method, etc., but usually, under the flow of an oxygen-containing gas such as air or the flow of an inert gas.
- the reaction is carried out at a temperature of from 00 to 500 ° C., preferably from 300 to 450 ° C., for at least 0.5 hour, preferably from 1 to 40 hours.
- the inert gas refers to a gas that does not decrease the reaction activity of the catalyst, and specific examples include nitrogen, carbon dioxide, helium, and argon.
- the method for producing methacrylic acid of the present invention comprises producing methacrylic acid by gas phase catalytic oxidation of methacrylate with molecular oxygen in the presence of the catalyst of the present invention obtained as described above. .
- the reaction is usually performed on a fixed bed.
- the catalyst layer may be a single layer or two or more layers, and may be one supported on a carrier or one mixed with other additive components.
- a raw material gas containing methacrolein and molecular oxygen is brought into contact with the catalyst.
- Methacrolein concentration in the raw material gas can be varied over a wide range, but usually, 1-2 0 volume 0/0 appropriate ants, 3-1 0% by volume good Li preferred.
- the molecular oxygen concentration in the raw material gas is suitably from 0.4 to 4 mol, more preferably from 0.5 to 3 mol, per mol of methacrolein.
- the source gas may be one obtained by diluting methacrolein and a molecular oxygen source with an inert gas such as nitrogen or carbon dioxide.
- the concentration of water vapor in the raw material gas is preferably 0.1 to 50% by volume, more preferably 1 to 40% by volume.
- the source gas may contain a small amount of impurities such as lower saturated aldehyde, but the amount is preferably as small as possible.
- the reaction pressure for the methacrylic acid production reaction is from normal pressure to several atmospheres.
- the reaction temperature can usually be selected in the range of 230 to 450 ° C, but more preferably 250 to 400 ° C.
- the flow rate of the raw material gas is not particularly limited, it is usually desirable to adjust the flow rate so that the contact time between the raw material gas and the catalyst is preferably 1.5 to 15 seconds, and more preferably 2 to 5 seconds. .
- Parts in Examples and Comparative Examples means parts by mass.
- the composition of the catalyst was determined from the amount of raw materials used for the catalyst components. The analysis of the reaction raw material gas and the product was performed using gas chromatography. In addition, the amounts of ammonia and ammonia contained in the solution were measured by the Kierdahl method.
- 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 solution A was mixed with the solution A for 5.5 minutes with stirring, and stirred for 10 minutes to prepare an AC mixed solution.
- the temperature of the AC mixture was raised to 70 ° C. with stirring, and the B mixture was mixed with the AC mixture for 3 minutes to prepare an ABC mixture, followed by stirring for 90 minutes.
- the slurry containing the catalyst precursor was heated to 101 ° C. and evaporated to dryness with stirring. The obtained solid was dried at 130 ° C. for 16 hours. The dried product was subjected to pressure molding, and then calcined at 380 ° C. for 12 hours under air flow to obtain a catalyst.
- the composition of the resulting catalyst was 1.0 ⁇ 12 V 0 5 CU o 2 F ⁇ O. 05 A so o. 2 CST 2 .
- This catalyst was charged into a reaction tube, and a mixed gas of methacrolein 5%, oxygen 10%, steam 30 o / o, and nitrogen 55% (where “ ⁇ 1 ⁇ 2” is volume%) was added under normal pressure.
- Table 1 shows the reaction results when the reaction was conducted at a reaction temperature of 290 ° C and a contact time of 3.6 seconds.
- Example 4 In Example 3, except that the mixing time of the solution C was changed to 35 minutes, the preparation of the catalyst and the reaction were carried out in the same manner as in Example 3. The results are shown in Table 1.
- Example 1 25.58 parts of 25% by mass aqueous ammonia was used as a concentrate (the amount of ammonium contained in the concentrate was 7.5 mol based on 12 mol of molybdenum atoms contained in the concentrate). ) And B were prepared in the same manner as in Example 1 except that the mixing time of the solution B was changed to 1.5 minutes. The results are shown in Table 1.
- Example 1 55.21 parts of 25 mass% ammonia water was used as solution B (the amount of ammonium contained in solution B was 14.0 with respect to 12 mol of molybdenum atoms contained in solution A). Mol) and B were prepared in the same manner as in Example 1 except that the mixing time of Solution B was 4.0 minutes. The results are shown in Table 1.
