WO2001049411A1 - Method for producing a honeycomb, using metal sheets which have already been coated with wash-primer - Google Patents

Method for producing a honeycomb, using metal sheets which have already been coated with wash-primer Download PDF

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Publication number
WO2001049411A1
WO2001049411A1 PCT/EP2000/013102 EP0013102W WO0149411A1 WO 2001049411 A1 WO2001049411 A1 WO 2001049411A1 EP 0013102 W EP0013102 W EP 0013102W WO 0149411 A1 WO0149411 A1 WO 0149411A1
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WO
WIPO (PCT)
Prior art keywords
wash
carrier matrix
coated
metal foils
primer
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PCT/EP2000/013102
Other languages
German (de)
French (fr)
Inventor
Martin Heinrich
Original Assignee
Emitec Gesellschaft Für Emissionstechnologie Mbh
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Publication date
Application filed by Emitec Gesellschaft Für Emissionstechnologie Mbh filed Critical Emitec Gesellschaft Für Emissionstechnologie Mbh
Priority to AU23677/01A priority Critical patent/AU2367701A/en
Publication of WO2001049411A1 publication Critical patent/WO2001049411A1/en

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Classifications

    • B01J35/56—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8643—Removing mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
    • B01D53/8646—Simultaneous elimination of the components
    • B01D53/8653—Simultaneous elimination of the components characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
    • B23K1/0014—Brazing of honeycomb sandwich structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • F01N2330/04—Methods of manufacturing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/44—Honeycomb supports characterised by their structural details made of stacks of sheets, plates or foils that are folded in S-form

Definitions

  • the invention relates to a method for producing a honeycomb body, in particular a catalyst support body, with a support matrix layered and / or wound or folded from at least partially structured sheet metal foils with a plurality of channels through which a fluid can flow, the sheet metal foils having end regions which are joined to a jacket in terms of joining technology and / or are connected in a form-fitting manner, in which a suitable number of sheet foils which are at least partially structured, in total or already coated with wash coat, are layered and / or wound or folded to form the carrier matrix of the honeycomb body; and at a later time the carrier matrix is positioned in the jacket and connected to it.
  • the surface of the channels of the honeycomb body must be as large as possible. This increase in surface area of the carrier matrix is achieved with an intermediate layer, the so-called wash coat, a mixture of, for example, gamma-aluminum oxide and other oxides.
  • this intermediate layer With a single gram of this intermediate layer, an area of up to 25 m 2 can be achieved, which means an increase in the receiving area for the catalytically active layer by seven thousand times.
  • the catalytically active layer is then applied to this three-dimensional, jagged surface.
  • it consists predominantly of platinum, rhodium or paladium and also of oxides of base metals.
  • the sheet metal foils can thus be coated before they are layered and / or wound to form a carrier matrix or only afterwards.
  • the invention is based on the idea that the sheet-metal foils coated with wash coat, at least on one side, preferably on both sides, with their layering, winding and / or folding to form the carrier matrix of the honeycomb body and / or before and / or after their positioning as a carrier matrix in the jacket to treat a fixative.
  • a fixing agent has been found to be advantageous which contains polymers which have ionic or, for example in aqueous solution, ionizable, in particular neutralizable, groups such as polyvenylpyrrone.
  • the fixing agent can also contain polymerates of ethylenically unsaturated acids such as acrylic acid, methacrylic acid or crotonic acid.
  • the polymers and / or the polymerates are preferably copolymerized with vinyl acetate.
  • Fig. 3 shows schematically a honeycomb body made therefrom by intertwining in opposite directions.
  • FIG. 1 shows an example of a sheet metal foil 2 that has already been coated on both sides with a wash coat, the uncoated end regions 7, 8 of which are later to be joined, in particular soldered, welded or glued, in particular with a jacket 6.
  • the wash coat was applied to the semi-finished product using a suitable device.
  • the end regions 7, 8 were shielded accordingly, so that the uncoated regions 7, 8 remain here.
  • the sheet metal foil 2, 3 as a whole is first coated with wash coat and the end regions 7, 8 are subsequently freed from the wash coat by a chemical or mechanical method. This can be done one after the other for the sheets 2, 3 or more simply if the sheets before 2, 3 have already been processed further to form a carrier matrix 4, for example by simply brushing off the ends of the sheet metal foils 2, 3 which have been further processed to form the carrier matrix 4.
  • FIG. 2 shows a stack 9 with the height h and the length L, which is composed of alternating layers of smooth 2 and structured 3 sheet metal foils already coated with wash coat.
  • a stack 9 is fixed by means of a fork (not shown) or a similar one Device at the fixed points 1 1, 12 and devoured in opposite directions by turning the fork or bending or folding the stack ends.
  • Sheet metal foils 2, 3, which are intertwined to form a carrier matrix 4 can be fastened in a jacket 6 by joining technology, as a result of which an elastic, but nevertheless stable honeycomb body 1, in particular a catalyst carrier body, is produced.
  • the individual sheet metal foils 2, 3 can be soldered to one another on the end face, preferably in an annular edge zone region 13. In this way, a stable structure is created even if individual sheet metal foils 2, 3 should not touch the jacket 6 due to length deviations.
  • the wash-coat is coated according to the invention
  • Sheet metal foils 2, 3 are treated at least on one side, preferably on both sides, with a fixing agent before their layering, winding and / or folding to form the carrier matrix 4 of the honeycomb body 1 and / or before and / or after their positioning as a carrier matrix 4 in the jacket 6.
  • the method according to the invention thus advantageously promotes a permanent connection of a carrier matrix 4 to a jacket 6 by avoiding harmful deposits, in particular wash coat particles formed during production.

