WO2008019857A1 - Procédé pour revêtir ou imprégner un support de catalyseur - Google Patents

Procédé pour revêtir ou imprégner un support de catalyseur Download PDF

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Publication number
WO2008019857A1
WO2008019857A1 PCT/EP2007/007250 EP2007007250W WO2008019857A1 WO 2008019857 A1 WO2008019857 A1 WO 2008019857A1 EP 2007007250 W EP2007007250 W EP 2007007250W WO 2008019857 A1 WO2008019857 A1 WO 2008019857A1
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WO
WIPO (PCT)
Prior art keywords
catalyst support
coating
catalyst
air
face
Prior art date
Application number
PCT/EP2007/007250
Other languages
German (de)
English (en)
Inventor
Olaf Helmer
Original Assignee
Süd-Chemie AG
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 Süd-Chemie AG filed Critical Süd-Chemie AG
Publication of WO2008019857A1 publication Critical patent/WO2008019857A1/fr

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Classifications

    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • 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
    • 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
    • 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
    • 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
    • B01J37/024—Multiple impregnation or coating
    • B01J37/0244—Coatings comprising several layers
    • 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
    • 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
    • B01J23/20—Vanadium, niobium or tantalum
    • B01J23/22—Vanadium
    • 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
    • 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
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals

Definitions

  • the present invention relates to a method of coating or impregnating a catalyst carrier having an entrance end face and an exit end face.
  • Combustion engines are catalysts used, which generally have a honeycomb catalyst support on which a catalytically active coating is deposited.
  • the catalytically active coating is usually applied to the catalyst support by first coating the catalyst support with a catalytically inactive porous support oxide such as Al 2 O 3 and then impregnating the dried and / or calcined coating with a catalytically active component or precursor thereof ,
  • a catalytically inactive porous support oxide such as Al 2 O 3
  • processes are also known in the prior art in which the catalytically active coating is applied by means of a carrier oxide and a coating dispersion containing a catalyst or a precursor thereof in one step.
  • honeycomb catalyst supports usually have a cylindrical shape and are based on their
  • Gas inlet end face through to its gas outlet end of parallel aligned flow channels for the passage of exhaust gases.
  • the density of the flow channels seen over the cross section of the catalyst support is also referred to as cell density and is usually between 30 and 1000 cpsi.
  • the catalyst supports themselves are usually formed from a ceramic or a metallic material and have different geometries, from round to oval, cylindrical, etc.
  • DE 40 401 50 C2 describes a process for the uniform loading of a honeycomb body as a catalyst support made of ceramic or metal with a dispersion coating, in which the honeycomb body is introduced into a same diving chamber and the coating dispersion is pumped from below into the honeycomb body. After pumping the honeycomb body and removal from the dipping chamber of the honeycomb body is removed by blowing or suction of excess dispersion.
  • EP 0 980 710 B1 describes a method for coating the inner flow channels of a monolithic, cylindrically shaped catalyst support with a coating dispersion, wherein the support has two end faces which are interconnected by flow channels arranged parallel to the cylinder axis.
  • the catalyst support is oriented vertically, a predetermined amount of the coating dispersion on the upper end face of the Abandoned support body, ie the channels are completely filled with the coating dispersion or covered and then sucked through the flow channels, wherein excess coating dispersion is removed from the flow channels by suction of the flow channels.
  • Coating dispersion is drawn through the flow channels at a flow rate of 0.1 to 1 m / s, and after completion of the suction suction, excess coating dispersion is removed from the flow channels by applying a suction pulse from below, the suction air passing at a flow rate between 40 and 1 m / s the flow channels are sucked and the excess coating dispersion discharged with the air stream is separated from the air flow within a time of less than 100 ms after exiting from the catalyst support body.
  • EP 0 941 763 B1 relates to a method for coating the flow channels of a cylindrically shaped, honeycomb catalyst body with a dispersion coating by filling the vertically oriented flow channels with a filling amount of the coating dispersion through the lower end face of the catalyst body and then draining and sucking down the flow channels and drying and calcining the catalyst body.
  • the flow channels are filled with a filling amount up to
