Umicore Ag & Co Kg

Degussa - Huls Ag

Degussa Aktiengesellschaft

Martin Foerster

Naina Deibel

Antje Oltersdorf

Juergen Koch

Manuel Gensch

Jan Schoenhaber

Benjamin Barth

Rainer Domesle

Martin Roesch

Wolfgang Hasselmann

Ralph Kiessling

Stephanie Spiess

Ulrich G&ouml;bel

Gerhard Birtigh

Claas-Jurgen Klasen

Andreas Gutsch

Bernd Mergner

Lutz Marc Ruwisch

Herbert Riemenschneider

Meike Antonia Gotthardt

Josef Piroth

Ewald Dittrich

Andreas Hofler

Astrid Mueller

Klaus-Peter Bauer

Rainer Gilg

Sascha Zoelle

Jürgen Koch

Ulrich Schlachter

Oliver Franta

Willi Krampe

Carsten Herzog

Yannic Weigl

Morten Schonert

Oliver St&ouml;hr

Walter Leibold

Michael Hoffmann

Robert Schafer

Wolfgang Hasselman

The invention relates to a wall-flow filter, to a method for the production and the use of the filter for reducing harmful exhaust gases of an internal combustion engine. The wall-flow filter was produced by exposing the filter at least twice successively to a powder-gas aerosol.

Particle filter with a plurality of coatings

The present invention relates to a method for producing a coated wall-flow filter. The wall-flow filter is coated with a powder aerosol.

Method for coating a wall-flow filter

The invention relates to a wall-flow filter as a particle filter with catalytically active coatings in the channels which are closed in a gas-tight manner at the opposing closed ends of the channels A at the first end, wherein the inlet region of the filter is additionally supplied with a dry powder-gas aerosol which contains metal compounds with a high melting point (such as the metal oxides Al2O3, SiO2, FeO2, TiO2, ZnO2, etc. for example) and which is to simultaneously improve the catalytic activity and the degree of filtration efficiency with respect to the exhaust gas back-pressure.

Catalytically active particle filter with a high degree of filtration efficiency

The invention relates to a method for producing a wall-flow filter for removing fine particulate solids from gases, and to the use thereof for cleaning exhaust gases of an internal combustion engine. The invention also relates to a correspondingly produced exhaust-gas filter having a high filtration efficiency.

High-filtration efficiency wall-flow filter

The present invention relates to a wall flow filter, to a method for the production and the use of the filter for reducing harmful exhaust gases of an internal combustion engine. Particle filters are commonly used for filtering exhaust gases from a combustion process. Also disclosed are novel filter substrates and their specific use in exhaust gas aftertreatment.

Method for producing catalytically active wall flow filters

The present invention relates to a wall-flow filter, to a method for the production and the use thereof in order to reduce harmful exhaust gases of an internal combustion engine. The wall-flow filter was produced by applying a powder-gas aerosol to the filter, whereby the powder was deposited in the pores of the wall-flow filter.

Coated wall-flow filter

The present invention relates to a method for producing automobile exhaust gas catalytic converters, to the catalytic converters as such and to the use thereof. In particular, the method comprises a step which results in a smaller particle size of the catalytically active material used.

Ultrasound-assisted method for producing an SCR catalytic converter

The present invention relates to a catalytically coated wall-flow filter, to a method for the production thereof and to the use thereof in order to reduce harmful exhaust gases of an internal combustion engine.

The present invention relates to a method for producing automobile exhaust gas catalytic converters, to the catalytic converters as such and to the use thereof. In particular, the method comprises a step which results, independently of the actual drying process, in the catalytically active material used being dried. The invention is especially used in the coating of wall-flow filters.

Method for producing an SCR catalytic converter by way of pre-drying

A process for coating the flow channels in a monolithic, cylindrically shaped catalyst carrier with a coating dispersion, wherein the carrier has two end faces which are connected to each other by flow channels arranged parallel to the axis of the cylinder, by vertically aligning the axis of the cylindrical carrier, placing a predetermined amount of coating dispersion from a storage container on the upper end face of the carrier and drawing the dispersion through the flow channels under suction, removing excess coating dispersion from the flow channels by emptying the flow channels under suction, returning the excess dispersion to the storage container and fixing the dispersion coating by calcination. The coating dispersion is drawn through the flow channels under suction at a rate of flow of 0.1 to 1 m/s and after completion of passage under suction the excess coating dispersion is removed from the flow channels by applying a suction impulse from below, wherein the suction air is drawn through the flow channels under suction at a rate of flow between 40 and 1 m/s and the excess coating dispersion discharged with the air stream is separated from the air stream within a time of less than 100 ms after discharge from the catalyst carrier.

Process for coating the flow channels in a monolithic catalyst carrier with a coating dispersion

A method for producing a nitrogen oxide storage material that contains at least one storage component in the form of particles of an oxide, carbonate or hydroxide of the elements magnesium, strontium, barium, lanthanum and cerium on a carrier material from the group consisting of doped cerium oxide, cerium/zirconium mixed oxide and aluminum oxide or mixtures of these. The method is carried out by suspending the support material in an aqueous solution of precursors of the storage components, this suspension is then introduced into a hot gas stream, the temperature of which is calculated so that, during a residence time of the suspension in the hot gas stream of less than one minute, the solvent of the suspension is evaporated out and the precursors of the storage components are thermally broken down and converted to the storage components before the storage material that forms in this way is separated from the stream of hot gases.

Method for producing a nitrogen oxide storage material and a storage material made with it

A suspension, dispersion or emulsion is introduced into a burner. A two-stage after-treatment is then carried out. The resulting powder can be employed as a catalyst.

Process for the preparation of pulverulent heterogeneous substances

A process for the coating of the flow channels of a cylindrical, honeycomb form catalyst carrier with a dispersion coating through filling of the vertically oriented flow channels with a fill quantity of the coating dispersion through the bottom face of the catalyst carrier and subsequent downward emptying and clearance extraction of the flow channels, as well as drying and calcination of the catalyst carrier, by the following steps:

Process for the coating of the flow channels of a honeycomb form

A method for the production of spherical granulated materials from powdered solids and the granulated materials produced by it are disclosed. The method is characterized in that the powdered solids are moistened, possibly together with the usual binders, flow agents and plasticizers for the compression of solids, by the addition of a corresponding quantity of liquid and mixing smoothly in a mixer; they are then compressed with a ring collar mill into cylindrical agglomerate and then rounded in a rounding unit with wrinkle washer. The granulated solids thus produced have a very narrow particle size distribution and are distinguished by good flowability and good dispersability, depending on process controls.

Growing community of inventors

Büdingen, Germany

Martin Foerster