Abstract

The aim of the invention is to ensure that end regions (7, 8) of at least partially structured metal sheets (2, 3) which have already been coated with wash-primer remain devoid of wash-primer dust during the production of a honeycomb (1). To this end, the metal sheets (2, 3) coated with wash-primer are treated with a fixing agent at least on one side, preferably on both sides, before being layered, wound and/or folded to form a support matrix (4) of the honeycomb (1), and/or before and/or after being positioned in a casing (6) in the form of said support matrix (4). The inventive method prevents the formation of dust and enables a support matrix (4) to be permanently secured to a casing (6) in an advantageous manner, by preventing harmful deposits, in particular of wash-primer particles which are formed during the production process.

Description

Verfahren zur Herstellung eines Wabenkörpers unter Verwendung schon mit Wash-Coat beschichteter Blechfolien Process for the production of a honeycomb body using sheet metal foils already coated with wash coat
Die Erfindung betrifft ein Verfahren zur Herstellung eines Wabenkörpers, insbesondere eines Katalysatorträgerkörpers, mit einer aus zumindest teilweise strukturierten Blechfolien geschichteten und/oder gewickelten bzw. gefalteten Trägermatrix mit einer Vielzahl für ein Fluid durchströmbarer Kanäle, wobei die Blechfolien Endbereiche aufweisen, die an einem Mantel fügetechnisch und/oder form- schlüssig angebunden sind, bei dem zunächst eine geeignete Anzahl zumindest teilweise strukturierter, insgesamt oder bis auf die Endbereiche schon mit Wash- Coat beschichteter Blechfolien zu der Trägermatrix des Wabenkörpers geschichtet und/oder gewickelt bzw. gefaltet werden; und zu einem späteren Zeitpunkt die Trägermatrix im Mantel positioniert und an diesem angebunden wird.The invention relates to a method for producing a honeycomb body, in particular a catalyst support body, with a support matrix layered and / or wound or folded from at least partially structured sheet metal foils with a plurality of channels through which a fluid can flow, the sheet metal foils having end regions which are joined to a jacket in terms of joining technology and / or are connected in a form-fitting manner, in which a suitable number of sheet foils which are at least partially structured, in total or already coated with wash coat, are layered and / or wound or folded to form the carrier matrix of the honeycomb body; and at a later time the carrier matrix is positioned in the jacket and connected to it.
Bei der Verbrennung fossiler Brennstoffe entsteht nicht nur Wärme sondern auch Abgas. Da die chemischen Verbindungen dieser Abgase als umweltschädlich erkannt wurden, ist eine Reduzierung dieser Schadstoffe sinnvoll, insbesondere hinsichtlich der Schadstoffe Kohlenwasserstoff (HC), Kohlenmonoxid (CO) und Strickoxid (NOx).When fossil fuels are burned, not only heat but also exhaust gas is generated. Since the chemical compounds of these exhaust gases have been recognized as harmful to the environment, a reduction of these pollutants makes sense, especially with regard to the pollutants hydrocarbon (HC), carbon monoxide (CO) and knitting oxide (NO x ).
Als wirksamstes System zum Abbau dieser Schadstoffe hat sich die katalytisch bewirkte chemische Umwandlung der schädlichen Verbindungen in umweltfreundliche Komponenten durchgesetzt. Dabei verwandeln sich Kohlenmonoxid (CO) und Kohlenwasserstoff (HC) durch Oxidation in Kohlendioxid und Wasserdampf, während sich aus den Stickoxiden durch Reduktion Stickstoff ergibt.The most effective system for breaking down these pollutants has been the catalytic chemical conversion of the harmful compounds into environmentally friendly components. Carbon monoxide (CO) and hydrocarbon (HC) are transformed into carbon dioxide and water vapor by oxidation, while nitrogen oxides result from nitrogen reduction.