  • Flow channels through a suction pulse which is generated by connecting a vacuum tank with the lower end face of the catalyst body, emptied and freed, wherein the time between the start of the filling process and the end of the emptying is not more than 5 seconds.
  • Flow channels of monolithic disk-shaped catalyst support body of generally cylindrical cross-section which are traversed by the inlet end face to the outlet end face of the flow channels, using a coating dispersion of finely divided inorganic materials and / or their precursors.
  • the application of the dispersion coating on the channel walls of the flow channels takes place in such a way that the coating dispersion is sprayed or sprayed onto the end faces of the support body.
  • Outer walls of the catalyst support body are inevitably coated or areas on the outer walls of the catalyst carrier body, which should remain free of coatings, must be provided with protective layers.
  • Inlet end face and an outlet end face in particular a metal foam
  • Catalyst carrier of greater length by applying a suctioning air flow at the outlet end side of the catalyst carrier and introducing a
  • the coating dispersion or the impregnation solution is preferably sprayed or atomized in the direction of the inlet end face by means of a spraying or misting device.
  • the coating dispersion or the impregnation solution is sprayed or atomized by means of a multi-component nozzle, preferably a two-component nozzle, wherein the air used is preferably presaturated with the corresponding solvent.
  • catalyst support is preferably understood as meaning both wallflow filters and open-pore foam structures, e.g. Metal foams, microstructures, such as microfluidic devices, as well as any form of monolithic support structures understood, for example, have parallel aligned channels, which can be conductively connected to each other or contain specific installations for gas turbulence.
  • open-pore foam structures e.g. Metal foams, microstructures, such as microfluidic devices, as well as any form of monolithic support structures understood, for example, have parallel aligned channels, which can be conductively connected to each other or contain specific installations for gas turbulence.
  • inlet and outlet end for example, in a monolithic catalyst carrier can be assigned to both faces in any way and are not related to the terms gas inlet and gas outlet end side, which relate to a ready-made catalyst in use.
  • aqueous coating dispersions or impregnating solutions are preferably used. To achieve special coating properties or when using certain coating materials or
  • catalysts or catalyst precursors can also be used in the same way as liquids other than solvents, or additives such as pore formers or viscosity regulators can be added.
  • Preferred solvents are also organic solvents such as alcohols or mixtures thereof with water.
  • Preferred pore formers are, for example, burnable polymers and suitable viscosity regulators are acids, alkalis, surfactants and additions of organic solvents.
  • the applied sucking air flow is at least equal to the flow of air / coating dispersion or air / impregnation solution entering the catalyst support via the inlet end face.
  • the catalyst supports preferably to be coated or impregnated with the method preferably have a length of greater than 50 mm, preferably a length of 60 to 300 mm and particularly preferably a length of 70 to 150 mm, from the inlet end face to the outlet end face.
  • the maximum coatable by the method according to the invention Length of the support usually depends on various parameters, such as the free cross-section of the flow channels, the cell density, the material of the catalyst support, for example, its suction behavior, the spray or nebulization technique, the viscosity of the
  • Coating dispersion or the impregnating solution as well as the droplet size of the respective spray and the amount (m 3 / h) of the intake air flow In the case of less porous catalyst support materials, for example, it is possible to coat longer catalyst supports than with highly porous material.
  • the abovementioned maximum length can be almost doubled in accordance with a likewise preferred embodiment of the method according to the invention if the method is carried out on a catalyst support twice in succession from different end faces, ie in a second application of the method to a method according to the invention
  • Subjected catalyst carrier inlet face for dispersion or solution and exit face for the sucking air flow are interchanged.
  • partial i. are not over the entire length or the entire cross-section of the catalyst support extending coatings or impregnations are made. This can be achieved, for example, via the process duration and / or the size of the applied intake air flow (GHSV) or via partial covers of the inlet end face.
  • GHSV applied intake air flow
  • dew point refers to the temperature T in a gas / vapor mixture where the gas is just saturated with the vapor, and when cooled below the dew point, the vapor usually precipitates as a mist or dew.
  • suspending agent is thereby obtained by enriching the air with suspending agent, preferably in the form of steam. Even when working above the dew point thus a very slow drying of deposited excess coating dispersion or impregnation solution can be achieved and thus the formation of the Baumkuchen bines largely avoidable.
