EP1648602A1 - Corps de support de catalyseur a revetement - Google Patents

Corps de support de catalyseur a revetement

Info

Publication number
EP1648602A1
EP1648602A1 EP04763669A EP04763669A EP1648602A1 EP 1648602 A1 EP1648602 A1 EP 1648602A1 EP 04763669 A EP04763669 A EP 04763669A EP 04763669 A EP04763669 A EP 04763669A EP 1648602 A1 EP1648602 A1 EP 1648602A1
Authority
EP
European Patent Office
Prior art keywords
coating
catalyst carrier
carrier body
catalyst
oxygen
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.)
Withdrawn
Application number
EP04763669A
Other languages
German (de)
English (en)
Inventor
Torsten Balduf
Armin Lange De Oliveira
Werner Burkhardt
Guido Stochniol
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
Degussa GmbH
Stockhausen GmbH
Chemische Fabrik Stockhausen GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Degussa GmbH, Stockhausen GmbH, Chemische Fabrik Stockhausen GmbH filed Critical Degussa GmbH
Publication of EP1648602A1 publication Critical patent/EP1648602A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24—Stationary reactors without moving elements inside
    • B01J19/248—Reactors comprising multiple separated flow channels
    • B01J19/249—Plate-type reactors
    • 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
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/32—Packing elements in the form of grids or built-up elements for forming a unit or module inside the apparatus for mass or heat transfer
    • 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
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/24—Chromium, molybdenum or tungsten
    • B01J23/30—Tungsten
    • 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
    • B01J37/0201—Impregnation
    • B01J37/0203—Impregnation the impregnation liquid containing organic compounds
    • 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
    • B01J37/0225—Coating of metal substrates
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • F28F3/14—Elements constructed in the shape of a hollow panel, e.g. with channels by separating portions of a pair of joined sheets to form channels, e.g. by inflation
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/24—Stationary reactors without moving elements inside
    • B01J2219/2401—Reactors comprising multiple separate flow channels
    • B01J2219/245—Plate-type reactors
    • B01J2219/2451—Geometry of the reactor
    • B01J2219/2453—Plates arranged in parallel
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/24—Stationary reactors without moving elements inside
    • B01J2219/2401—Reactors comprising multiple separate flow channels
    • B01J2219/245—Plate-type reactors
    • B01J2219/2451—Geometry of the reactor
    • B01J2219/2456—Geometry of the plates
    • B01J2219/2459—Corrugated plates
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/24—Stationary reactors without moving elements inside
    • B01J2219/2401—Reactors comprising multiple separate flow channels
    • B01J2219/245—Plate-type reactors
    • B01J2219/2461—Heat exchange aspects
    • B01J2219/2462—Heat exchange aspects the reactants being in indirect heat exchange with a non reacting heat exchange medium
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/24—Stationary reactors without moving elements inside
    • B01J2219/2401—Reactors comprising multiple separate flow channels
    • B01J2219/245—Plate-type reactors
    • B01J2219/2476—Construction materials
    • B01J2219/2477—Construction materials of the catalysts
    • B01J2219/2479—Catalysts coated on the surface of plates or inserts
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/24—Stationary reactors without moving elements inside
    • B01J2219/2401—Reactors comprising multiple separate flow channels
    • B01J2219/245—Plate-type reactors
    • B01J2219/2476—Construction materials
    • B01J2219/2483—Construction materials of the plates
    • B01J2219/2485—Metals or alloys
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32203—Sheets
    • B01J2219/3221—Corrugated sheets
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32203—Sheets
    • B01J2219/32213—Plurality of essentially parallel sheets
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/322—Basic shape of the elements
    • B01J2219/32203—Sheets
    • B01J2219/32224—Sheets characterised by the orientation of the sheet
    • B01J2219/32227—Vertical orientation
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/324—Composition or microstructure of the elements
    • B01J2219/32408—Metal
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/324—Composition or microstructure of the elements
    • B01J2219/32466—Composition or microstructure of the elements comprising catalytically active material
    • 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
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/32—Details relating to packing elements in the form of grids or built-up elements for forming a unit of module inside the apparatus for mass or heat transfer
    • B01J2219/324—Composition or microstructure of the elements
    • B01J2219/32466—Composition or microstructure of the elements comprising catalytically active material
    • B01J2219/32475—Composition or microstructure of the elements comprising catalytically active material involving heat exchange

Definitions

  • the invention relates to a catalyst carrier body which has a surface on which a coating is provided.
  • Such catalyst carrier bodies are used for the catalytic conversion of reactants, for example in the partial oxidation of propene and acrolein to acrolein or acrylic acid.
  • the invention further relates to a process for the production of a coating for a catalyst carrier body, a process for the production of an organic molecule having at least one double bond and oxygen, a process for the production of a water-absorbing polymer, a process for the production of a water-absorbent hygiene article and chemical products or the like Use of (meth) acrylic acid in chemical products.
  • Reactors for carrying out catalyzed endothermic or exothermic reactions are known in the prior art in various forms.
  • the reaction partners are usually guided past free-flowing catalyst particles (bulk material) which are arranged in a reaction space.