- Example 1 A catalyst preparation and a reaction were performed in the same manner as in Example 1 except that the mixing time of the solution B was changed to 0.05 minutes in Example 1. The results are shown in Table 1.
- Example 1 a catalyst was prepared and reacted in the same manner as in Example 1, except that the mixing time of the solution B was changed to 20 minutes. The results are shown in Table 1.
- solution B 45.36 parts of 25 mass% aqueous ammonia was used as solution B.
- the amount of ammonium contained in the solution B was 11.5 mol per 12 mol of molybdenum atoms contained in the solution A.
- the solution A was mixed with the solution A for 2.5 minutes with stirring, and stirred for 10 minutes to prepare an ACI mixed solution.
- the B mixture was mixed with the AC I mixture for 2 minutes to prepare an ABC I mixture, and the mixture was stirred for 10 minutes. Further, the ABC I mixture was mixed with the C solution for 1.5 minutes to prepare an ABC mixture.
- the slurry containing the catalyst precursor was heated to 101 ° C. and evaporated to dryness with stirring.
- the obtained solid was dried at 130 ° C. for 16 hours.
- the dried product was subjected to pressure molding, and then calcined at 375 ° C. for 10 hours under an air flow to obtain a catalyst.
- the composition of the obtained catalyst was ⁇ ⁇ ! ⁇ Mo o ⁇ 2 V 0 u 0. ⁇ , «E 0 n 0 2 C s ⁇ ⁇ !
- Example 9 was the same as Example 9 except that the mixing time of the solution B was changed to 40 minutes. Preparation and reaction of a catalyst were carried out in the same manner as described above. The results are shown in Table 1.
- the solution B was dropped into the solution A over 2.5 minutes with stirring, and stirred for 15 minutes to prepare an AB mixture.
- the amount of ammonium root in the AB mixture was 14 mol per 12 mol of molybdenum atoms.
- a solution of 1.40 parts of cupric nitrate dissolved in 10 parts of pure water, a solution of 2.34 parts of ferric nitrate dissolved in 10 parts of pure water, and 1.00 part of cerium oxide in the AB mixture was added successively, and while this solution was stirred, solution C was added dropwise over 7.5 minutes, and the mixture was stirred for 15 minutes to obtain a slurry.
- the slurry containing the catalyst precursor was heated to 101 ° C. and evaporated to dryness with stirring.
- the obtained solid was dried at 130 ° C for 16 hours, and the dried product was subjected to pressure molding, calcined at 400 ° C for 5 hours under nitrogen flow, and further heated at 340 ° C under air flow. Calcination was performed for 0 hour to obtain a catalyst.
- Example 4 In Example 11, the mixing time of the solution C was changed to 30 minutes, Except that the mixing time was changed to 35 minutes, the catalyst preparation and reaction were carried out in the same manner as in Example 11. The results are shown in Table 1.
- the catalyst for producing methacrylic acid obtained according to the present invention is a catalyst excellent not only in conversion of methacrylic acid as a raw material and in selectivity of methacrylic acid but also particularly in single-stream yield of methacrylic acid.
- such an excellent catalyst can be obtained by an extremely simple method of determining the mixing time of the solution B, so that no major change in the working process is required, and the catalyst can be immediately applied to the current manufacturing process.
