EP1940764A1 - Catalyseurs oxydes mixtes pour l'oxydation catalytique en phase gazeuse d'olefines et procedes pour leur production - Google Patents

Catalyseurs oxydes mixtes pour l'oxydation catalytique en phase gazeuse d'olefines et procedes pour leur production

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Publication number
EP1940764A1
EP1940764A1 EP06793560A EP06793560A EP1940764A1 EP 1940764 A1 EP1940764 A1 EP 1940764A1 EP 06793560 A EP06793560 A EP 06793560A EP 06793560 A EP06793560 A EP 06793560A EP 1940764 A1 EP1940764 A1 EP 1940764A1
Authority
EP
European Patent Office
Prior art keywords
catalyst
elements
precipitation
powder
mixed oxide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP06793560A
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German (de)
English (en)
Inventor
Achim Fischer
Werner Burkhardt
Christoph Weckbecker
Klaus Huthmacher
Frank Wilz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Evonik Operations GmbH
Original Assignee
Evonik Degussa GmbH
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Publication date
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Publication of EP1940764A1 publication Critical patent/EP1940764A1/fr
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
    • C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
    • C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
    • C07C45/34—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds
    • C07C45/36—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds in compounds containing six-membered aromatic rings
    • 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
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/0215—Coating
    • B01J37/0221—Coating of particles
    • 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
    • B01J37/0215—Coating
    • B01J37/0221—Coating of particles
    • B01J37/0223—Coating of particles by rotation
    • 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
    • B01J37/03—Precipitation; Co-precipitation
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
    • C07C45/27—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation
    • C07C45/32—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen
    • C07C45/33—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties
    • C07C45/34—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds
    • C07C45/35—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by oxidation with molecular oxygen of CHx-moieties in unsaturated compounds in propene or isobutene
    • 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
    • C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
    • C07C51/252—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring of propene, butenes, acrolein or methacrolein
    • 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
    • C07C51/255—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting
    • C07C51/265—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of compounds containing six-membered aromatic rings without ring-splitting having alkyl side chains which are oxidised to carboxyl groups
    • 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
    • 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
    • B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
    • B01J37/0027—Powdering
    • B01J37/0045—Drying a slurry, e.g. spray drying

Definitions

  • the invention relates to mixed oxide catalysts for the catalytic gas phase oxidation of olefins or methylated aromatics, processes for preparing the catalysts and the reaction to aldehydes and carboxylic acids with air or oxygen in the presence of inert gases in different proportions, at elevated temperatures and pressures.
  • the catalyst can be used to convert the highly exothermic reaction of propene to acrolein and acrylic acid or isobutene to methacrolein and methacrylic acid.
  • the highly exothermic reaction of the olefin on heterogeneous catalysts with an oxygen-containing gas leads in addition to the desired product acrolein and acrylic acid to a number of by-products: for example, to form CO2, CO, acetaldehyde or acetic acid.
  • Composition of the mixed oxide can be strongly influenced.
  • mixed oxides are generally used as the catalyst, which have a complex structure in their chemical and physical structure.
  • a variety of publications describe mixed oxides which are capable of being used as catalysts for the production of acrolein and acrylic acid from propene. These catalysts are usually made of molybdenum, vanadium and / or tungsten. To these basic components As a rule, at least one of bismuth, antimony, vanadium, tellurium, tin, iron, cobalt, nickel and / or copper is added.
  • US 2005159621 describes a catalyst consisting of the basic elements Mo, Bi, Fe, Cs.
  • the highly toxic antimony is required for this catalyst.
  • WO 2005/035115 uses the following production steps for the preparation of the catalyst: preparation of a suspension containing the metal components, drying of the suspension, comminution of the dried material, mixture of the material with a sublimable substance, in particular urea for pore formation, which is removed in the calcination.
  • the removal of organic additives in the calcination carries the danger of explosion, a controlled removal of the organic often does not succeed even with inert gas dilution. It must therefore be doubted whether such a procedure should be implemented on a production scale.