  • the reactants are brought into contact with the catalyst, which promotes conversion. Due to the fact that such reactions often only take place in a certain (albeit possibly lower) temperature range with a high conversion rate, it is particularly important to maintain precisely these temperatures over the longest possible period. It is of particular interest here to ensure sufficient heat dissipation in the case of exothermic chemical reactions in order to avoid an uncontrolled course of the chemical reactions.
  • DE 101 08 380 discloses a reactor for carrying out catalyzed chemical reactions with a heat exchanger which has reaction and heat transport spaces which are separated from one another by thermal plates.
  • the catalyst is applied in the form of a thin layer on at least a part of the surface of the thermal plates which faces the reaction space.
  • the reactor described there has a significantly smaller surface for heat exchange, which can initiate a catalytic reaction with the reactants with regard to the gas stream flowing past.
  • the reactor described in this document has the disadvantage that the catalyst is applied to the inside of the thermal sheets. This is particularly disadvantageous when the catalysts are used to produce acrylic acid from propene, since the carbon deposits that inevitably result from this reaction are difficult to remove from the interior of the thermal sheets and these deposits can clog the flow channels inside the thermal sheet after longer operating times ,
  • the object of the present invention is to eliminate the technical problems known from the prior art.
  • a method for producing such catalyst carrier bodies is to be specified which is particularly simple and inexpensive to carry out and leads to advantageous catalyst carrier bodies which have a catalyst which, despite the largest possible surface area, shows good adhesion to the carrier body ,
  • Another object of the present invention is to provide a reactor which is characterized by low maintenance work and a homogeneous temperature distribution.
  • an intensive contact of the reaction starting materials with the catalyst is to be ensured in order to improve capacity and / or selectivity.
  • an object is to provide an economical process for producing organic, at least one, with high turnover and selectivity To provide double-bonded molecules from which water-absorbing polymers can be produced without excessive work-up, which in turn can be incorporated into hygiene articles.
  • the catalyst carrier body according to the invention has a surface on which a coating connected to the surface is provided, the coating having cracks with a length, these lengths showing a total crack length of at least 500 m / m [meters per square meter] and wherein the coating has an adhesive tensile strength of at least 500 N / m 2 [Newtons per square meter].
  • the catalyst carrier body is designed with a first coefficient of thermal expansion and the coating has a second coefficient of thermal expansion.
  • Expansion coefficients have at least at a temperature from a loading range from 20 ° C to 650 ° C a deviation of at least 10%.
  • the deviation is in the range from 15% to 95%, preferably from 15% to 50%, also preferably from 15% to 35% and particularly preferably in the range from 15% to 25%.
  • the surface of the catalyst carrier body does not have to be completely provided with the coating, but it is advantageous that at least part of the surface bounding the reaction space or the outer surface (in contact with the environment) is provided with such a coating Coating is provided.
  • Coating it is possible that only stains, strips or similar partial areas (for example at least 50%, or at least 70%) are coated.
  • the configuration with a completely coated, outer surface is preferred.
  • the coefficient of linear expansion is the quotient of the relative change in length Al / l ⁇ and the temperature change ⁇ T; where ⁇ l is the change in length with respect to the initial length of the body before the temperature change (1]) and the end length of the body after the temperature change (1 2 ). and ⁇ T. the temperature change rank (difference between temperature when measuring the end length of the body and the start length of the body before the temperature change). In terms of formula, this relationship is as follows:
  • the thermal expansion coefficients specified here are in each case an average value with respect to the catalyst carrier body or the. Coating is concerned. In order to take this into account to a greater extent, however, it is also possible that the thermal expansion coefficient relates not only to a change in length, but possibly to a change in area (two-dimensional view of the surface) or, in some circumstances, even a change in volume. With regard to a catalyst carrier body constructed from several components, it should also be pointed out that its coefficient of expansion relates in particular to the components or components which form the surface on which the coating is provided.
  • the two coefficients of thermal expansion exhibit the predetermined deviation at least at a temperature in a range from 20 ° C. to 650 ° C.
  • a deviation is present over the entire temperature range
  • at least the 'deviation should be present in a temperature range of 200 to 500 ° C.
  • the coefficient of expansion is determined by measuring the distance between these points at a corresponding temperature on a hot table under a microscope using points at the corners and edges of the prop body that are as far apart as possible. In order to keep statistical fluctuations as low as possible, 10 or more measurements have proven their worth.
  • the amount of the deviation is essentially constant over the entire temperature range (for example in a tolerance range of 5%, in particular 2%), but this is not absolutely necessary.
  • the catalyst carrier body preferably has the higher coefficient of thermal expansion, ie it has a greater tendency to expand when the temperature rises. This increased effort compared to the coating leads to tensile stresses being introduced into the coating.
  • the adhesive forces ie the adhesion of the coating on the surface of the catalyst carrier body, are sufficiently large to permanently prevent the coating from flaking off the catalyst carrier body under the ambient conditions during later use.
  • the tensile stress is introduced into the inner areas of the coating.
  • the coating represents, for example, a closed surface, as has already been described with reference to the prior art
  • this tensile stress now leads to the cohesive forces prevailing within the coating being overcome.