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Priority Applications (2)
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US10/519,407 US7625834B2 (en) | 2002-07-05 | 2003-07-04 | Process for producing catalysts for the production of methacrylic acid |
JP2004519265A JP4691359B2 (ja) | 2002-07-05 | 2003-07-04 | メタクリル酸製造用触媒の製造方法 |
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Cited By (11)
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JP2005279488A (ja) * | 2004-03-30 | 2005-10-13 | Sumitomo Chemical Co Ltd | メタクリル酸製造用触媒の製造方法及びメタクリル酸の製造方法 |
JP2006212520A (ja) * | 2005-02-02 | 2006-08-17 | Mitsubishi Rayon Co Ltd | メタクリル酸製造用触媒、その製造方法及びメタクリル酸の製造方法 |
JPWO2005039760A1 (ja) * | 2003-10-27 | 2007-02-22 | 三菱レイヨン株式会社 | メタクリル酸製造用触媒の製造方法、メタクリル酸製造用触媒、メタクリル酸の製造方法 |
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JP2013192989A (ja) * | 2012-03-16 | 2013-09-30 | Mitsubishi Rayon Co Ltd | メタクリル酸製造用触媒の製造方法 |
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 |
CN109641202A (zh) * | 2016-08-22 | 2019-04-16 | 三菱化学株式会社 | 甲基丙烯酸制造用催化剂的制造方法、甲基丙烯酸的制造方法和甲基丙烯酸酯的制造方法 |
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KR100954049B1 (ko) * | 2007-06-13 | 2010-04-20 | 주식회사 엘지화학 | 헤테로폴리산계 촉매의 제조방법 |
US8481448B2 (en) * | 2010-07-19 | 2013-07-09 | Saudi Basic Industries Corporation | Catalyst for oxidation of saturated and unsaturated aldehydes to unsaturated carboxylic acid, method of making and method of using thereof |
EP2825305A1 (en) * | 2012-03-13 | 2015-01-21 | Celanese International Corporation | Catalyst for producing acrylic acid and acrylates comprising vanadium, bismuth and tungsten |
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CN104001542A (zh) * | 2014-06-09 | 2014-08-27 | 中国科学院过程工程研究所 | 一种用于甲基丙烯醛氧化制甲基丙烯酸催化剂的制备方法 |
WO2019208715A1 (ja) * | 2018-04-26 | 2019-10-31 | 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、並びにメタクリル酸及びメタクリル酸エステルの製造方法 |
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JPWO2005039760A1 (ja) * | 2003-10-27 | 2007-02-22 | 三菱レイヨン株式会社 | メタクリル酸製造用触媒の製造方法、メタクリル酸製造用触媒、メタクリル酸の製造方法 |
JP4501494B2 (ja) * | 2004-03-30 | 2010-07-14 | 住友化学株式会社 | メタクリル酸製造用触媒の製造方法及びメタクリル酸の製造方法 |
JP2005279488A (ja) * | 2004-03-30 | 2005-10-13 | Sumitomo Chemical Co Ltd | メタクリル酸製造用触媒の製造方法及びメタクリル酸の製造方法 |
JP2005279487A (ja) * | 2004-03-30 | 2005-10-13 | Sumitomo Chemical Co Ltd | メタクリル酸製造用触媒の製造方法及びメタクリル酸の製造方法 |
JP4501495B2 (ja) * | 2004-03-30 | 2010-07-14 | 住友化学株式会社 | メタクリル酸製造用触媒の製造方法及びメタクリル酸の製造方法 |
JP2006212520A (ja) * | 2005-02-02 | 2006-08-17 | Mitsubishi Rayon Co Ltd | メタクリル酸製造用触媒、その製造方法及びメタクリル酸の製造方法 |
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 |
JP2010119988A (ja) * | 2008-11-21 | 2010-06-03 | Mitsubishi Rayon Co Ltd | メタクリル酸製造用触媒およびその製造方法、ならびにメタクリル酸の製造方法 |
JP2010162460A (ja) * | 2009-01-14 | 2010-07-29 | Mitsubishi Rayon Co Ltd | メタクリル酸合成用触媒の製造方法 |
CN103170362A (zh) * | 2011-12-26 | 2013-06-26 | 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 |
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 |
JP2013192989A (ja) * | 2012-03-16 | 2013-09-30 | Mitsubishi Rayon Co Ltd | メタクリル酸製造用触媒の製造方法 |
CN109641202A (zh) * | 2016-08-22 | 2019-04-16 | 三菱化学株式会社 | 甲基丙烯酸制造用催化剂的制造方法、甲基丙烯酸的制造方法和甲基丙烯酸酯的制造方法 |
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 |
Also Published As
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US20060041168A1 (en) | 2006-02-23 |
CN1662304A (zh) | 2005-08-31 |
CN100563827C (zh) | 2009-12-02 |
JP4691359B2 (ja) | 2011-06-01 |
US7625834B2 (en) | 2009-12-01 |
JPWO2004004900A1 (ja) | 2005-11-04 |
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