  • the method is carried out by means of a device, one or more of which
  • Component components are heated to a temperature corresponding to the dew point of the solvent of the coating dispersion or to an underlying temperature or to a temperature corresponding to the dew point of the solvent of the impregnating solution or to an underlying temperature. It is generally crucial that the surfaces of the component components are heated to an appropriate temperature, which can come into contact with the coating dispersion or with the impregnating solution.
  • component components of a device for carrying out the method according to the invention for example by the ambient temperature or by the waste heat of units, such as pumps or fans, can be heated. Deposited on the respective component components
  • Coating dispersion or impregnation solution can release solvent due to this heating to the air which is constantly being introduced into this device, for example the suction device, so that an increased coating or impregnation of the corresponding component components (the so-called tree cake effect) can occur.
  • a temperature control of one or more component components of a device for carrying out the method according to the invention at a temperature corresponding to the dew point counteracts vaporization of the solvent deposited on the corresponding component components of the coating dispersion or the impregnation solution, thereby producing a coating or impregnation of the component components is avoided and the coating dispersion or impregnation solution after the deposition (in a separator), in particular noble metal solution, can be recovered.
  • the method can be carried out by means of a device, of which one or more component components to a temperature of more than 1 0 according to a particularly preferred embodiment of the method C are temperature below the dew point of the solvent of the coating dispersion or below the dew point of the solvent of the impregnating solution, preferably to a temperature of more than 2 0 C below the dew point, more preferably to a temperature of more than 3 0 C below the dew point, particularly preferably to a temperature of more than 4 0 C below the dew point, more preferably to a temperature of more than 5 0 C below the dew point, most preferably to a temperature of more than 6 0 C below the dew point.
  • a device of which one or more component components to a temperature of more than 1 0 according to a particularly preferred embodiment of the method C are temperature below the dew point of the solvent of the coating dispersion or below the dew point of the solvent of the impregnating solution, preferably to a temperature of more than 2 0 C below the
  • Air / impregnating solution mixture or to the establishment of the sucking air flow are, preferably the suction shaft.
  • the method is carried out by means of a device, of which one or more component components are designed to be temperable.
  • a device of which one or more component components are designed to be temperable.
  • the component component (s) can be tempered to dew point temperature or to a temperature below the dew point.
  • the component components are formed for example in the form of a double jacket, within which a cooling liquid can circulate.
  • the pressure caused in the carrier is less than 1000 mbar and preferably 700 to 1000 mbar due to the application of the sucking air flow at the outlet end side of the catalyst carrier.
  • the pressure caused in the carrier by the application of the sucking air flow at the outlet end face of the catalyst carrier is 850 to 950 mbar. It has been found that particularly uniform coating thicknesses or impregnations of porous catalyst supports can be achieved in this pressure range.
  • the diameter of the flow channels of the catalyst support is 200 microns to 1.2 mm.
  • Catalyst carriers with corresponding flow channels are penetrated particularly well by the process according to the invention by the coating dispersion or the impregnation solution, whereby a substantially uniform coating or impregnation of the (in this case porous) catalyst support also over a relatively large wall thickness of the catalyst support or its channels can be guaranteed.
  • the air / coating dispersion or air / impregnation solution mixture introduced into the catalyst support via the inlet end face has drops with an average diameter of 50 micrometers to 900 micrometers. Drops with a mean diameter of the aforementioned size are suitable for evenly coating or impregnating even deep-lying inner cavities of the catalyst carrier walls.
  • the coating dispersion is a so-called washcoat dispersion.
  • Washcoat dispersions are known in the art. They usually contain water as a solvent and inorganic components such as extremely fine-grained metal oxides, e.g. Titanium dioxide or aluminum oxides with which the catalyst support is to be coated. These may also be sol-gel systems in particular.
  • the washcoat may also contain catalytically active metal compounds, such as subgroup metal or noble metal compounds, e.g. Compounds of Mo, V, W, Pt, Pd, Rh, etc., alone or in mixture, or precursors of catalytically active compounds.