Derartige Umwandlungsvorgänge spielen sich permanent auch in der Natur ab, allerdings auf Umwegen und viel langsamer. In einem modernen Katalysatorträ- gerkörper mit großer Oberfläche dagegen gleicht die Reaktionsgeschwindigkeit einem Zeitraffer: Nach dem Durchströmen des Katalysatorträgerkörpers sind die Abgase nahezu vollständig schadstoffgereinigt.Such transformation processes are also permanent in nature, but in a detour and much more slowly. In contrast, in a modern catalyst carrier body with a large surface area, the reaction rate is the same a time-lapse: after flowing through the catalyst carrier body, the exhaust gases are almost completely cleaned of pollutants.
Um die Kontaktchance der im Abgasstrom befindlichen Schadstoffe mit einer katalytisch wirksamen Beschichtung zu optimieren, muß die Oberfläche der Kanäle des Wabenkörpers so groß wie irgend möglich sein. Diese Oberflächenver- größerung der Trägermatrix wird mit einer Zwischenschicht, dem sogenannten Wash-Coat, erreicht, einem Gemisch beispielsweise aus Gamma- Aluminium-Oxid und anderen Oxiden.In order to optimize the chance of contact of the pollutants in the exhaust gas stream with a catalytically active coating, the surface of the channels of the honeycomb body must be as large as possible. This increase in surface area of the carrier matrix is achieved with an intermediate layer, the so-called wash coat, a mixture of, for example, gamma-aluminum oxide and other oxides.
Mit einem einzigen Gramm dieser Zwischenschicht kann eine Fläche bis zu 25 m2 erreicht werden, was einer Vergrößerung der Aufnahmefläche für die katalytisch aktive Schicht um das Siebentausendfache bedeutet. Auf diese dreidimensionale zerklüftete Oberfläche wird dann die katalytisch wirksame Schicht aufgetragen. Sie besteht beispielsweise überwiegend aus Platin, Rhodium oder Paladium sowie auch aus Oxiden unedler Metalle.With a single gram of this intermediate layer, an area of up to 25 m 2 can be achieved, which means an increase in the receiving area for the catalytically active layer by seven thousand times. The catalytically active layer is then applied to this three-dimensional, jagged surface. For example, it consists predominantly of platinum, rhodium or paladium and also of oxides of base metals.
Für die Beschichtung der Blechfolien mit dem Wash-Coat sind grundsätzlich wenigstens zwei Möglichkeiten gegeben. So kann die Beschichtung der Blechfolien vor ihrer Schichtung und/oder Wicklung zu einer Trägermatrix erfolgen oder erst danach.There are basically at least two options for coating the metal foils with the wash coat. The sheet metal foils can thus be coated before they are layered and / or wound to form a carrier matrix or only afterwards.
In der Praxis hat sich für manche Fälle die Beschichtung der Blechfolien mit Wash-Coat vor ihrer Schichtung und/oder Wicklung zu einer Trägermatrix als vorteilhaft herausgestellt, wobei dem Vorteil insbesondere der gleichmäßigeren Verteilung der Beschichtung auf den strukturierten und glatten Blechfolien der Nachteil gegenüber steht, daß bei der anschließenden Verarbeitung der beschichteten Blechfolien zu einer Trägermatrix Wash-Coat-Staub entstehen kann. Dieser gelangt in die Umgebung und setzt sich auch auf die Endbereiche der Blechfolien, die für eine spätere fügetechnische Verbindung der Blechfolien an einem Mantelrohr möglichst von Verunreinigungen aller Art freizuhalten sind.In practice, coating the sheet metal foils with wash-coat prior to their