  • cracks, pores or similar structures are created inside or up to the outer boundary layer of the coating.
  • this may result in a large number of cracks propagating through the coating, the outer contact area of the coating being enlarged, for example, with reaction media flowing past.
  • a kind of "expansion joints" are formed, which in turn compensate for the different thermal expansion behavior by widening.
  • the coating have cracks with a length, with an overall crack length of at least 500 m / m [meters per square meter].
  • the total crack length is at least 1,000 m / m 2 , preferably at least 2,000 m / m 2 and preferably at least 4,000 m / m 2 .
  • a maximum total crack length of up to 10 6 m / m 2 and preferably up to 10 m / m is preferred.
  • Cracks in particular include those phenomena in the coating that each have a length of at least 200 ⁇ , in particular at least 500 ⁇ . It is assumed that this is a material expansion that has a preferred direction of expansion, that is to say The cracks usually have a width which is at most 1/10 of the crack length, and the depth of a crack, ie the extent in the direction of the thickness of the coating, depends essentially on the thickness of the coating
  • a crack is said to be present if its depth is at least 80% of the layer thickness, in particular at least 90%. Grinding the catalyst layers exposes deeper layers and it is possible to iteratively trace the depth of the crack.
  • total crack length that is, the sum of all (individual) lengths of the cracks, relates to a unit area of 1 mx 1 m.
  • the coating in a work surface (of any dimensions), for example, under viewed from a microscope. Images of such work surfaces can be measured and read out, for example, using image processing software. The individual lengths of the cracks can be determined automatically or by hand and added together, so that an absolute total crack length is formed. This absolute total crack length is now related to the determination of the relative total crack length with respect to a unit area of 1 mx 1 m.
  • the coating has a layer thickness that is at least 0.02 mm [millimeters].
  • the layer thickness is preferably in a range from 0.1 mm to 3 mm, in particular in a range from 0.5 mm to 2 mm and moreover preferably in a range from 0.7 mm to 1.2 mm.
  • the layer thicknesses mentioned here are relatively thick, especially with regard to the materials used for the catalyst carrier body. However, they are required, for example, to provide a sufficient catalytic surface in the case of the partial oxidation of propene and acrolein to acrylic acid.
  • the layer thickness in turn relates to a value that is averaged over the entire coating. It relates to the distance from the surface of the catalyst carrier body to the opposite boundary layer of the coating.
  • the coating have an adhesive tensile strength of at least 500 N / m 2 [Newton per square meter] and preferably at least 10,000 N / m 2 .
  • the adhesive tensile strength is in a range from 500 N / m 2 to 100,000 N / m 2 , preferably in a range from 1,000 N / m 2 to 25,000 N / m 2 .
  • the tensile strength is limited by the stability of the catalyst as such.
  • the adhesive tensile strength serves as a measure of the adhesive forces, that is, the surface adhesion of the coating on the catalyst carrier body. This adhesive tensile strength is preferably greater than the cohesive forces prevailing inside the coating.
  • a stamp of predetermined dimensions is placed on a coating applied to a catalyst carrier body and connected to it.
  • the connection can be made by mechanical anchoring, gluing, or in a similar manner.
  • the stamp is brought into connection with a pull-off device which reveals the tensile force acting on the coating.
  • the tensile force is now increased step by step or continuously until essential parts of the coating are torn off the surface of the catalyst carrier body.
  • the value determined in this way represents an adhesive tensile strength in the present sense.
  • the coating is a catalytically active coating for the partial oxidation of propene to acrolein and further to acrylic acid.
  • These are preferably metals or salts of metals, in particular metal oxides.
  • Preferred metals are transition metals and lantanoids.
  • the metals of subgroup 5 and 6 are preferred, Mo, V, Nb and W being particularly preferred and Mo, W and V being further preferred.
  • this contains Ni in addition to one or more of the above metals.
  • the metals can also be present as an oxide, in pure form or as mixtures, alloys or intermetallic phases.
  • the coating comprises at least one inert and thus non-catalytically active component in addition to the catalyst.
  • This is preferably in X-ray amorphous form, with oxides of aluminum and silicon being particularly preferred.
  • the organic auxiliaries which are preferably water-soluble are used in the coating. These are incorporated into the coating in particular before drying. This can be done by bringing these aids into contact with the other components before coating the surface. For example, a slurry can be mixed with the other components of the coating as a coating suspension using these auxiliaries by mixing and homogenizing.
  • Polymeric substances are preferred as organic auxiliaries. Molecular weights (M n ) of more than 5,000 g mol, preferably more than 20,000 g / mol and particularly preferably more than 100,000 g / mol, have proven successful here. Poly sugars or their derivatives are preferred as polymers.
  • the poly sugars shown in particular cellulose and its derivatives, are preferred.
  • the derivatives of oxygen such as ether are considered as derivatives.
  • cellulose ethers such as Tylose ® are particularly preferred.
  • the coating comprises at least one component containing silicon and oxygen.
  • the component containing silicon and oxygen is preferably an aerosil.
  • the catalyst carrier body it is also proposed that it be constructed with metallic material. This metallic material preferably has at least one of the following elements: aluminum, iron, nickel.
