DE10258693B4 - Process for coating one or both sides of flat filter material with a dispersion of catalytically active components and a suitable solvent - Google Patents
Process for coating one or both sides of flat filter material with a dispersion of catalytically active components and a suitable solvent Download PDFInfo
- Publication number
- DE10258693B4 DE10258693B4 DE10258693A DE10258693A DE10258693B4 DE 10258693 B4 DE10258693 B4 DE 10258693B4 DE 10258693 A DE10258693 A DE 10258693A DE 10258693 A DE10258693 A DE 10258693A DE 10258693 B4 DE10258693 B4 DE 10258693B4
- Authority
- DE
- Germany
- Prior art keywords
- dispersion
- spraying
- filter
- suitable solvent
- catalytically active
- 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.)
- Expired - Fee Related
Links
- 239000006185 dispersion Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000000576 coating method Methods 0.000 title claims abstract description 10
- 239000011248 coating agent Substances 0.000 title claims abstract description 9
- 239000000463 material Substances 0.000 title claims abstract description 5
- 239000002904 solvent Substances 0.000 title claims abstract description 5
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 230000035515 penetration Effects 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims abstract description 3
- 238000002485 combustion reaction Methods 0.000 claims abstract 2
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000010924 continuous production Methods 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0217—Pretreatment of the substrate before coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2027—Metallic 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
- 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
- B01J35/58—Fabrics or filaments
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Catalysts (AREA)
- Filtering Materials (AREA)
Abstract
Verfahren zum ein- oder beidseitigen Beschichten von flächigem Filtermaterial mit einer Dispersion aus katalytisch aktiven Komponenten und einem geeigneten Lösungsmittel, dadurch gekennzeichnet, dass auf die Filterfolien zur Herstellung von Partikelfiltern für die Reinigung der Abgase von Brennkraftmaschinen die Dispersion aufgesprüht wird, wobei während einer einseitigen Besprühung von der Gegenseite der Filterfolie her ein Luftgegendruck aufrechterhalten wird zur Einstellung der Eindringtiefe der Dispersion.method for one or both sides coating of flat filter material with a Dispersion of catalytically active components and a suitable Solvent, characterized in that on the filter films for the production of particulate filters for the cleaning of the exhaust gases of internal combustion engines the dispersion sprayed being while being a one-sided spraying maintain an air back pressure from the opposite side of the filter film ago is used to adjust the penetration depth of the dispersion.
Description
Filterfolien zur Herstellung von Partikelfiltern für z.B. Brennstoffmaschinen, insbesondere für Dieselmotoren, können aus permeablen Drahtgeweben mit gesinterter Metallpulverbeschichtung, aus Streckmetallen mit Metallpulverbeschichtung oder aus Metallfaservliesen, die teilweise ebenfalls mit Metallpulver gesintert sind, bestehen. Aus diesen Folien können beispielsweise monolithische, scheiben- oder zylinderförmige Trägerkörper hergestellt werden, die anschließend an ihrer Oberfläche mit Dispersionen aus katalytisch aktiven Komponenten und einem geeigneten Lösungsmittel beschichtet werden.filters for the production of particulate filters for e.g. Fuel machines especially for Diesel engines, can of permeable wire mesh with sintered metal powder coating, expanded metals with metal powder coating or metal fiber nonwovens, which are also partially sintered with metal powder exist. From these slides can For example, monolithic, disc or cylindrical carrier body produced that will be subsequently on their surface with dispersions of catalytically active components and a suitable solvent be coated.
Bekannt
ist es aus der
Aus
der
Die Aufgabe der Erfindung besteht darin, die Beschichtung von Filterfolien für Katalysatoren zu verbessern und zu modifizieren.The The object of the invention is the coating of filter films for catalysts to improve and modify.
Gelöst wird die Erfindungsaufgabe durch ein Verfahren mit den Merkmalen des Anspruchs 1, bei dem die Filterfolien in Mattenform durch Aufsprühen der geeigneten Dispersionen (Washcoat) beschichtet werden, wobei während der einseitigen Besprühung von der Gegenseite der Folie her ein Luftgegendruck aufrechterhalten wird, um die Eindringtiefe der Dispersion und ggf. auch deren Schichtdicke besser einstellen zu können. Dabei kann die Aufsprühung ein- oder beidseitig und auch in mehreren Durchgängen erfolgen. Es besteht damit die Möglichkeit, diese Filterfolien von beiden Seiten jeweils mit einer unterschiedlichen Dispersion auch in unterschiedlicher Beschichtungsdicke zu behandeln.Is solved the invention task by a method with the features of Claim 1, wherein the filter sheets in mat form by spraying the suitable dispersions (washcoat) are coated, wherein during the one-sided spraying of the opposite side of the film maintained an air back pressure is the penetration depth of the dispersion and possibly also their layer thickness to adjust better. This can be the spray take one or both sides and also in several passes. It exists with it the possibility, These filter sheets from both sides each with a different Dispersion to treat in different coating thickness.