  • catalytically active metal compounds such as subgroup metal or noble metal compounds, e.g. Compounds of Mo, V, W, Pt, Pd, Rh, etc., alone or in mixture, or precursors of catalytically active compounds.
  • Further inorganic components of the washcoat dispersion are, for example, finely divided and high surface area oxides such as aluminum oxide, silicon dioxide, rare earth oxides, titanium dioxide, zeolites, nickel oxide, iron oxide, alkaline earth metal oxide, molybdenum oxide and tungsten oxide, suicides such as molybdenum silicide, metals such as platinum, palladium, rhodium and / or compounds thereof.
  • These substances may be wholly or partly as oxides and / or as any soluble and / or insoluble Compounds, for example as nitrates, acetates, oxalates, tartrates, formates, carbonates or hydroxides in the dispersion.
  • Catalyst formulations are preferably used with optionally stabilized aluminum oxide and cerium oxide, zirconium oxide, rare earth oxides, alkaline earth metal oxides, platinum metals and / or their precursors.
  • washcoat dispersions also contain dispersants to stabilize the washcoat dispersion. It has been found that washcoat dispersions, despite their relatively high solids content, can be applied in a particularly simple and uniform manner to a catalyst support by means of the process according to the invention.
  • impregnating solution is to be understood as meaning a metal-containing impregnating solution in which a soluble metal compound of a catalytically active metal is contained, or a precoat solution or dispersion in which a binder or a bonding agent is contained, or a mixture of the aforementioned solutions and dispersions.
  • a precoat solution or dispersion containing an adhesion promoter for the coating can be applied to the catalyst support.
  • a washcoat dispersion as a coating dispersion to the catalyst support.
  • the coated catalyst support can either be impregnated directly with a metal-containing impregnation solution or else beforehand with a binder or an adhesion promoter for the polymer corresponding metal-containing precoat solution or dispersion.
  • the impregnating solution is a mixture of a metal-containing impregnating solution with a precoat solution or dispersion.
  • the binder or the adhesion promoter particularly preferably contains an organic or an inorganic component. It has been found that such mixtures are particularly suitable for carrying out the process according to the invention.
  • Catalyst supports can be formed of any metal or metal alloy and made, for example, by extrusion or winding or stacking or folding metal foils.
  • Known for the field of emission control are temperature-resistant alloys with the main components
  • catalyst supports with slots, perforations, perforations and embossments in the metal foil can also be coated or impregnated with very good results.
  • catalyst supports of ceramic material can be used. Often the ceramic material will be an inert low surface area material such as cordierite, mullite, alpha alumina or silicon carbide. However, the used
  • Catalyst support also consist of insecticide material such as gamma-alumina.
  • Coating or provided with its precursor ceramic or metallic catalyst support in the process according to the invention may be appropriate, for example, in achieving particular catalytic effects, for example, to achieve a partial conversion of a particular one
  • the process of the present invention also makes it easy to disperse an uneven coating over the catalyst carrier cross-section achieve, for example, a coating thickening in the direction of the support center to improve the flow distribution of the gas to be catalytically treated.
  • coating and impregnation gradients can be adjusted over the length of the catalyst support, for example, by varying the process duration or the intake air flow accordingly.
  • a further embodiment of the invention is that the inventive method is carried out on a catalyst support twice from changing end faces, ie, that in a second application of the method to a process carrier already subjected catalyst support inlet face for dispersion or solution and exit face for the sucking air flow are interchanged, wherein in the respective processes from each other different catalytically active species are applied, so as to obtain a catalyst system with dual function.
  • exhaust catalysts can be obtained, which perform a NO x reduction in a first and an oxidation in a second catalyst section.
  • Protective coatings usually have the task of catching the catalyst poisons in whole or in part by their high surface area structure and not to the catalytically active Component penetrate.
  • the invention further relates to the use of a catalyst support coated or impregnated by the process according to the invention in the exhaust gas purification.
  • Catalysts which have been prepared by the process according to the invention are suitable for carrying out a wide variety of substance conversions.
  • coated and / or impregnated catalysts according to the invention can be used for exhaust gas purification.
  • the application for the pollutant conversion of exhaust gases of internal combustion engines is preferred.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)