layering and / or winding into a carrier matrix has proven to be advantageous in some cases, the disadvantage being the disadvantage, in particular, of the more uniform distribution of the coating on the structured and smooth sheet metal foils, that during the subsequent processing of the coated sheet metal foils into a carrier matrix, wash-coat dust can arise. This gets into the environment and also sits on the end areas of the metal foils, which are to be kept free of contaminants of all kinds for a later joining of the sheet metal foils to a casing tube.
Es ist daher die Aufgabe der vorliegenden Erfindung, ein verbessertes Verfahren zum Verarbeiten zumindest teilweise strukturierter, schon mit Washcoat beschichteter Blechfolien zu einer Trägermatrix eines Wabenkörpers, insbesondere Katalysatorträgerkörper, anzugeben, mit dem sich das Entstehen und unerwünschte Ablagerungen von Wash-Coat-Staub insbesondere auf die späteren Verbindungsstellen der Trägermatrix mit dem Wabenkörper vermeiden lassen.It is therefore the object of the present invention to provide an improved method for processing at least partially structured sheet films already coated with a washcoat to form a support matrix of a honeycomb body, in particular a catalyst support body, with which the formation and undesired deposits of washcoat dust are particularly affected have the later connection points of the carrier matrix with the honeycomb body avoided.
Erfindungsgemäß wird diese Zielsetzung durch ein Verfahren mit den Merkmalen des Anspruchs 1 erreicht. Vorteilhafte Weiterbildungen und Ausgestaltungen, die einzeln oder in Kombination miteinander eingesetzt werden können, sind Gegenstand der abhängigen Ansprüche.According to the invention, this objective is achieved by a method with the features of claim 1. Advantageous further developments and refinements, which can be used individually or in combination with one another, are the subject of the dependent claims.
Der Erfindung liegt der Gedanke zugrunde, die mit Wash-Coat beschichteten Blechfolien wenigstens einseitig, vorzugsweise beidseitig, vor ihrer Schichtung, Wicklung und/oder Faltung zu der Trägermatrix des Wabenkörpers und/oder vor und/oder nach ihrer Positionierung als Trägermatrix in dem Mantel mit einem Fixiermittel zu behandeln.The invention is based on the idea that the sheet-metal foils coated with wash coat, at least on one side, preferably on both sides, with their layering, winding and / or folding to form the carrier matrix of the honeycomb body and / or before and / or after their positioning as a carrier matrix in the jacket to treat a fixative.
Dadurch werden unter Beibehaltung der Vorteile im Zusammenhang mit der Beschichtung der Blechfolien mit Wash-Coat vor ihrer Verarbeitung zu einer Trägermatrix in vorteilhafter Weise ein Lösen von Wash-Coat-Partikeln vermindert und schädliche Ablagerungen vermieden, insbesondere auf für eine spätere An- bindung der Blechfolien insbesondere an einem Mantel vorgesehenen Stellen.As a result, while retaining the advantages associated with coating the sheet metal foils with wash coat before they are processed into a carrier matrix, detachment of wash coat particles is advantageously reduced and harmful deposits are avoided, in particular for later attachment of the sheet metal foils provided in particular on a coat.