  • WO 2005/063673 describes a method by diluting the catalyst with an inert material in order to reduce the formation of heat in the reaction zone and thereby increase the product yield, by avoiding too high an excess temperature to reduce the total oxidation of the products.
  • the process described achieves only a cumulative yield of acrolein and acrylic acid of a maximum of 91.22%.
  • a time-consuming and costly Mehrzonenverfullen the reactor could be avoided.
  • the object of the present invention is to improve the catalytic activity and selectivity of the catalyst over the prior art.
  • the invention is further based on the object to provide an improved process for the preparation of aldehydes and acids, wherein the acrolein and acrylic acid from Propene be prepared by oxidation with air or oxygen in the presence of inert gases, including steam or exhaust gases from the reaction at elevated temperatures and the presence of a heterogeneous mixed oxide catalyst. It is a mixed oxide catalyst can be provided, with the next Propenum accountsn greater than 95% and a high product selectivity of the same size is achieved 88%, so that improves the efficiency of the process.
  • the conversion of the olefin to the oxidation product aldehyde and acid takes place at higher temperatures and a ratio between olefin, air and inert gas (s) of preferably 1: 6-9: 3-18.
  • Oxidizing conditions are inert.
  • these may be nitrogen, helium, ethane, propane, steam or mixtures of these. It is also possible to feed the "return gas" from the reactor again.
  • the water vapor may originate from the reaction or be added.
  • the invention relates to mixed oxide catalysts of the general formula
  • D at least one of the elements from W, P,
  • E at least one of Li, K, Na, Rb, Cs,
  • Mg, Ca, Ba, Sr, F at least one of the elements Ce, Mn, Cr, V,
  • G at least one of Nb, Se, Te, Sm, Gd,
  • H at least one of the elements of Si, Al, Ti, Zr, and
  • x number determined by the valency and frequency of elements other than oxygen.
  • the reaction is particularly advantageously carried out in reactors which allow the catalyst to be used as a fixed bed. However, it is also possible to apply the catalyst to the wall of the reaction space.
  • catalysts of general formula I can also be used for the conversion of isobutene to methacrolein and methacrylic acid. It is also possible to convert toluene to benzaldehyde and benzoic acid.
  • the preparation of the catalysts of the invention can be carried out by producing a finely divided powder through the production steps: dissolving the metal salts, precipitation of the active components, drying and calcination. It is recommended to grind the dried or calcined powder.
  • the calcined powder can be shaped become. This can be done by tableting, extrusion or by coating a carrier.
  • the carrier type or carrier form is not limiting.
  • the carrier may be a pyramid, a cylinder or a sphere. But it can also represent a wall of the reactor. Particularly preferred is the extrusion and coating of a round carrier.
  • the catalyst can be used as a fixed bed contact.
  • the carrier material may be a metal alloy, a common steel, a high temperature plastic, a ceramic or
  • the catalyst thus prepared has excellent activity, selectivity and lifetime, and gives a very good product yield.
  • the catalysts to be used in the described gas phase oxidation process are obtained by combining the dissolved compounds with the desired concentrations of the catalytically active elements of formula I.
  • the components are ideally used in the form of the compounds selected from the group consisting of ammonium or amine compounds, oxalates, carbonates, phosphates, acetates, carbonyls and / or nitrates, individually or together. Particular preference is given to carbonates, nitrates and phosphates or mixtures of these. It is also possible to use acids of the salts, for example nitric acid, phosphoric acid or carbonic acid.
  • the first stage of the catalyst preparation is, as already mentioned, a precipitate. It has been found that in a preferred embodiment, the concentration of the metal counterions during the precipitation and their molar ratios are of essential importance for the have catalytic efficiency of the oxidation catalyst.
  • Y can be any radical, especially methyl or ethyl, and the concentration of one or more of the ions, other than NO 3 " and NH 4 + , can also be zero.