Abstract

La présente invention concerne un procédé pour revêtir ou imprégner un support de catalyseur, lequel comporte une face frontale d'entrée et une face frontale de sortie. Le procédé selon l'invention permet de revêtir et/ou d'imprégner de manière homogène les supports de catalyseur d'une plus grande longueur, au moyen d'un mélange d'air et de substance de revêtement en dispersion et/ou d'air et de solution d'imprégnation. À cet effet, le procédé comprend les étapes suivantes : a) préparation d'un support de catalyseur qui comporte une face frontale d'entrée et une face frontale de sortie, en particulier d'une mousse métallique; b) application d'un courant d'air aspirant au niveau de la face frontale de sortie du support de catalyseur; c) introduction d'un mélange d'air et de substance de revêtement en dispersion et/ou d'air et de solution d'imprégnation dans le support de catalyseur par la face frontale d'entrée lorsque le courant d'air aspirant est appliqué, jusqu'à ce que le support de catalyseur soit revêtu et/ou imprégné.
PCT/EP2007/007250 2006-08-17 2007-08-16 Procédé pour revêtir ou imprégner un support de catalyseur WO2008019857A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006038406A DE102006038406A1 (de) 2006-08-17 2006-08-17 Verfahren zum Beschichten oder Imprägnieren eines Katalysatorträgers
DE102006038406.7 2006-08-17

Publications (1)

Publication Number Publication Date
WO2008019857A1 true WO2008019857A1 (fr) 2008-02-21

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PCT/EP2007/007250 WO2008019857A1 (fr) 2006-08-17 2007-08-16 Procédé pour revêtir ou imprégner un support de catalyseur

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DE (1) DE102006038406A1 (fr)
WO (1) WO2008019857A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2172266A1 (fr) 2008-09-12 2010-04-07 Süd-Chemie Ag Catalyseur d'hydrolyse d'urée
US10814318B2 (en) 2014-03-25 2020-10-27 Johnson Matthey Public Limited Company Method for coating a filter substrate

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008013541B4 (de) * 2008-03-11 2014-05-15 Süd-Chemie AG Abgasreinigungssystem zur selektiven katalytischen Reduktion von Stickoxiden, Verfahren und Verwendung
DE102008055890A1 (de) 2008-11-05 2010-05-12 Süd-Chemie AG Partikelminderung mit kombiniertem SCR- und NH3-Schlupf-Katalysator
DE102013013973A1 (de) 2013-08-23 2015-02-26 Clariant Produkte (Deutschland) Gmbh Partikelfilter zur Reinigung von Abgasen, Abgasreinigungssystem und Verfahren zur Reinigung von Abgas

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4609563A (en) * 1985-02-28 1986-09-02 Engelhard Corporation Metered charge system for catalytic coating of a substrate
WO1999047260A1 (fr) * 1998-03-19 1999-09-23 Johnson Matthey Public Limited Company Appareil de revetement de support monolithique et son procede de fabrication
US20050136183A1 (en) * 2003-12-18 2005-06-23 Dawes Steven B. Method for preparing catalysts
WO2007057209A1 (fr) * 2005-11-17 2007-05-24 Süd-Chemie AG Procede pour appliquer une substance de revetement contenant un solvant sur une structure de support d'epuration de gaz d'echappement
WO2007057210A1 (fr) * 2005-11-17 2007-05-24 Süd-Chemie AG Procede pour revetir ou impregner la surface d'un support de catalyseur

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4609563A (en) * 1985-02-28 1986-09-02 Engelhard Corporation Metered charge system for catalytic coating of a substrate
WO1999047260A1 (fr) * 1998-03-19 1999-09-23 Johnson Matthey Public Limited Company Appareil de revetement de support monolithique et son procede de fabrication
US20050136183A1 (en) * 2003-12-18 2005-06-23 Dawes Steven B. Method for preparing catalysts
WO2007057209A1 (fr) * 2005-11-17 2007-05-24 Süd-Chemie AG Procede pour appliquer une substance de revetement contenant un solvant sur une structure de support d'epuration de gaz d'echappement
WO2007057210A1 (fr) * 2005-11-17 2007-05-24 Süd-Chemie AG Procede pour revetir ou impregner la surface d'un support de catalyseur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2172266A1 (fr) 2008-09-12 2010-04-07 Süd-Chemie Ag Catalyseur d'hydrolyse d'urée
DE102008046994A1 (de) 2008-09-12 2010-06-02 Süd-Chemie AG Harnstoff-Hydrolyse-Katalysator
US10814318B2 (en) 2014-03-25 2020-10-27 Johnson Matthey Public Limited Company Method for coating a filter substrate
US11724251B2 (en) 2014-03-25 2023-08-15 Johnson Matthev Public Limited Comoanv Apparatus for coating a filter substrate

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