Als vorteilhaft hat sich ein Fixiermittel herausgestellt, welches Polymere enthält, die ionische oder, beispielsweise in wässriger Lösung, ionisierbare, insbesondere neutralisierbare, Gruppen wie Polyvenylpyrroldon aufweisen. Alternativ oder kumulativ kann das Fixiermittel auch Polymeresate ätylenisch ungesättigter Säuren wie Acrylsäure, Methacrylsäure oder Crotonsäure enthalten.A fixing agent has been found to be advantageous which contains polymers which have ionic or, for example in aqueous solution, ionizable, in particular neutralizable, groups such as polyvenylpyrrone. Alternatively or cumulatively, the fixing agent can also contain polymerates of ethylenically unsaturated acids such as acrylic acid, methacrylic acid or crotonic acid.
Bevorzugt sind die Polymere und/oder die Polymeresate mit Venylacetat copoly- merisiert.The polymers and / or the polymerates are preferably copolymerized with vinyl acetate.
Weitere Vorteile und Merkmale der Erfindung werden nachfolgend anhand eines lediglich exemplarischen Herstellungsverfahrens eines Wabenkörpers sowie anhand der Zeichnung erläutert.Further advantages and features of the invention are explained below using a merely exemplary manufacturing method of a honeycomb body and using the drawing.
Darin zeigen:In it show:
Fig. 1 eine mit Wash-Coat beschichtete Blechfolie;1 shows a sheet metal film coated with wash coat;
Fig. 2 einen geschichteten Blechfolienstapel zu Beginn des Herstellungsprozesses; und2 shows a layered sheet-metal foil stack at the beginning of the manufacturing process; and
Fig. 3 schematisch einen daraus durch gegensinnige Verschlingung hergestellten Wabenkörper.Fig. 3 shows schematically a honeycomb body made therefrom by intertwining in opposite directions.
Figur 1 zeigt beispielhaft eine beidseitig schon mit Wash-Coat beschichtete glatte Blechfolie 2, deren unbeschichtete Endbereiche 7, 8 später insbesondere mit einem Mantel 6 fügetechnisch verbunden, insbesondere verlötet, verschweißt oder verklebt, werden sollen. Der Wash-Coat wurde mittels einer entsprechenden Vor- richtung auf dem Halbzeug angebracht. Hierbei wurden die Endbereiche 7, 8 entsprechend abgeschirmt, so daß hier die unbeschichteten Bereiche 7, 8 verbleiben. Gemäß einem alternativen Beschichtungsverfahren werden zunächst die Blechfolie 2, 3 insgesamt mit Wash-Coat beschichtet und die Endbereiche 7, 8 nachträglich durch ein chemisches oder mechanisches Verfahren vom Wash-Coat befreit. Dies kann für die Bleche 2, 3 nacheinander erfolgen oder einfacher, wenn die Ble- ehe 2, 3 schon zu einer Trägermatrix 4 weiterverarbeitet wurden, beispielsweise durch einfaches Abbürsten der zu der Trägermatrix 4 weiterverarbeiteten Enden der Blechfolien 2, 3.FIG. 1 shows an example of a sheet metal foil 2 that has already been coated on both sides with a wash coat, the uncoated end regions 7, 8 of which are later to be joined, in particular soldered, welded or glued, in particular with a jacket 6. The wash coat was applied to the semi-finished product using a suitable device. The end regions 7, 8 were shielded accordingly, so that the uncoated regions 7, 8 remain here. According to an alternative coating method, the sheet metal foil 2, 3 as a whole is first coated with wash coat and the end regions 7, 8 are subsequently freed from the wash coat by a chemical or mechanical method. This can be done one after the other for the sheets 2, 3 or more simply if the sheets before 2, 3 have already been processed further to form a carrier matrix 4, for example by simply brushing off the ends of the sheet metal foils 2, 3 which have been further processed to form the carrier matrix 4.
Fig. 2 zeigt einen aus abwechselnden Lagen glatter 2 und strukturierter 3, schon mit Wash-Coat beschichteter Blechfolien geschichteten Stapel 9 mit der Höhe h und der Länge L. Ein solcher Stapel 9 wird mittels einer Gabel (nicht dargestellt) oder einer ähnlich fixierend wirkenden Vorrichtung an den Fixpunkten 1 1, 12 gefaßt und durch Drehen der Gabel bzw. Umbiegen oder Falten der Stapelenden gegensinnig verschlungen.FIG. 2 shows a stack 9 with the height h and the length L, which is composed of alternating layers of smooth 2 and structured 3 sheet metal foils already coated with wash coat. Such a stack 9 is fixed by means of a fork (not shown) or a similar one Device at the fixed points 1 1, 12 and devoured in opposite directions by turning the fork or bending or folding the stack ends.
Auf diese Weise entsteht eine Form, wie sie schematisch in Fig. 3 dargestellt ist. So zu einer Trägermatrix 4 verschlungene Blechfolien 2, 3 lassen sich in einem Mantel 6 fügetechnisch befestigen, wodurch ein elastischer, aber doch stabiler Wabenkörper 1, insbesondere Katalysatorträgerkörper, entsteht. Zur Verbesserung der Stabilität können die einzelnen Blechfolien 2, 3 stirnseitig, vorzugsweise in einem ringförmigen Randzonenbereich 13 untereinander verlötet sein. Auf diese Weise entsteht ein stabiles Gefüge auch dann, wenn einzelne Blechfolien 2, 3 aufgrund von Längenabweichungen den Mantel 6 nicht berühren sollten.In this way, a shape is created as shown schematically in FIG. 3. Sheet metal foils 2, 3, which are intertwined to form a carrier matrix 4, can be fastened in a jacket 6 by joining technology, as a result of which an elastic, but nevertheless stable honeycomb body 1, in particular a catalyst carrier body, is produced. To improve the stability, the individual sheet metal foils 2, 3 can be soldered to one another on the end face, preferably in an annular edge zone region 13. In this way, a stable structure is created even if individual sheet metal foils 2, 3 should not touch the jacket 6 due to length deviations.
Um sicherzustellen, daß die Endbereiche 7, 8 der schon mit Wash-Coat beschichteten Blechfolien 2, 3 frei von bei der zuvor lediglich exemplarisch beschriebenen Herstellung eines Wabenkörpers 1 entstehenden Wash-Coat-Staubs bleiben, werden nach der Erfindung die mit Wash-Coat beschichteten Blechfolien 2, 3 wenig- stens einseitig, vorzugsweise beidseitig, vor ihrer Schichtung, Wicklung und/oder Faltung zu der Trägermatrix 4 des Wabenkörpers 1 und/oder vor und/oder nach ihrer Positionierung als Trägermatrix 4 in dem Mantel 6 mit einem Fixiermittel behandelt. Das erfindungsgemäße Verfahren fördert somit in vorteilhafter Weise eine dauerhafte Anbindung einer Trägermatrix 4 an einem Mantel 6 durch Vermeidung schädlicher Ablagerungen insbesondere von bei der Herstellung entstehenden Wash-Coat-Partikeln. In order to ensure that the end regions 7, 8 of the sheet-metal foils 2, 3 already coated with wash-coat remain free of wash-coat dust which arises in the production of a honeycomb body 1, which was previously only described by way of example, the wash-coat is coated according to the invention Sheet metal foils 2, 3 are treated at least on one side, preferably on both sides, with a fixing agent before their layering, winding and / or folding to form the carrier matrix 4 of the honeycomb body 1 and / or before and / or after their positioning as a carrier matrix 4 in the jacket 6. The method according to the invention thus advantageously promotes a permanent connection of a carrier matrix 4 to a jacket 6 by avoiding harmful deposits, in particular wash coat particles formed during production.
BezugszeichenlisteLIST OF REFERENCE NUMBERS
Wabenkörper glatte Blechfolie strukturierte BlechfolieHoneycomb body smooth sheet metal structured sheet metal
Trägermatrixsupport matrix
Kanälechannels
Mantelcoat
Endbereich der BlechfolienEnd area of the metal foils
Endbereich der BlechfolienEnd area of the metal foils
Stapel aus Blechfolien 2, 3Stack of sheet metal foils 2, 3
Seitenfläche des Stapels 9Side surface of the stack 9
Fixpunktfixed point
Fixpunktfixed point
Randzonenbereich Fringe area

Claims

Patentansprüche claims
1. Verfahren zur Herstellung eines Wabenkörpers (1 ), insbesondere Katalysatorträgerkörper, mit einer aus zumindest teilweise strukturierten Blech- folien (2, 3) geschichteten und/oder gewickelten bzw. gefalteten Trägermatrix (4) mit einer Vielzahl für ein Fluid durchströmbarer Kanäle (5), wobei die Blechfolien (2, 3) Endbereiche (7, 8) aufweisen, die an einem Mantel (6) fugetechnisch und/oder formschlüssig angebunden sind, bei dem - zunächst eine geeignete Anzahl zumindest teilweise strukturierter, insgesamt oder bis auf die Endbereiche (7, 8) schon mit Wash-Coat beschichteter Blechfolien (2, 3) zu der Trägermatrix (4) des Wabenkörpers (1 ) geschichtet und/oder gewickelt bzw. gefaltet werden; und zu einem späteren Zeitpunkt die Trägermatrix (4) im Mantel (6) positioniert und an diesem angebunden wird; dadurch gekennzeichnet, daß die mit Wash-Coat beschichteten Blechfolien (2, 3) wenigstens einseitig, vorzugsweise beidseitig, vor ihrer Schichtung, Wicklung und/oder Faltung zu der Trägermatrix (4) des Wabenkörpers (1 ) und/oder vor und/oder nach ihrer Positionierung als Trägermatrix (4) in dem Mantel (6) mit einem Fixiermittel behandelt werden.1. Method for producing a honeycomb body (1), in particular catalyst carrier body, with a carrier matrix (4) layered and / or wound or folded from at least partially structured sheet metal foils (2, 3) with a plurality of channels (5) through which a fluid can flow ), the sheet-metal foils (2, 3) having end regions (7, 8) which are connected to a jacket (6) in terms of joints and / or in a form-fitting manner, in which - initially a suitable number, at least partially structured, in total or to the end regions (7, 8) sheet films (2, 3) already coated with wash coat are layered and / or wound or folded to form the carrier matrix (4) of the honeycomb body (1); and at a later time the carrier matrix (4) is positioned in the jacket (6) and connected to it; characterized in that the sheet-metal foils (2, 3) coated with wash coat, at least on one side, preferably on both sides, before their layering, winding and / or folding to form the carrier matrix (4) of the honeycomb body (1) and / or before and / or after their positioning as a carrier matrix (4) in the jacket (6) are treated with a fixing agent.
2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Fixiermittel Polymere enthält, die ionische oder, beispielsweise in wässriger Lösung, ionisierbare, insbesondere neutralisierbare, Gruppen wie Polyvenylpyrrol- don aufweisen. 2. The method according to claim 1, characterized in that the fixing agent contains polymers which have ionic or, for example in aqueous solution, ionizable, in particular neutralizable, groups such as polyvenylpyrrole- don.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Fixiermittel Polymeresate ätylenisch ungesättigter Säuren wie Acrylsäure, Methacrylsäure oder Crotonsäure enthält.3. The method according to claim 1 or 2, characterized in that the fixing agent contains polymerates of ethylenically unsaturated acids such as acrylic acid, methacrylic acid or crotonic acid.
4. Verfahren nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß die Polymere und/oder die Polymeresate mit Venylacetat copolymerisiert sind. 4. The method according to claim 2 or 3, characterized in that the polymers and / or the polymerates are copolymerized with vinyl acetate.
PCT/EP2000/013102 2000-01-04 2000-12-21 Method for producing a honeycomb, using metal sheets which have already been coated with wash-primer WO2001049411A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23677/01A AU2367701A (en) 2000-01-04 2000-12-21 Method for producing a honeycomb, using metal sheets which have already been coated with wash-primer

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10000108A DE10000108A1 (en) 2000-01-04 2000-01-04 Process for the production of a honeycomb body using sheet metal foils already coated with wash coat
DE10000108.4 2000-01-04

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DE (1) DE10000108A1 (en)
WO (1) WO2001049411A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009018422A1 (en) * 2009-04-22 2010-11-04 Emitec Gesellschaft Für Emissionstechnologie Mbh Process for producing a coated honeycomb body

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0591689A1 (en) * 1992-10-05 1994-04-13 Degussa Aktiengesellschaft Metallic carrier for catalyst with a matrix of metal strips coated with catalyst, said matrix being welded within a tubular casing
EP0617650A1 (en) * 1991-12-21 1994-10-05 Emitec Emissionstechnologie Method of soldering catalyst supports in catalytic converters.
US5366700A (en) * 1991-04-16 1994-11-22 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Apparatus for catalytically decontaminating exhaust gases and method for producing the apparatus
DE19825018A1 (en) * 1998-06-04 1999-12-09 Emitec Emissionstechnologie Method and laminated core for producing a honeycomb body with a plurality of channels that are permeable to a fluid

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5366700A (en) * 1991-04-16 1994-11-22 Emitec Gesellschaft Fuer Emissionstechnologie Mbh Apparatus for catalytically decontaminating exhaust gases and method for producing the apparatus
EP0617650A1 (en) * 1991-12-21 1994-10-05 Emitec Emissionstechnologie Method of soldering catalyst supports in catalytic converters.
EP0591689A1 (en) * 1992-10-05 1994-04-13 Degussa Aktiengesellschaft Metallic carrier for catalyst with a matrix of metal strips coated with catalyst, said matrix being welded within a tubular casing
DE19825018A1 (en) * 1998-06-04 1999-12-09 Emitec Emissionstechnologie Method and laminated core for producing a honeycomb body with a plurality of channels that are permeable to a fluid

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DE10000108A1 (en) 2001-07-05
AU2367701A (en) 2001-07-16

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