  • the metallic material loading 'Sonders has good properties in terms of heat conduction, so a rapid heat removal or rapid supply of heat is possible towards the catalyst or the catalytically active coating.
  • the metallic see material the advantage that it has a high degree of design freedom. This means that application-specific parameters (for example, the available space) can easily be taken into account in the manufacture of the catalyst carrier body, or to a certain extent an adaptation when installing in a reactor is possible. Because of the conditions prevailing in the reaction space, it is advantageous that the catalyst carrier body is resistant to high temperatures and corrosion. For this purpose, it is advantageously proposed that the metallic material have a sufficient proportion of aluminum, iron and / or nickel.
  • the following steels are particularly preferred: Steel 1.4571 (V2A) with an ⁇ (20 to 400 ° C) of 18.5 * 10 "6 / K; 1.4401 with an ⁇ (20 to 400 ° C) of 18.5 * 10 "6 / K; 1.4903 with an ⁇ (20 to 400 ° C) of 14 * 10 "6 / K; 1.4713 with an ⁇ (20 to 400 ° C) of 12 * 10 ⁇ 6 / K; Ni alloys 2.4617 with an ⁇ (20 to 400 ° C) of 11.4 * 10 "6 / K; 2.4816 (Iconel ® 600) with an ⁇ (20 to 400 ° C) of 14.5 * 10 "6 / K; as well as Ti alloys 3.7025 and 3.7035 with an ⁇ (20 to 400 ° C) of 9.3 * 10 "6 / K.
  • the catalyst carrier body comprises a multi-walled sheet metal construction with at least one channel through which a substance can flow.
  • a multi-walled sheet metal construction is not only a simple heat exchange wall, but rather is suitable, for example, for passing the coolant through it inside.
  • the entire surface, which delimits the sheet metal structure from the outside to the environment, can preferably be used for coating and thus also to favor the chemical reactions taking place there.
  • Multi-walled is understood to mean, for example, a connection of two parallel sheets, which have individual webs, sleeves, guide surfaces, pipes, etc. on the inside, which on the one hand space the two sheets, but on the other hand also divide the interior into flow channels or flow spaces -
  • Such sheet metal constructions are equipped with an inlet and an outlet, so that a coolant or a heating medium can flow through.
  • the coolant or heating medium which is generally referred to here as a substance, is generally gaseous or liquid. However, it is also possible for such a substance to have gas and liquid fractions; the gaseous and / or liquid substances can also carry solids.
  • the channel itself can preferably be flowed through freely, i. that is, no additional materials are built into it. Since the same flow resistance should prevail over the entire cross-section of the sheet metal construction, in order to enable even removal or supply of heat over the surface of the sheet metal construction, the application of such additional materials or components inside the duct is generally the rule disadvantageous.
  • the latter comprises a plurality of plates which form an opening through which a fluid can flow.
  • openings means in particular passages that are recognizable in a cross section through such a plate construction. While channels are still formed above through the sheet metal construction, in which a partial substance flow passes through the sheet metal construction independently of a further partial substance flow If the variant proposed here comprises a plurality of plates with openings through which flow can pass, this does not necessarily have to be the case, but rather a plurality of cavities, preferably communicating with one another (ie exchanging currents with one another), can be provided between the plates.
  • the plates essentially form flat sheets, which may be provided with a structure.
  • This structure preferably has a structure height that is small compared to the length or width of the sheet, in particular less than 10%.
  • Such structures of the plates have an enlargement of the surface of the catalyst Carrier body result, so that more coating material can be applied at the same time.
  • Ribs, waves, knobs or the like, for example, have proven themselves as structures.
  • Such a catalyst carrier body is preferably designed as a so-called “thermoplate”.
  • a “thermoplate” is a metal plate that is welded together at predetermined points or at predetermined lines to form connecting regions or is joined together in another way by joining technology , flow channels being formed between these connection areas. As a rule, this takes place in that, after the joining technology connections have been formed, the space between the metal plates is subjected to a pressure which results in a plastic deformation of the regions of the metal sheets which are not connected to one another. As a result, pillow-like protrusions are formed, which usually produce elliptical flow opening cross sections.
  • Such “thermal plates” are preferably self-supporting and enable the implementation of a compact heat exchanger with a large heating surface.
  • thermo sheets are used as the catalyst carrier body, in one embodiment of the catalyst carrier body according to the invention, in which the coating has cracks with an overall crack length of at least 500 m / m 2 , the coating is not on the inside of the cushion-like bulges , but applied to the outside of these bulges (variant A).
  • the “outside” of a thermoplate is understood to mean that side of the thermoplate that is given the reference number 2 in FIG.
  • the coolant flows through the flow channels which are formed in the interior of the “thermoplate” by welding the metal plates together at predetermined points or at predetermined lines.
  • Another embodiment of the catalyst carrier body according to the invention is in use of "thermal sheets” the coating on the surface of the flow channels mentioned above applied so that in this case the coolant flows through the gaps between two adjacent “thermal sheets” and thus along the outer surface of the cushion-like protrusions of the "thermal sheets” (variant B).