Von besonderem Vorteil ist der erfindungsgemäße Vorschlag gemäß Anspruch 4, nachdem die aufzusprühende Dispersion nanoskalierte Keramikteilchen enthält. Mit derartig kleinen Keramikteilchen kann auch die Beschichtung der Poreninnenraums des Filtermaterials erreicht werden, so dass eine größere katalytisch wirksame Oberfläche erzielt wird.From particular advantage of the proposal according to the invention according to claim 4, after the sprayed Dispersion contains nanoscale ceramic particles. With such small ceramic particles can also reaches the coating of the pore interior of the filter material be, so a larger catalytic effective surface is achieved.
Das Aufsprühverfahren erfolgt vorzugsweise gemäß Anspruch 3 im Durchlaufverfahren der mattenförmigen Filtervorrichtungen unter entsprechenden Sprühdüsen, die ein- oder beidseitig die Dispersionen auftragen.The spray up is preferably carried out according to claim 3 in the continuous process of the mat-shaped filter devices under appropriate spray nozzles, the apply one or both sides of the dispersions.
In einem weiteren Aufsprühvorgang kann zusätzlich noch ein aus Metall oder Metalloxid bestehender Katalysator aufgebracht werden.In another spraying process can additionally a catalyst consisting of metal or metal oxide is applied become.
Es ist zweckmäßig, mit Sintermetallen beschichtetes flächiges Filtermaterial vor der Aufsprühung mit einer Dispersion einem Verfahren zur Erhöhung der Oberflächenrauhigkeit gemäß Anspruch 6 zu unterziehen, beispielsweise kann die Erhöhung der Oberflächenrauhigkeit gemäß Anspruch 7 durch Anätzen erfolgen. Dies dient der besseren Anhaftung der Dispersion.It is appropriate, with Sintered metals coated flat Filter material before spraying with a dispersion, a method of increasing the surface roughness according to claim For example, increasing the surface roughness can be done according to claim 7 by etching respectively. This serves to better adhesion of the dispersion.
Es besteht auch die Möglichkeit, einen Binder oder Kleber in einem vorhergehenden separaten Durchgang aufzusprühen.It there is also the possibility a binder or glue in a previous separate passage spray.
Die aufgebrachte katalytische Sprühbeschichtung kann die Funktionen Rußzündsenkung, Oxidation von HC und CO, NO2-Erzeugung, SCR und NOx Speicherung erfüllen.The applied catalytic spray coating can perform the functions of soot reduction, oxidation of HC and CO, NO 2 production, SCR and NO x storage.
Die Aufbringung von unterschiedlichen Beschichtungen auf Vorder- und Rückseite einer Filterfolie kann für verschiedene Aufgaben der Abgasnachbehandlung von Vorteil sein.The Application of different coatings on front and back back a filter film can for Various tasks of the exhaust aftertreatment be an advantage.
Von besonderer Bedeutung ist das erfindungsgemäße Verfahren für die Herstellung von Partikelfiltern für die Reinigung der Abgase von Dieselmotoren.From Of particular importance is the process of the invention for the preparation of particulate filters for the cleaning of exhaust gases from diesel engines.
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10258693A DE10258693B4 (en) | 2002-12-16 | 2002-12-16 | Process for coating one or both sides of flat filter material with a dispersion of catalytically active components and a suitable solvent |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10258693A DE10258693B4 (en) | 2002-12-16 | 2002-12-16 | Process for coating one or both sides of flat filter material with a dispersion of catalytically active components and a suitable solvent |
Publications (2)
Publication Number | Publication Date |
---|---|
DE10258693A1 DE10258693A1 (en) | 2004-07-08 |
DE10258693B4 true DE10258693B4 (en) | 2006-06-01 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE10258693A Expired - Fee Related DE10258693B4 (en) | 2002-12-16 | 2002-12-16 | Process for coating one or both sides of flat filter material with a dispersion of catalytically active components and a suitable solvent |
Country Status (1)
Country | Link |
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DE (1) | DE10258693B4 (en) |
Families Citing this family (1)
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 (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19547597A1 (en) * | 1995-12-20 | 1997-07-17 | Degussa | Monolithic catalyst for post treating IC engine exhaust gas |
DE10115328A1 (en) * | 2001-03-28 | 2002-10-10 | Framatome Anp Gmbh | Method for ultrasonic measurement of partial layer thicknesses of thin-walled pipes |
-
2002
- 2002-12-16 DE DE10258693A patent/DE10258693B4/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19547597A1 (en) * | 1995-12-20 | 1997-07-17 | Degussa | Monolithic catalyst for post treating IC engine exhaust gas |
DE10115328A1 (en) * | 2001-03-28 | 2002-10-10 | Framatome Anp Gmbh | Method for ultrasonic measurement of partial layer thicknesses of thin-walled pipes |
Also Published As
Publication number | Publication date |
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DE10258693A1 (en) | 2004-07-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: HJS EMISSION TECHNOLOGY GMBH & CO. KG, 58706 M, DE |
|
R081 | Change of applicant/patentee |
Owner name: HJS EMISSION TECHNOLOGY GMBH & CO. KG, DE Free format text: FORMER OWNER: HJS FAHRZEUGTECHNIK GMBH & CO., 58706 MENDEN, DE Effective date: 20110201 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |