WO2005058496A1 - 複合酸化物触媒の製造方法 - Google Patents
複合酸化物触媒の製造方法 Download PDFInfo
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- WO2005058496A1 WO2005058496A1 PCT/JP2004/013525 JP2004013525W WO2005058496A1 WO 2005058496 A1 WO2005058496 A1 WO 2005058496A1 JP 2004013525 W JP2004013525 W JP 2004013525W WO 2005058496 A1 WO2005058496 A1 WO 2005058496A1
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- catalyst
- composite oxide
- oxide catalyst
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- solid substance
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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
- B01J23/8876—Arsenic, antimony or bismuth
-
- 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
-
- 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
Definitions
- the present invention relates to a process for producing a composite oxide catalyst containing molybdenum as a main component and a method for producing a composite oxide catalyst using a discharged solid material containing a catalyst component as a raw material.
- the raw material is a solid substance containing the catalyst component discharged from the production process of the composite oxide catalyst for producing the corresponding unsaturated aldehyde and / or unsaturated carboxylic acid by gas phase catalytic oxidation with the molecular oxygen-containing gas.
- a method for producing a composite oxide catalyst used in the same production process is a solid substance containing the catalyst component discharged from the production process of the composite oxide catalyst for producing the corresponding unsaturated aldehyde and / or unsaturated carboxylic acid by gas phase catalytic oxidation with the molecular oxygen-containing gas.
- a process for producing the corresponding unsaturated aldehyde and Z or unsaturated rubonic acid by gas-phase catalytic oxidation reaction of olefin, or a process for producing an unsaturated carboxylic acid by gas-phase catalytic oxidation reaction of unsaturated aldehyde The composite oxide catalyst containing molybdenum as a main component, which is used in the above, has already been industrially used. If the catalyst is manufactured industrially, it shall be based on the provisions of the Industrial Safety and Health Act and the Industrial Safety and Health Act, and shall be subject to the measures to prevent the emission of dust and the Air Pollution Control Law specified in the Dust Prevention Regulations.
- the composite oxide catalyst used in the above-described production process needs to be filled with a catalyst conforming to a predetermined standard such as the shape “mass” strength in a reactor for performing gas phase catalytic oxidation. For this reason, those catalysts or catalyst precursors that have been generated during the production of the catalyst and that are out of specification are separated and removed from the good catalysts that meet the specifications.
- Patent Document 1 discloses that molybdenum oxide contained in a spent catalyst is converted into molybdic acid vapor by contacting steam or a gas containing water vapor at 500 to 800 ° C, and then the molybdic acid vapor is cooled to 500 ° C or lower.
- a method is disclosed in which the solution is cooled and precipitated as molybdenum oxide or molybdic acid and recovered.
- Patent Literature 2 discloses a catalyst component characterized by having a process of chlorinating a catalyst component in a spent catalyst with a chlorinating agent to generate a steam of vanadium tetrachloride and a process of generating a vapor of molybdenum pentachloride. Recovery techniques are disclosed.
- Patent Document 1 JP-A-10-202114
- Patent Document 2 JP 2001-72422 A
- the present invention includes a catalyst component discharged from a process for producing a molybdenum-based composite oxide catalyst such as dust or a nonstandard catalyst precursor or a catalyst discharged from the above-described process for producing a catalyst.
- An object of the present invention is to provide a method for producing a composite oxide catalyst using a solid substance effectively without discarding and using the solid substance as a raw material.
- the present invention particularly relates to a composite oxide catalyst for producing an unsaturated aldehyde and Z or an unsaturated carboxylic acid by subjecting an olefin or an unsaturated aldehyde to gas-phase catalytic oxidation with a molecular oxygen-containing gas.
- Manufacturing process power Solid substances containing exhausted catalyst components
- the present inventor has conducted intensive studies to achieve the above object.
- a solid substance containing a catalyst component discharged from the process of producing a molybdenum-based composite oxide catalyst was used as a catalyst raw material.
- the activity of the obtained catalyst depends on the process of producing the catalyst from the solid material as a raw material, which is discharged.
- the present invention has found a method for obtaining a catalyst having characteristics comparable to those obtained by using a novel catalyst raw material when using the solid substance discharged from any of the processes as a raw material.
- the solid substance after adjusting the particle size of a solid substance containing a catalyst component discharged from a catalyst manufacturing process, the solid substance is dispersed in water to form a slurry, and the slurry is dried to obtain a powder.
- a catalyst having almost the same properties as in the case of using a novel catalyst raw material in terms of activity and practical mechanical strength is produced.
- the solid material discharged from the catalyst manufacturing process is discharged before the firing process in a series of catalyst manufacturing processes.
- the solid substance is a solid substance
- a highly active catalyst can be obtained.
- a solid substance discharged from the calcination process of the catalyst is used as a raw material, it is difficult to obtain a catalyst having high activity.
- the inventor of the present invention has proposed that a new catalyst can also be used in this case by mixing the solid substance discharged after the calcination step with the solid substance discharged before the calcination step.
- the present inventors have found a method for obtaining a catalyst having an activity almost equal to that of a catalyst using a raw material.
- the present invention has a gist having a configuration having the following features.
- the slurry is produced by dispersing in water to produce a slurry.
- the solid substance containing the catalyst component to be discharged is the solid substance discharged from the step before the step of firing the compact, and the step after the step of firing the compact.
- X represents at least one element selected from the group consisting of Na, K, Rb, Cs and T1
- Y represents at least one element selected from the group consisting of B, P, As and W.
- Z is a group force consisting of Mg, Ca, Zn, Ce and Sm forces, and at least one element is selected
- Q is a halogen atom
- a to k are atomic ratios of the respective elements.
- the complex oxide catalyst mainly comprising molybdenum is used for producing an unsaturated carboxylic acid by subjecting an unsaturated aldehyde to gas-phase catalytic oxidation with a molecular oxygen-containing gas to produce an unsaturated carboxylic acid.
- X represents at least one element selected from the group consisting of W and Nb; Y represents at least one element also selected from the group force consisting of Fe, Co, Ni, and Bi; Represents at least one element selected from the group consisting of Ti, Zr, Ce, Cr, Mn, and Sb.
- a, b, c, d, e, f, and g represent the atomic ratio of each element. When a is 12, b is 1 to 12, c is 0 to 6, d is 0 to 12, and e is 0 to 12. 100 and f are 0-100, and g is the number of oxygen atoms necessary to satisfy the valence of each component.
- the process of producing a composite oxide catalyst mainly composed of molybdenum such as dust and non-standard catalyst precursors or catalysts discharged from the above-described catalyst production process is performed.
- the present invention provides a method for producing a composite oxide catalyst using a solid substance as a raw material by effectively utilizing the solid substance contained therein without discarding the solid substance.
- the present invention is particularly directed to a composite oxide catalyst for producing the corresponding unsaturated aldehyde and Z or unsaturated carboxylic acid by subjecting the olefin or unsaturated aldehyde to gas-phase catalytic oxidation with a molecular oxygen-containing gas.
- a method for producing a composite oxide catalyst having an activity equivalent to that obtained from a novel raw material using a solid substance containing a catalyst component discharged from the production process as a raw material is provided.
- the composite oxide catalyst targeted in the present invention is a catalyst containing molybdenum as a main component, and includes catalysts used for various reactions.
- olefins such as propylene and isobutylene are subjected to a gas-phase catalytic oxidation reaction with a molecular oxygen-containing gas to react with corresponding unsaturated aldehydes such as acrolein and methacrolein and unsaturated carboxylic acids such as acrylic acid and methacrylic acid.
- the present invention provides the following formula (1), which is used when producing olefins by gas phase catalytic oxidation with a molecular oxygen-containing gas to produce unsaturated aldehydes and unsaturated carboxylic acids. Are preferred.
- Mo molybdenum
- Bi bismuth
- Co konorelate
- Ni nickel
- Fe iron
- Si silicon
- O oxygen
- X Na, K, Rb, Cs and T1.
- Group power represents at least one element selected
- Y represents at least one element selected from the group consisting of B, P, As and W
- Z represents Mg, Ca, Zn, Ce and Sm
- Q represents a halogen atom such as chlorine, etc.
- a to k represent atoms it of each element, and when a force is 2, b is 0.
- c is 0—10
- d is 0—10
- a catalyst having the following formula (2), which is used when an unsaturated aldehyde is produced by gas phase catalytic oxidation with a molecular oxygen-containing gas to produce an unsaturated carboxylic acid is suitable. I will.
- Mo molybdenum
- V vanadium
- Cu copper
- O oxygen
- X at least one element selected from the group consisting of W and Nb
- Y represents Fe
- Co Group power consisting of Ni
- Bi represents at least one element selected from the group consisting of Z
- Z represents at least one element selected from the group consisting of Ti, Zr, Ce, Cr, Mn and Sb.
- a, b, c, d, e, f, and g represent the atomic ratio of each element.
- b is 1-12
- c 0-6, d is 0-12
- e 0-100
- F is 0-100
- g is the number of oxygen atoms required to satisfy the valence of each component.
- a solid material discharged from the process of producing a composite oxide catalyst mainly containing molybdenum as described above is used as a catalyst raw material.
- the production process of these catalysts is usually a production process of a slurry containing a catalyst component, a drying process of drying the slurry to obtain a powder, a molding process of obtaining a molded body from the powder, and firing the molded body. It includes a calcination process and a catalyst inspection and sorting process.
- the powder collected by the dust collector is collected in the drying process, the powder collected in the dust collector and the molded product having an irregular shape are formed in the forming process, and the fired product is filled into the firing box and the fired product is formed in the firing process.
- the powder collected by the dust collector when removing In the inspection and sorting process, non-standard or cracked catalysts and powder catalysts collected by dust collectors in this process are collected as solid substances each containing a catalyst component.
- any of the solid materials containing the recovered catalyst component can be produced as catalysts having excellent performance.
- the solid materials before and after the calcination process are used as raw materials. Since the obtained catalysts have different performances, it is preferable to store them separately.
- a method for producing a composite oxide catalyst using a solid substance containing a powerful catalyst component as a raw material will be described in detail below.
- the solid material containing the catalyst component As a raw material for the composite oxide catalyst, it is preferable that the solid material that is not in the form of powder is ground.
- the pulverization method it is possible to adopt various methods such as using a hammer mill, impeller mill, turbo mill, zegomil, roller mill, etc.
- the average particle diameter after force pulverization is 5 / im-100 / im, More preferably, it is 10 ⁇ m-60 / im. When it has such an average particle diameter, sedimentation of solids in the slurry obtained by slurrying can be suppressed.
- the optimal particle size depends on the subsequent process. If the subsequent molding process is continued, the handling and flowability of the particles during molding are improved, and the secondary In order to maintain the structure, it is preferable that the average particle size is about 20 ⁇ m to 60 ⁇ m, and that the amount of fine powder of less than 10 / im is as small as possible.
- a catalyst having high performance can be produced using a solid substance which is discharged in any process by vigorous slurrying.
- the slurry concentration if the concentration is too high, the handleability decreases, and if the concentration is too low, the energy cost is increased in the drying process and the economic efficiency deteriorates. Therefore, usually, the weight of the solid content / the slurry weight in the slurry is preferable. It is preferably from 20 to 70% by weight, particularly preferably from 30 to 50% by weight.
- an organic binder it is preferable to add an organic binder to improve the dispersibility of the slurry or to maintain the particle shape when the slurry is dried.
- organic binders can be used.
- water-soluble polymers such as polybutyl alcohol and various celluloses can be used.
- the addition amount of the organic binder is preferably 0.5 to 5% by weight based on the pulverized particles. More preferably, it is 13 to 13% by weight. If the addition amount is too small, the effect of the addition is insufficient and if it is too large, abnormal heating may occur in the firing process.
- various methods such as an evaporation to dryness method, a drum drying method, a spray drying method, and a flash drying method can be used.
- a spray drying method using a spray dryer or the like is employed. Drying is preferably performed almost instantaneously at 100-200 ° C.
- various methods can be used, and tablet compression molding, extrusion molding and the like are preferable.
- the organic binder include various kinds of forces S, preferably, water-soluble polymers such as polyvinyl alcohol and various celluloses described above.
- the amount of the organic binder to be added is preferably 110 parts by weight to 100 parts by weight of the particles, more preferably 2 to 6 parts by weight. If the amount of the organic binder is too small, the effect of the addition is not sufficient, and if the amount is too large, there is a possibility that abnormal heat generation may occur during the firing process.
- An arbitrary shape such as a spherical shape, a columnar shape, and a ring shape can be selected for the molded body.
- the calcination is performed under conditions suitable for the catalyst. For example, in the case of a catalyst used in a process for producing olefin and a corresponding unsaturated aldehyde and Z or unsaturated carboxylic acid by subjecting olefin to a gas phase catalytic oxidation reaction, it is preferable to carry out the reaction under an air stream, 400-600 ° C. More preferably, the baking temperature is 420-550 ° C. If the firing temperature is too low, the thermal diffusion of the molybdenum element is insufficient, and if it is too high, the molybdenum element may be lost by sublimation.
- an unsaturated aldehyde is produced by a gas phase catalytic oxidation reaction of an unsaturated aldehyde to produce an unsaturated carboxylic acid.
- the catalyst used 250 ° C-450 ° C, more preferably 350 ° C in an inert gas atmosphere containing 5% or less molecular oxygen.
- C one 400.
- the firing temperature is too low, the molybdenum element may be lost by sublimation if the thermal diffusion of the molybdenum element is too high.
- the content of oxygen in the atmosphere gas exceeds 5% by volume, the activity of the catalyst may be insufficient.
- the oxygen content may be 0, but is preferably 0.05% by volume or more.
- the oxygen content is 0.1-2% by volume when no organic binder is used, and 0.5-4.5% by volume when it is used.
- an organic binder is added during the molding process, abnormal heat generation may occur during the firing process. Therefore, when the temperature is increased, the force for maintaining the temperature at a lower temperature or the rate of temperature increase is appropriately controlled. That power S desiring.
- the solid oxide composite oxide catalyst containing the catalyst component can be produced by the method of the present invention.
- the solid substance is produced by the calcination step in a series of catalyst production steps. If the solid substance is discharged from the previous step, a highly active catalyst can be obtained, but if the solid substance discharged from the process power after the calcination step of the catalyst is used as the raw material, the activity becomes higher. It is difficult to obtain a high catalyst or a catalyst with high mechanical strength.
- the solid substance discharged from the step after the above-mentioned firing step is not isolated, and is mixed with the solid substance discharged from the previous step of the firing step to produce the solid substance. It has been found that the activity and mechanical strength of the resulting catalyst are improved. The mechanism by which the activity and strength of the catalyst are improved is not clear, but it is believed that the catalyst structure undergoes some changes through the firing process.
- the solid substance discharged from the mixture before the step of firing the former molded body in the mixture is mixed.
- the content of solid substances discharged from the process is preferably 50% by weight or more. When the content is less than 50% by weight, the mechanical strength of the obtained catalyst is low, and a practically usable catalyst cannot be obtained.
- the content of the solid substance discharged from the step before the step of firing the compact is particularly preferably 70% by weight or more.
- the composite oxide catalyst thus produced according to the present invention is a novel starting material especially when used in the same reaction process as the catalyst in the production process in which the solid substance as the raw material is produced. It can have activity and mechanical strength comparable to that of the produced composite oxide catalyst. Therefore, the catalyst prepared according to the present invention can be handled and used in the same manner as a composite oxide prepared from a novel raw material.
- the vertical force of a stainless steel pipe with an inner diameter of 25 mm and a length of 5 m also drops the catalyst lOOg and is received by a stainless steel plate with a thickness of 2 mm. Then, the weight of the catalyst remaining on the sieve was measured.
- the definition of the drop strength is as follows.
- the average particle diameter was measured using a laser diffraction 'scattering particle size distribution analyzer (manufactured by Seishin Enterprise Co., Ltd., LMS-24).
- a method for preparing a molybdenum-based composite oxide catalyst used in the process of producing the corresponding unsaturated aldehyde and / or unsaturated rubonic acid by subjecting propylene to a gas phase catalytic oxidation reaction is described below.
- Acrylic acid yield (mol%) (number of moles of acrylic acid generated) / number of propylene monoles supplied) x 100
- 3000 g of the compact A obtained in Catalyst Preparation Method 1 was dry-pulverized using a hammer mill to obtain pulverized particles.
- the average particle size of the pulverized particles was 60 ⁇ m.
- aqueous slurry 800 g was added to 890 ml of pure water to obtain an aqueous slurry.
- the aqueous slurry was dried with a spray dryer while controlling the outlet temperature to 140 ° C.
- the average particle size of the dried particles was 70 ⁇ m.
- the dried particles were formed into a column having a diameter of 5 mm and a height of 4 mm using a tableting machine.
- the molded body was calcined at 480 ° C for 8 hours under air flow to obtain a catalyst.
- 3000 g of the catalyst A obtained in the catalyst preparation method 1 was dry-pulverized using a hammer mill to obtain pulverized particles.
- the average particle size was 25 ⁇ m.
- aqueous slurry 800 g of the pulverized particles were added to 890 ml of pure water to obtain an aqueous slurry.
- the aqueous slurry was dried with a spray drier at an outlet temperature of 140 ° C.
- the average particle size of the dried particles was 69 / im.
- to 300 g of the dried particles 18 g of microcrystalline cellulose was added and mixed well, and then formed into a column having a diameter of 5 mm and a height of 4 mm by a tableting machine.
- the molded body was calcined at 480 ° C. for 8 hours under air flow to obtain a catalyst.
- Example 2 400 g of the crushed particles of the catalyst A of the catalyst preparation method 1 in Example 2 were added to the slurry B (containing 400 g of the catalyst) obtained by the catalyst preparation method 1, and mixed by stirring to obtain an aqueous slurry.
- This aqueous slurry was dried with a spray drier at an outlet temperature of 140 ° C.
- the dried particles were formed into a cylindrical shape having a diameter of 5 mm and a height of 4 mm using a tableting machine.
- the compact was calcined at 480 ° C for 8 hours under air flow to obtain a catalyst.
- Example 1 560 g of the pulverized particles of the molded article A of the catalyst preparation method 1 and 240 g of the pulverized particles prepared in Example 2 were added to 890 ml of pure water, and stirred and mixed to obtain an aqueous slurry.
- This aqueous slurry was dried by controlling the outlet temperature to 140 ° C with a spray dryer. Next, the dried particles were formed into a cylinder having a diameter of 5 mm and a height of 4 mm using a tableting machine. Finally, the molded body was calcined at 480 ° C for 8 hours under air flow to obtain a catalyst.
- Example 2 the crushed particles of the catalyst A of the catalyst preparation method 1 in Example 2 were not formed into a slurry, but were molded as they were in Example 1 to produce a catalyst, and a catalyst performance test 1 and drop strength were performed using this catalyst. The test was performed and the results are shown in Table 1.
- the catalyst prepared according to Examples 14 to 14 exhibited catalytic performance and strength comparable to that of Reference Example 1 (Catalyst A), whereas Comparative Example 1 exhibited a catalyst performance and strength comparable to that of Reference Example 1 (Catalyst A). It can be seen that the catalyst performance and strength were clearly inferior.
- a method for preparing a molybdenum-based composite oxide catalyst used in the process of producing an unsaturated carboxylic acid by subjecting an unsaturated aldehyde to a gas phase catalytic oxidation reaction is described below.
- the powder C obtained by heating and drying the slurry C was formed into a columnar shape having a diameter of 5 mm and a height of 4 mm by a rotary tableting machine to obtain a compact B.
- the compact B was fired at 400 ° C. for 5 hours in a nitrogen gas atmosphere containing 1% of oxygen gas to obtain a catalyst B.
- a 50 ml catalyst was filled into a stainless steel reaction tube equipped with a 20 mm inner diameter stainless steel jacket, and a raw material gas with an acrolein concentration of 4%, a steam concentration of 46%, and an air concentration of 50% was applied at a space velocity of 870 / h based on 0 ° C. After passing through, a catalytic oxidation reaction of acrolein was carried out at a temperature of 250 ° C. The product was analyzed by gas chromatography according to a conventional method. The conversion of acrolein, the selectivity of acrylic acid, and the yield of acrylic acid can be defined as follows.
- Acrolein conversion (mol%) (moles of reacted acrolein / moles of supplied acrolein) x 100
- Acrylic acid selectivity (mol%) (moles of acrylic acid generated / monoles of reacted acrolein) x 100
- Acrylic acid yield (mol 0/0) (Monore number of moles / fed was Akurorein of produced acrylic acid) X 100
- 3000 g of the compact B obtained in Catalyst Preparation Method 2 was dry-pulverized using a hammer mill to obtain pulverized particles.
- An aqueous slurry obtained by adding 800 g of the pulverized particles to 900 ml of pure water was dried with a spray dryer at an outlet temperature of 130 ° C.
- the average particle size of the dried particles was 70 zm.
- the dried particles were formed into a column having a diameter of 5 mm and a height of 4 mm by a tableting machine. This molded product is treated with oxygen gas4.
- the catalyst was calcined at 400 ° C. for 5 hours in a nitrogen gas atmosphere containing / 0 to obtain a catalyst.
- Example 5 560 g of the pulverized particles of the molded body B of the catalyst preparation method 2 and 240 g of the pulverized particles prepared in Example 6 were added to 900 ml of pure water, mixed and stirred to obtain an aqueous slurry.
- the aqueous slurry was dried with a spray dryer while controlling the outlet temperature to 130 ° C.
- the dried particles were formed into a column having a diameter of 5 mm and a height of 4 mm by a tableting machine.
- the molded article was calcined at 400 ° C for 5 hours in a nitrogen gas atmosphere containing 4% oxygen gas, and a catalyst performance test 2 and a drop strength test were performed using this catalyst as a catalyst. The results are shown.
- the catalyst performance test 2 and the drop strength test were performed using the catalyst B obtained by the catalyst preparation method 2, and the results are shown in Table 2.
- a catalyst was produced by molding the crushed particles of the catalyst B of the catalyst preparation method 2 in Example 6 in the same manner as in Example 6 without slurrying, and a catalyst performance test 2 and drop strength were performed using this catalyst. When the test was conducted, the results shown in Table 2 were obtained.
- the catalyst prepared according to Examples 5-9 showed catalytic performance and strength comparable to that of Reference Example 2 (Catalyst) B, while Comparative Example 2 exhibited the same performance as Reference Example 2 (Catalyst B). It can be seen that the catalyst performance and strength are clearly inferior in comparison.
- the method of the present invention complex oxidation for producing the corresponding unsaturated aldehyde and / or unsaturated carboxylic acid by subjecting the olefin or the unsaturated aldehyde to gas-phase catalytic oxidation with a molecular oxygen-containing gas.
- the present invention provides a method for producing a composite oxide catalyst using a solid substance as a raw material by effectively utilizing a solid substance such as dust and a nonstandard catalyst precursor discharged from the production process of a product catalyst.
- the produced catalyst is used for producing a corresponding unsaturated aldehyde and / or unsaturated carboxylic acid in a high yield by gas-phase catalytic oxidation of an olefin or an unsaturated aldehyde with a molecular oxygen-containing gas. Is done. Unsaturated aldehyde produced and unsaturated Carboxylic acids are used in a wide variety of applications as raw materials for various chemicals, monomers for general-purpose resins, monomers for functional resins such as water-absorbing resins, flocculants, and thickeners.
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5715842A (en) * | 1980-06-30 | 1982-01-27 | Nitto Chem Ind Co Ltd | Manufacture of highly active fluid catalyst from coarse grained catalyst |
JPH0912489A (ja) * | 1995-06-30 | 1997-01-14 | Sumitomo Chem Co Ltd | 不飽和アルデヒド及び不飽和カルボン酸の製造方法 |
JP2001029788A (ja) * | 1999-07-21 | 2001-02-06 | Mitsubishi Rayon Co Ltd | モリブデン−ビスマス−鉄含有金属酸化物流動層触媒の製法 |
JP2001137709A (ja) * | 1999-10-01 | 2001-05-22 | Rohm & Haas Co | 触 媒 |
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JPS5315471B2 (ja) * | 1972-08-24 | 1978-05-25 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5715842A (en) * | 1980-06-30 | 1982-01-27 | Nitto Chem Ind Co Ltd | Manufacture of highly active fluid catalyst from coarse grained catalyst |
JPH0912489A (ja) * | 1995-06-30 | 1997-01-14 | Sumitomo Chem Co Ltd | 不飽和アルデヒド及び不飽和カルボン酸の製造方法 |
JP2001029788A (ja) * | 1999-07-21 | 2001-02-06 | Mitsubishi Rayon Co Ltd | モリブデン−ビスマス−鉄含有金属酸化物流動層触媒の製法 |
JP2001137709A (ja) * | 1999-10-01 | 2001-05-22 | Rohm & Haas Co | 触 媒 |
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