  • variant A is particularly preferred when “thermoplates” are used as the catalyst carrier body.
  • the catalyst carrier body it is constructed with ceramic material.
  • ceramic material is preferably used, which comprises at least one of the following elements: codierite, silicon carbide, aluminum oxide, silicon oxide, titanium oxide.
  • a catalyst carrier body made of ceramic material can be an alternative, for example, if relatively small catalyst carrier bodies are required, or if the catalyst carrier bodies can simply be produced in an extrusion process.
  • Such ceramic catalyst carrier bodies also offer the possibility of utilizing the inherent property of porosity and of using the material of the catalyst carrier body to increase the adhesive strength with regard to the coating or the effectiveness of the catalytically active coating.
  • adapted catalyst carrier bodies are also possible, which comprise both metallic and ceramic material.
  • a catalyst carrier body having a surface on which a coating connected to the surface is provided, the catalyst carrier body being a thermal sheet and the coating on the outside of the thermal sheet is attached.
  • the “outside” of a thermal sheet is again understood to mean that side of the thermal sheet which is identified by the reference number 2 in FIG. 1.
  • Preferred coatings are those coatings which have already been mentioned as preferred coatings, whereby also here a catalytically active coating for the partial oxidation of propene and acrolein is particularly preferred is moving.
  • the layer thickness of the coating and its adhesive tensile strength preferably also correspond to those layer thicknesses and adhesive tensile strengths which have already been mentioned above in connection with the coating of the catalyst carrier body.
  • the coating has cracks with a length, this length having a total crack length of at most 500 m / m [meters per square meter] , particularly preferably at most 250 m / m ", even more preferably at most 100 m / m 2 ', moreover preferably at most 10 m / m 2 , furthermore still more preferably at most 1 m / m 2 , a coating without cracks being most preferred
  • the total crack length is preferably determined in the manner described at the beginning.
  • a reactor for producing polymerizable monomers with at least one reaction space through which a fluid can flow is proposed, the at least one reaction space comprising at least one catalyst support body, as described above.
  • the reaction space can be a column, a container or another, preferably lockable space, which preferably withstands pressures in the range from 1 to 50 bar, preferably in the range from 2 to 40 bar and particularly preferably 10 to 35 bar.
  • Such reaction spaces preferably have a plurality of catalyst support bodies, which are arranged in particular parallel to one another and thus delimit partial volumes between them through which the reaction mixture is carried out.
  • a reaction space for producing polymerizable monomers such as acrolein or acrylic acid, usually has at least two catalyst support bodies which are arranged adjacent to one another.
  • the individual catalyst carrier bodies are preferably at a distance from one another which is essentially the same. This ensures that one over the entire reaction space uniform heat dissipation or supply takes place and accordingly there is also a homogeneous temperature distribution.
  • a method for producing a coating on a surface of a catalyst carrier body comprises at least the following steps: producing a solid-liquid phase with a catalyst which is suitable for producing an organically at least one Double bond and oxygen-containing molecule, application of the solid-liquid phase to a catalyst support body,
  • the total crack length per unit cross-sectional area is preferably at least 1,000 m / m 2 , preferably 2,000 m / m 2 and in particular at least 4,000 m / m 2 .
  • a method for producing a coating on a thermal sheet as a catalyst support body comprises at least the following steps: producing a solid-liquid phase with a catalyst which is suitable for producing an organic at least one double bond and Is the molecule containing oxygen, applying the solid-liquid phase on the outside of the thermal sheet, - forming a coating on the outside of the thermal sheet.
  • the total crack length in the coating per unit cross-sectional area is preferably at most 500 m / m 2 , particularly preferably at most 250 m / m 2 , even more preferably at most 100 m / m 2 , more preferably at most 10 m / m 2 and most preferably at most 1 m / m 2 or no cracks.
  • a slurry is preferred as the solid-liquid phase, which contains at least the catalyst and optionally at least one of the additions described above. It is again preferred that one or more catalyst precursors from which the raw catalyst powder is obtained or at least one raw catalyst powder or at least one catalyst precursor and at least one raw catalyst powder as such or as a slurry in an amount in the range from 10 to 90% by weight.
  • % preferably from 30 to 80% by weight and particularly preferably from 40 to 70% by weight, in each case based on the solid-liquid phase, is contained therein.
  • Suitable liquid phases are all those known to the person skilled in the art to be suitable.
  • water alcohols such as ethanol, 'as acetone or hexane, or mixtures of at least two thereof, wherein water or alcohols are particularly preferred, and water is also preferred.
  • the solid-liquid phase is now applied to a catalyst carrier body.
  • the application also includes, in particular, spraying, vapor deposition, brushing, applying, gluing, sintering, or similar manufacturing processes.
  • the catalyst can be applied by using at least one of the following methods: CVD, PVD, sputtering, reactive sputtering, galvanic methods, or the like.
  • CVD chemical vapor deposition
  • PVD physical vapor deposition
  • sputtering reactive sputtering
  • galvanic methods or the like.
  • the manufacturing processes are repeated several times or alternately. Under certain circumstances, it is also sensible to carry out the application discontinuously, with rest periods being observed between the individual application processes or thermal treatment taking place.
  • the catalyst support body is treated with a better adhesion before the application of the solid-liquid phase.
  • the surface adhesion between the catalyst carrier body and the coating is relatively high or durable. It is therefore also advantageous to treat the surface of the catalyst carrier body before the application of the solid-liquid phase in such a way that the formation of thermally and dynamically heavy-duty connections between the catalyst carrier body and the coating is favored.
  • abrasive blasting is understood to mean blasting of chips by means of blasting media which are blasted onto the surface to be treated by means of energy sources in the printing or centrifugal process promoted and accelerated. These methods are used in particular to roughen or smooth the surface, to bring about a change in strength near the surface or to cause deformation of the surface. It is also possible for abrasive blasting to perform several functions at the same time. Abrasive blasting methods in which the surface is roughened are particularly preferred in this case. Sandblasting should be mentioned here as an example.
  • the contour of the surface of the catalyst carrier body is also treated. While in abrasive blasting, the abrasive medium or the abrasive is brought into “unbound” contact with the surface by liquid or gaseous energy carriers, the method uses “cutting.” used “an agent which bonded cutting edges has. this is true for example in certain abrasives in which 'the abrasive and the abrasive grain is anchored on a reference surface (sandpaper, grinding stones, cutters).
  • the coating by between waiters surface and coating are adhesion-promoting structures more firmly connected to the surface.
  • Structures of this type are rod-shaped and preferably have barbs which engage in the coating and are connected to the surface. Structures of this type can be machined from the surface or can be formed from a different material, but adhering better than the coating to the surface, as an intermediate layer.
  • Another possibility for improving the adherence is a galvanic treatment of the surface which, depending on the currents applied, roughen the surface or the rod-shaped structures mentioned above.
  • “Cleaning” of the surface means all processes which, for example, can remove oil, solvents, dirt, oxides or similar contaminants adhering to the surface. The processes washing or pickling are mentioned here as examples.
  • any combination of the individual “adhesion-improving” methods is also possible, although at least the following combinations have already proven to be advantageous (the methods are only identified with the respective letter here): a) + c); a) + c) + d); a) + d); b) + c); b) + c) + d); c) + d).
  • the solid-liquid phase be applied at least according to one of the following steps: spraying, spreading, pouring, dipping. At least one of the steps is preferably repeated at least once.
  • spraying the solid-liquid phase is applied by means of a nozzle, which preferably finely disperses a uniform distribution of the solid-liquid phase on the surface of the catalyst carrier body.
  • the Solid-liquid phase is applied to the surface and then distributed using a suitable tool, but it is also possible that the solid-liquid phase is applied directly to the distribution device and thus comes into contact with the surface of the catalyst carrier body .
  • the solid-liquid phase is simply poured onto the surface, with a suitable distribution of the solid-liquid phase then possibly being effected by a suitable movement of the catalyst carrier body.
  • the solid-liquid phase is also possible for the solid-liquid phase to be provided, for example, in a reservoir and for the surface of the catalyst carrier body to be immersed therein. This immersion is preferably carried out in the case of a catalyst carrier body which is hot above 50 ° C., as a result of which a crust of uniform thickness is formed.
  • a further method for applying the Katalysatorbeschich- v processing provides the screen printing. In this way, the structure of the sieve and the mesh can be used to predetermined the formation of cracks in their spatial configuration.
  • the catalyst support body has a temperature deviating from a room temperature during the application, in particular in a range from 40 ° C. to 800 ° C., preferably in a range from 40 ° C. to 500 ° C. and preferably in one Range from 40 ° C to 250 ° C. Furthermore, it is advantageous that the catalyst support body is moved relative to the source of the solid-liquid phase during application, so that a uniform distribution of the solid-liquid phase takes place on the surface.
  • the catalyst carrier body is dried after the application of the solid-liquid phase. This takes place in particular at temperatures from 20 ° C. to 200 ° C., this drying process preferably extending over a period of 0.5 hours to 168 hours.
  • the catalyst carrier body is very particularly preferably dried in an oxidizing or an inert atmosphere, if appropriate in a vacuum. This can cause, for example, the coating to dry somewhat before the next application step begins. This enables particularly large layer thicknesses to be achieved. These also have a relatively uniform layer thickness over the entire surface.
  • the coating is formed by calcining.
  • the calcining is preferably carried out at temperatures in a range from 200 ° C. to 1,000 ° C., preferably in a range from 210 to 600 ° C. and particularly preferably in a range from 350 to 550 ° C, for a period of 0.5 hour to 24 hours, preferably a period of 1 to 10 hours and particularly preferably a period of 1.1. up to 5 hours.
  • the calcining process may take place in an oxidizing or an inert atmosphere.
  • it is advantageous to vary the temperature during the calcining process in particular with a relatively high rate of temperature change. These sections of the temperature control with a high rate of change may also be followed by outsourcing periods in which the temperature is kept the same.
  • cooling is preferably carried out at a relatively high cooling rate in order to promote crack formation in the coating here as well.
  • the application or calcining processes may be carried out several times. It may be necessary here for the applied coating or the already thermally treated applied coating (again) to be treated with at least one “adhesion-improving” step, the coating preferably subsequently having a surface with an average surface roughness of less than 0 , 2 mm.
  • the applied coating is brought into contact with at least one further solid-liquid phase for the impregnation of catalytically active materials.
  • the impregnated coating be subjected to a thermal treatment. It is particularly advantageous that the impregnated coating is calcined at temperatures of 200 ° C to 1,000 ° C for a period of 1 hour to 24 hours.
  • the applied coating be reduced. This is preferably done in one reducing atmosphere, preferably temperatures in the range of 50 ° C to 650 ° C for a period of 0.5 hour to 24 hours.
  • the catalyst carrier body is at least partially elastically deformed, so that cracks form in the coating.
  • An “elastic” deformation is to be understood in particular to mean those which do not result in permanent deformation of the catalyst carrier body. This relates, for example, to bending stresses, the material of the catalyst carrier body not being stressed beyond the elastic limit. Under certain circumstances it can However, it may also be useful for the catalyst carrier body and the coating to be subsequently adjusted. Not only in this context, it is also possible to at least partially deform the catalyst carrier body in a “plastic” manner, ie to give it a permanent new shape. The deformation (elastic and / or plastic) in turn has the result that tensions, in particular tensile stresses, arise in the catalyst carrier body or the coating, which favor the formation of cracks with regard to the coating.
  • a method for producing an organic organic molecule having at least one double bond and oxygen in which an organic molecule and at least one double bond are brought into contact with one another in the presence of a catalyst support body according to the invention.
  • ⁇ -Olefins are particularly suitable as molecules having double bonds. Among them, propylene is particularly preferred.
  • an organic molecule having at least one double bond and oxygen are brought into contact in at least one reactor of the type described above.
  • a process for producing a water-adsorbing polymer in which an acrylic acid, obtainable as an organic molecule having at least one double bond, is polymerized from the process according to the invention.
  • a water-adsorbing polymer preferably superabsorber, which was produced according to the above method, be incorporated into at least one hygiene article component.
  • a hygiene article component is preferably a diaper or sanitary napkin core.
  • Superabsorbers are water-insoluble, crosslinked polymers which are able to absorb large amounts of water, aqueous liquids, especially body fluids, preferably urine or blood, with swelling and formation of hydrogels, and to retain them under pressure.
  • Superabsorbents preferably absorb at least 100 times their own weight in water. Further details on superabsorbents are disclosed in "Modem Superabsorbent Polymer Technology", F.L. Buchholz, A.T. Graham, Wiley-VCH, 1998 ". Due to these characteristic properties, these water-absorbing polymers are mainly incorporated into sanitary articles such as baby diapers, incontinence products or sanitary napkins.
  • fibers, moldings, films, foams, superabsorbent polymers, detergents, special polymers for the areas of wastewater treatment, emulsion paints, cosmetics, textiles, leather finishing or paper manufacture or hygiene articles are proposed which are based on at least one organic molecule having at least one double bond and oxygen, preferably (meth ) Acrylic acid, based or contain these, which are obtainable by the aforementioned method.
  • an organic molecule having at least one double bond and oxygen is preferred (Meth) acrylic acid, particularly preferably acrylic acid, proposed, obtainable by the process according to the invention for the production of an organic molecule having at least one double bond and oxygen in or for the production of fibers, moldings, films, foams, superabsorbent polymers or hygiene articles, detergents or special polymers for the Areas of wastewater treatment, emulsion paints, cosmetics, textiles, leather finishing or paper production.
  • FIG. 3 schematically shows the structure of a reactor comprising a plurality of catalyst carrier bodies
  • FIG. 6 schematically shows a detail of a further embodiment variant of the catalyst carrier body.
  • Fig. 1 shows schematically and in a perspective view a catalyst carrier body 1, which is designed as a multi-wall sheet metal structure 8.
  • a coating 3 is applied to the surface 2 of the catalyst carrier body 1 and has a multiplicity of cracks 4.
  • the sheet metal construction 8 comprises two sheets which are connected to one another in predetermined connection areas 18. As a result, at least one, preferably a plurality of, essentially parallel channels 9 are formed between the connection regions 18.
  • the channels 9 serve to guide a coolant flow 15 which sets a desired temperature level with respect to the catalytically motivated reaction ,
  • a regular construction of the sheet metal construction 8 is selected, the channels 9 lying next to one another, which have no cross-connection to one another, being spaced apart from one another by the same distance 24. However, this is not absolutely necessary.
  • the catalyst carrier body 1 shown comprises a plurality of plates 10 which form openings 11 through which a fluid can flow. 1 each comprises channels 9 which are separate from one another, here a multiplicity of interconnected cavities are created which allow the coolant flow 15 running between the plate 10 to be mixed.
  • the plates 10 are connected to one another in certain connection areas 18, which are designed here in a punctiform manner. In this case, pillow-shaped cavities or openings 10 are formed, so that a so-called “thermoplate” is formed (as is also the case in FIG. 1).
  • the catalyst carrier body 1, which is embodied here as thermoplate 17, enables the coolant flow to flow evenly 15 in the interior of the thermal plate 17, as indicated by the dashed arrows 1.