  • this ammonia or ammonium salts such as ammonium carbonate
  • Ammonium heptamolybdate or metal nitrates for example, iron nitrate, cobalt nitrate; It is also possible to use the corresponding acids, for example nitric acid, in the adjustment of the ionic ratio, which amounts are necessary.
  • the pH during the precipitation is ⁇ 8, in particular ⁇ 7.
  • the temperature of the precipitation solution is also of importance. So it may be that at too high a temperature, the activity of the catalyst is significantly reduced.
  • the precipitation can be carried out in principle at temperatures of 5 to 90 0 C. However, it has been found that a catalyst, whose precursor was precipitated at temperatures of 20 to 50 0 C, is significantly more active.
  • the preparation of the coprecipitate can be carried out in a precipitation step. It is particularly preferred to carry out the precipitation in several stages by adding the individual components step by step or by mixtures of these.
  • the number of precipitation stages is not limited in principle. However, one to three precipitation stages are preferred.
  • the suspension obtained can be further processed directly or allowed to mature for> 0 to 24 hours, preferably> 0 to 12 hours, more preferably 0 to 6 hours. It is understood that the precipitation suspension is homogenized prior to further processing, for example by stirring.
  • the liquid of the suspension can be removed by evaporation, centrifugation or filtration.
  • To evaporate the liquid and at the same time to dry the solid is also possible and can be done, for example, by spray-drying.
  • Liquid should be evaporated at a temperature of 80 to 130 0 C.
  • the drying of the solid can be carried out with air, oxygen-containing inert gases or inert gases, for example nitrogen. If the drying is carried out in an oven, the temperature should be between 100 and 200 ° C.
  • the initial temperature of the dry medium of 200 and 500 ° C and a temperature at deposition of the dried powder of 80 to 200 0 C should provide.
  • the resulting grain should preferably have a particle size distribution of 15 to 160 microns with a mean grain diameter between 15 and 80 microns.
  • the dried powder can in principle in a variety of furnace types such. Eg in one Convection oven, rotary kiln, tray furnace, shaft furnace or belt kiln are calcined.
  • the quality of control or the quality of the temperature detection of the furnace should be as high as possible.
  • the residence time of the powder in the oven should be between 0.25 and 13 h, depending on the type of oven.
  • thermo decomposition It is also possible to carry out the calcination and the resulting thermal decomposition of the salts in one or more stages. In this case, temperatures of 200 to 600 0 C, in particular 300 ° to 600 ° can be used.
  • the thermal decomposition can with the addition of
  • Inert gas from mixtures of oxygen with an inert gas.
  • inert gas can be used, for.
  • nitrogen nitrogen, helium, water vapor or mixtures of these gases.
  • the comminution can be achieved dry or as an aqueous suspension, for example by grinding. However, it is advantageous to perform the comminution after calcination or in a multi-stage calcination between individual calcination stages.
  • the powder thus obtained can be used as a catalyst.
  • the mean particle size distribution of the powder should be from 0.01 to 50 ⁇ m. Particularly preferred is an average particle size distribution of 0.1 to 30 microns.
  • the geometric shape of the carrier is not limiting. Rather, it is based on the specifications of the reactor (for example, pipe diameter, length of the
  • the carrier may be a pyramid, a cylinder, a saddle, a ball or a But it can also be a wall of a reaction chamber.
  • binders various oils, celluloses, polyvinyl alcohols, saccharides, acrylates and alkyl derivatives, mixtures or condensates thereof can be used. Preference is given to acrylates, polyvinyl alcohols and celluloses. Particular preference is given to derivatives and condensates of acrylates and / or celluloses, and mixtures of these.
  • the catalyst should preferably in the temperature range 490-600 0 C are thermally treated, then the active material for use in industrial reactors that solidified.
  • the invention also relates to the oxidation of
  • the reaction for producing acrolein and acrylic acid is generally carried out at temperatures from 250 to 2.2 bara - 450 0 C and a pressure of 1.0.
  • the reactants olefin, air and inert gases are preferably fed in a ratio of 1: 6 to 9: 3 to 18 at a loading of 2 to 10 mol of olefin / dm 3 of catalyst feed / h of the catalyst bed.