  • the coating 3 is provided on the surface 2 of the catalyst carrier body 1, the gas stream 21, which comprises the reactants, preferably in a direction transverse to the coolant stream 15 via the loading - Layering 3 is guided away (principle: "cross-flow heat exchanger” and / or "counter-flow heat exchanger”). This enables a particularly uniform temperature level to be achieved over the entire surface 2.
  • FIG. 3 shows schematically and in detail a reactor 25 with a reaction space 12 which is delimited by a wall 16.
  • the wall 16 fixes a plurality of thermal sheets 17, which are arranged at regular intervals 23 from one another.
  • the thermal plates 17 in turn form openings 11 through which the coolant flow 15 (as marked) can flow.
  • the gas stream 21, which comprises an organic molecule having at least one double bond and the oxygen, is, if possible, guided along it along the coating 3 of the thermal plates 17. This will promote the exothermic reaction.
  • the connection areas 18 of the thermal plates 17 are arranged such that the pillow-shaped openings 11 lie essentially in one plane 22.
  • the openings 11 or the connecting regions 18 are arranged offset from one another with respect to adjacent thermal plates 17, for example in order to achieve a constant distance 23 over the entire surface 2.
  • the distances preferably range from 50 ⁇ m to 1.5 cm, preferably from 500 ⁇ m to 5 mm and particularly preferably from 750 ⁇ m to 2 mm.
  • FIG. 4 schematically shows an image of a coating 3 with cracks 4 produced in Example 2.
  • the cracks 4 each have a length 5.
  • the individual lengths 5 of the cracks 4 are added in such a recording, the absolute total crack length resulting therefrom being related to the reference area of one square meter.
  • relatively long cracks can be seen, which may be related to one another.
  • This slurry was applied to a catalyst carrier body, which corresponds essentially to the construction from FIG. 2.
  • An area of 32 mm 2 was considered here.
  • the cracks were measured by tracing them and adding them up.
  • the addition of the crack lengths in this image section resulted in an absolute total crack length of 27,512 ⁇ m. This corresponds to a unit area
  • FIG. 5 likewise shows schematically a picture of a further coating 3 according to Example 3 with cracks 4.
  • the cracks 4 shown are noticeably shorter, but instead a significantly higher number of cracks 4 can be seen here than in FIG. 4.
  • FIG. 6 schematically shows a detail of an embodiment variant of a catalyst carrier body 1.
  • a part of a plate 10 is shown, on the surface 2 of which the coating 3 is provided.
  • the coating 3 has several cracks 4, which have a width 19 and extend over at least 80% of the layer height 6.
  • the coating 3 also comprises various constituents 7, which include a catalytic reaction of an organic having at least one double bond Favor molecule with oxygen.
  • the plate 10 is designed here with a sheet thickness 14 which is in the range from 100 ⁇ m to 50 mm.
  • the coolant 20 is arranged, which optionally flows along the inner side of the plate 10 and thus ensures uniform removal of the heat generated by the catalytic reaction.
  • heating was carried out at a heating rate of 120 K / min to 550 ° C., followed by heating at a heating rate of 2 K / min to 570 ° C. This temperature was held for 30 minutes and then cooled to room temperature at a cooling rate of 5 K / min over 10 minutes and then an exponentially slowing cooling rate.
  • the adhesion was less than 10 N / m 2 .

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Abstract

La présente invention concerne un corps de support de catalyseur (1) comprenant une surface (2) qui présente un revêtement (3) lié à la surface. Le revêtement (3) présente des fentes (4) d'une certaine longueur (5). Ces longueurs forment une longueur de fente totale d'au moins 500 m/m<2> (mètres par mètre carré). Le revêtement (3) présente une résistance à l'arrachement d'au moins 500 N/m<2> (Newton par mètre carré). De tels corps de support de catalyseur servent à la transformation catalytique de partenaires de réaction, par exemple lors de l'oxydation partielle de propène et d'acroléine ou d'acide acrylique. La présente invention concerne également un procédé pour produire un revêtement pour un corps de support de catalyseur, un procédé pour produire une molécule organique qui présente au moins une double liaison et de l'oxygène, un procédé pour produire un polymère hydroabsorbant, un procédé pour produire un produit hygiénique hydroabsorbant, ainsi que des produits chimiques ou l'utilisation d'acide (méth)acrylique dans des produits chimiques.
EP04763669A 2003-07-31 2004-07-30 Corps de support de catalyseur a revetement Withdrawn EP1648602A1 (fr)

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DE10335510A DE10335510A1 (de) 2003-07-31 2003-07-31 Beschichteter Katalysator-Trägerkörper
PCT/EP2004/008590 WO2005011858A1 (fr) 2003-07-31 2004-07-30 Corps de support de catalyseur a revetement

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US20060276334A1 (en) 2006-12-07
CN1832799A (zh) 2006-09-13
BRPI0413096A (pt) 2006-10-03
WO2005011858A1 (fr) 2005-02-10
ZA200601079B (en) 2007-09-26
DE10335510A1 (de) 2005-03-10
JP2007500588A (ja) 2007-01-18

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