  • Propene is mainly used for the production of acrolein and acrylic acid as chemical grade or polymer grade, but you can also use refinery grade propene.
  • the exhaust gas can be used from the reaction, from which the condensable components were separated. Particularly good results are the use of
  • Rohrbundel Platten (eg EP, 0 995 491, EP 1 147 807) or wall reactors (eg Redlingshoefer H., Fischer A., et al., Ind. Eng. Chem. Res. 2003, 42, 5482 -5488; EP 1 234 612) in which the catalyst is applied to the wall.
  • Platten eg EP, 0 995 491, EP 1 147 807
  • wall reactors eg Redlingshoefer H., Fischer A., et al., Ind. Eng. Chem. Res. 2003, 42, 5482 -5488; EP 1 234 612
  • the inner diameter of the reaction tubes or the distance of the plates should be 18 to 28 mm, preferably 20 to 26 mm, the wall thickness of the ferrous steel should be between 1 and 3.5 mm.
  • a typical reactor length is 3.00 to 4.00 m.
  • the catalyst is preferably used uniformly on the reactor length without dilution with diluent bodies, of course, it may require the application, for example, to dilute with inert shaped bodies.
  • the catalysts according to the invention lead to improved activity and selectivity when used in the abovementioned oxidation processes, even under high specific loading.
  • a solution I was prepared by dissolving the nitrates of iron, cobalt, nickel, manganese, potassium in the proportions by weight 23.2: 47.26: 29.28: 0.0646: 0.2067 in 3.5 liters of water, under Stirring was heated to 40 0 C and a nitric acid solution of 0.1 mol of Sm 3+ and 2 mol HNO3 was added.
  • Solution II was added slowly to solution I with vigorous stirring.
  • another solution III consisting of 790 g of bismuth nitrate and
  • the coprecipitate was stirred vigorously for 12 hours.
  • the resulting suspension was dried in a spray dryer with a hub at a gas inlet temperature of 350 0 C.
  • the amount of air was adjusted so that an exit temperature of 110 +/- 10 0 C was obtained.
  • the obtained average particle diameter of the thus prepared powder was 55 ⁇ m.
  • This powder was treated in a circulating air oven at a temperature of 445 ° C for 1 hour until a mixed oxide formed, which was milled in the next step to a mean particle diameter of 1 micron.
  • the mixed oxide was sprayed as an aqueous suspension through a two-fluid nozzle onto a ceramic spherical catalyst support and dried at 6O 0 C in a stream of air. To homogenize the pellets they were circulated in a drum. For consolidation the applied active material, the resulting material was heated to 540 0 C for 1 hour.
  • the catalyst prepared in this way had the composition: (M ⁇ i 2 Bii, 5 (Co + Ni) 8 , 0 Fei, 8 Mn 0 , oiK o , o ⁇ Po, 0 4 Al 27 SS i 0 , 6 ⁇ Sm 0 , i) O x
  • the catalyst of Example 1 was charged with a mixture of the composition of 7.5 vol% chemical grade, 58 vol% air, and inert gas (100 vol% total). The total gas flow was 36.9 l / min. The temperature of the heat carrier was 340 ° C. The propylene conversion was 94 mol%, the product selectivity for acrolein and acrylic acid being 96%.
  • Example 2 The prepared catalyst of Example 1 was blended with a composition of 7.8 vol% propene
  • the prepared catalyst of Example 1 was charged with a mixture of composition of 4.6% by volume of chemical grade, 47% by volume of air and 47% by volume of inert gas.
  • the total gas flow was 1100 l / h.
  • Temperature of the heat carrier was chosen so that the conversion of the propene was 93 mol%, while the yield of acrolein was 88%.
  • the prepared catalyst of Example 1 was blended with a composition of 5.8 vol% propene (chemical grade), charged 51 vol% air, 46 vol% inert gas. The total gas flow was 20 l / min. The temperature of the heat carrier was chosen so that the conversion of the propene was 92 mol%, while the selectivity of acrolein was 92%.
  • the prepared catalyst of Example 1 was charged with a mixture of composition 6.2 vol% chemical grade, 55% air and nitrogen.
  • the total gas flow was 22.2 l / min.
  • the temperature of the heat carrier was 327 ° C, the propene conversion was 96 mol%, while the selectivity of acrolein was 91%.
  • the calcined mixed oxide was prepared as described in Example 1. 1.6 kg of the mixed oxide powder are mixed with 0.4 kg of pentaerythritol (very finely ground). A 6% methyl cellulose solution was added into this mixture and kneaded until a homogeneous, plastic mass obtained under a constant pressure as a pellet with a diameter of 3 mm and extruded a length of 5 mm and was dried at 10 0 C.
  • the extrudate was solidified in the rotary kiln.
  • the inlet and speed of rotation is coordinated so that the residence time in the tube was 20 minutes.
  • the peak temperature of the tube was 580 0 C.
  • the catalyst of Example 3 was charged with a mixture of the composition of 7.3 vol% chemical grade, 57 vol% air and inert gas. At a bath temperature of 308 0 C and a contact time of 2.9s was obtained at a conversion of 90%, acrolein and acrylic acid with a selectivity of 94%. 5
  • a solution I was prepared by dissolving the nitrates of iron, cobalt, nickel, manganese, potassium in the proportions by mass 37.16: 31.24: 31.22: 0.06133: 0.3095 in 3.5 liters of water, heated with stirring to 40 0 C and a nitric acid solution of 0.1 mol of Sm 3+ and 2 mol HNO3 admitted.
  • a solution II a solution of 2119 g of ammonium heptamolybdate in 2.7 1 of water was prepared at 40 0 C, to 4.4 g of phosphoric acid and 0.4 g of Aerosil 200 (Degussa), 14 g of alumina in 1 1 water was added.
  • Solution II was added slowly to solution I with vigorous stirring.
  • another solution consisting of 776 g bismuth nitrate and 0.72 mol HNO3 was set. By adding this solution to the other active components, the coprecipitate was obtained.
  • the coprecipitate was stirred vigorously for 12 hours.
  • the resulting suspension was dried in a spray dryer with a hub at a gas inlet temperature of 350 0 C.
  • the amount of air was adjusted so that an exit temperature of 110 +/- 10 0 C was obtained.
  • the obtained average particle diameter of the thus prepared powder was 55 ⁇ m.
  • the thus obtained powder was treated in a circulating air oven at a temperature of 445 ° C for 1 hour to form the mixed oxide.
  • the mixed oxide was sprayed as an aqueous suspension through a two-fluid nozzle on a ceramic spherical catalyst support and dried in a steady stream of air. To homogenize the pellets they were circulated in a drum. To solidify the applied active composition, the resulting material was heated to 540 0 C for 2 hours.
  • the catalyst thus prepared has the composition: (Mo i 2 Bi, 6 C ⁇ 3 , 4 Fe 2 , 9 Ni 3 , 4 Mn O1O iKo 1I Po 1CM Al 275 Sig , 35 Sm 0 , i) O x
  • the catalyst of Example 5 was charged with a mixture of the composition of 7.3 vol% chemical grade, 57 vol% air and inert gas. At a bath temperature of 350 0 C and a contact time of 2.7s was obtained at a conversion of 93%, acrolein and acrylic acid with a selectivity of 96%.
  • a solution I was prepared by dissolving the nitrates of iron, cobalt, nickel, manganese, potassium in the proportions by weight 23.2: 47.26: 29.28: 0.0646: 0.2067 in 3.5 liters of water and heated with stirring to 40 0 C and a nitric acid solution of 0.1 mol of Sm 3+ and 2 mol HNO3 admitted.
  • Solution II was added slowly to solution I with vigorous stirring.
  • another solution III consisting of 790 g of bismuth nitrate and 0.72 mol HNO3 was prepared. By adding this solution to the other active components, the coprecipitate was obtained for the preparation of the active catalyst phase.
  • the coprecipitate was stirred vigorously for 12 hours.
  • the resulting suspension was dried in a spray dryer with a hub at a gas inlet temperature of 350 0 C.
  • the amount of air was adjusted so that an exit temperature of 110 +/- 10 0 C was obtained.
  • the obtained average particle diameter of the thus prepared powder was 55 ⁇ m.
  • the thus obtained powder was treated in a circulating air oven at a temperature of 445 ° C for 1 hour to form the mixed oxide.
  • the mixed oxide was sprayed as an aqueous suspension whose solid has an average particle diameter (D50 value) of 1 ⁇ m through a two-substance nozzle onto a ceramic spherical catalyst support and dried in a steady stream of air. To homogenize the pellets they were circulated in a drum. To solidify the applied active composition, the resulting material was heated to 540 0 C for 2 hours.
  • D50 value average particle diameter
  • the catalyst thus prepared has the following composition: (M ⁇ i2Bii, 5 (Co + Ni) 8, Ofei, 7 MnO, oiko, o6Po, ⁇ 4Smo, i) O x
  • the prepared catalyst of Example 5 was charged with a mixture of the composition of 7.3 vol% chemical grade, 57 vol% air and inert gas. At a bath temperature of 333 ° C and a contact time of 2.5s was obtained at a conversion of 92%, acrolein with a selectivity of 89%.
  • Example 1 The manufacturer's instructions for Example 1 have been changed so that the catalyst is the composition:
  • the prepared catalyst of Example 9 was blended with a composition composition of 3% by volume of chemical grade, 43% by volume of air, 5.2% by volume of water and Inert gas charged. The total gas flow was 16 l / min. The temperature of the heat carrier was chosen so that the conversion of the propene was 97 mol%, while the yield of acrolein was 87%.
  • the preparation of the catalyst was carried out as described in Example 1 at a solution temperature of 80 0 C.
  • the catalyst thus prepared was charged with a mixture of the composition of 7.5 vol% chemical grade, 58 vol% air, and inert gases.
  • the maximum possible total gas flow was only 28.2 l / min.
  • the temperature of the heat carrier was 15 ° C higher than in Example 2a, yet a propene conversion of only 91% could be obtained, the acrolein yield was only 82%.
  • the catalyst is thus significantly less active
  • the catalyst thus prepared reached a maximum selectivity of acrolein of 85% (selectivity to acrolein and acrylic acid of 88%) at a propene conversion of 96%.
  • the catalyst thus produced was thus significantly less selective.
  • the preparation of the catalyst is carried out as described in Example 1, but the average particle diameter in the coating suspension is 25 ⁇ m.
  • Example 2a The testing of the catalyst is carried out under conditions of Example 2a. In this case, a 15 ° C higher bath temperature had to be set, but the resulting propene conversion was only 88 mol%. The catalyst was thus significantly less active.

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  • Chemical Kinetics & Catalysis (AREA)
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Abstract

L'invention concerne des catalyseurs oxydes mixtes pour l'oxydation catalytique en phase gazeuse d'oléfines et de composés aromatiques méthylés. L'invention concerne également des procédés pour la production de ces catalyseurs, ainsi que la transformation des composés de départ en aldéhydes et acides carboxyliques par réaction avec de l'air ou de l'oxygène en présence de gaz inertes dans des proportions différentes, avec élévation des températures et de la pression.
EP06793560A 2005-10-14 2006-09-15 Catalyseurs oxydes mixtes pour l'oxydation catalytique en phase gazeuse d'olefines et procedes pour leur production Ceased EP1940764A1 (fr)

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DE102005049717 2005-10-14
DE102006015710A DE102006015710A1 (de) 2005-10-14 2006-04-04 Mischoxidationskatalysatoren für die katalytische Gasphasenoxidation von Olefinen und Verfahren zu ihrer Herstellung
PCT/EP2006/066411 WO2007042369A1 (fr) 2005-10-14 2006-09-15 Catalyseurs oxydes mixtes pour l'oxydation catalytique en phase gazeuse d'olefines et procedes pour leur production

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DE (1) DE102006015710A1 (fr)
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DE102009047291A1 (de) 2009-11-30 2010-09-23 Basf Se Verfahren zur Herstellung von (Meth)acrolein durch heterogen katalysierte Gasphasen-Partialoxidation
CN105452210B (zh) 2013-06-03 2018-11-20 赢创德固赛有限公司 制备丙烯醛的方法
CN103433050B (zh) * 2013-08-13 2015-02-25 浙江绿科安化学有限公司 一乙醇胺催化胺化一步法合成哌嗪催化剂的制备方法
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DE102014203725A1 (de) * 2014-02-28 2015-09-03 Basf Se Oxidationskatalysator mit sattelförmigem Trägerformkörper
DE102015200702A1 (de) 2015-01-19 2016-07-21 Evonik Degussa Gmbh Herstellung von Butadien aus Ethen
DE102015209638A1 (de) 2015-05-27 2016-07-07 Basf Se Verfahren zur Herstellung eines Bismut und Wolfram enthaltenden Multielementoxids durch Co-Präzipitation
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EP3219386A1 (fr) 2016-03-14 2017-09-20 Evonik Degussa GmbH Procédé de fabrication hydrothermal de catalyseurs d'oxydes mixtes à base de molybdène, bismuth, cobalt et fer
RU2729070C2 (ru) * 2016-06-14 2020-08-04 Асахи Касеи Кабусики Кайся Способ получения катализатора аммоксидирования и способ получения акрилонитрила
EP3323510A1 (fr) 2016-11-21 2018-05-23 Evonik Degussa GmbH Procédé de préparation d'un catalyseur d'oxyde mixte par pyrolyse par projection de flamme
CN111774081B (zh) * 2017-07-05 2022-08-09 中国石油化工股份有限公司 能够降低CO和NOx排放的组合物及其制备方法和应用
CN109201080B (zh) * 2017-07-05 2020-12-04 中国石油化工股份有限公司 能够降低CO和NOx排放的组合物及其制备方法和应用以及流化催化裂化方法
CN109201075B (zh) * 2017-07-05 2020-07-24 中国石油化工股份有限公司 能够降低CO和NOx排放的组合物及其制备方法和应用以及流化催化裂化方法
CN111774078B (zh) * 2017-07-05 2022-08-12 中国石油化工股份有限公司 能够降低CO和NOx排放的组合物及其制备方法和应用
CN109201079B (zh) * 2017-07-05 2020-12-04 中国石油化工股份有限公司 能够降低CO和NOx排放的组合物及其制备方法和应用以及流化催化裂化方法
CA2975144A1 (fr) * 2017-08-03 2019-02-03 Nova Chemicals Corporation Catalyseur de deshydrogenation oxydante aglomere
JP7001982B2 (ja) * 2018-02-26 2022-02-04 三菱ケミカル株式会社 α，β－不飽和カルボン酸製造用触媒の製造方法、並びにα，β－不飽和カルボン酸及びα，β－不飽和カルボン酸エステルの製造方法
SG11202008430RA (en) 2018-03-21 2020-10-29 Rohm & Haas Method for preparing acrylic acid
EP3768657B1 (fr) * 2018-03-21 2024-04-24 Rohm and Haas Company Procédé de préparation d'acroléine
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BRPI0617370A2 (pt) 2011-07-26
CN101331103A (zh) 2008-12-24
RU2008118490A (ru) 2009-11-20
DE102006015710A1 (de) 2007-04-26
WO2007042369A1 (fr) 2007-04-19
CA2625922A1 (fr) 2007-04-19
CN101331103B (zh) 2013-04-17
RU2396115C2 (ru) 2010-08-10
US20090030230A1 (en) 2009-01-29
BRPI0617370B1 (pt) 2016-05-17
US8008227B2 (en) 2011-08-30
JP5227176B2 (ja) 2013-07-03

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