Abstract: The present invention relates to a catalyst comprising a support substrate having a length L extending between the ends a and b, and four material zones A, B, C and D, wherein material zone B comprises bismuth.

Abstract: 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.

Abstract: Subject of the invention is an exhaust gas purification system for a gasoline engine, comprising in consecutive order the following devices: a first three-way-catalyst (TWC1), a gasoline particulate filter (GPF) and a second three-way-catalyst (TWC2), wherein the platinum-group metal concentration (PGM) of the TWC2 is greater than the PGM of the GPF, wherein the PGM is determined in g/ft3 of the volume of the device. The invention also relates to methods in which the system is used and uses of the system.

Abstract: The present invention relates to a diesel oxidation catalyst comprising a carrier body having a length L extending between a first end face and a second end face, and differently composed material zones A and B arranged on the carrier body, wherein material zone A comprises platinum, palladium, rhodium or a mixture of any two or more thereof applied to a cerium-zirconium mixed oxide, and material zone B comprises platinum, palladium or platinum and palladium applied to a carrier oxide B.

Abstract: This invention relates generally to olefin metathesis catalyst compounds, to the preparation of such compounds, compositions comprising such compounds, methods of using such compounds, articles of manufacture comprising such compounds, and the use of such compounds in the metathesis of olefins and olefin compounds. The invention has utility in the fields of catalysts, organic synthesis, polymer chemistry, and industrial and fine chemicals industry.

Abstract: 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.

Abstract: The present invention pertains to a catalyst for use in the selective catalytic reduction (SCR) of nitrogen oxides comprising a monolithic substrate and a coating A, which comprises an oxidic metal carrier comprising an oxide of titanium and a catalytic metal oxide which comprises an oxide of vanadium wherein the mass ratio vanadium/titanium is 0.07 to 0.26.

Abstract: The present invention relates to the use of a material B containing palladium and platinum in a weight ratio of 2:3 to 10:1 for increasing the low-temperature storage of nitrogen oxides by means of a material A containing palladium and zeolite, wherein material A and material B are present on a carrier substrate of the length L, and wherein material A and material B are different from one another.

Abstract: The invention concerns a process for preparing an essentially silicon (Si) free compounds of the general formula [M(O)(OR)y], wherein M = Mo, y = 3 or M = W, y = 3 or 4. Furthermore, it is directed towards compounds obtained by the aforementioned process and towards the use of such an obtained compound. Another objective of the herein described invention are essentially silicon free compounds of the general formula MOXy or [MOXy(solv)p], prepared using the aforementioned process, wherein M = Mo, y = 3 or M = W, y = 3 or 4, X = Cl or Br, solv = an oxidizing agent Z binding or coordinating to M via at least one donor atom, p = 1 or 2.

Abstract: The present invention relates to a particulate filter which comprises a wall-flow filter of length L and two different catalytically active coatings Y and Z, wherein the wall flow filter comprises channels E and A that extend in parallel between a first and a second end of the wall-flow filter and are separated by porous walls which form the surfaces OE and OA, respectively, and wherein the channels E are closed at the second end and the channels A are closed at the first end. The invention is characterized in that the coating Y is located in the channels E on the surfaces OE and the coating Z is located in the porous walls.

Abstract: Subject of the invention is an exhaust gas purification system for a gasoline engine, comprising in consecutive order the following devices: ? a first three-way-catalyst (TWC1), a gasoline particulate filter (GPF) and a second three-way-catalyst (TWC2), ? wherein the platinum-group metal concentration (PGM) of the TWC2 is greater than the PGM of the GPF, wherein the PGM is determined in g/ft3 of the volume of the device. Also disclosed are methods in which the system is used and uses of the system.

Abstract: The invention relates to a wire made of platinum group metals for producing grid catalysts comprising platinum and rhodium. The invention is characterized in that the wire is made as a sheathed wire and consists of a core and one or more sheaths arranged one over the other outwards from the core in a radially symmetrical manner, and the rhodium concentration in the outermost sheath is lower than the rhodium concentration in the sheath or core arranged directly under the outermost sheath.

Abstract: The present invention relates to a particulate filter which comprises a wall flow filter of length L and two different catalytically active coatings Y and Z, wherein the wall flow filter comprises channels E and A that extend in parallel between a first and a second end of the wall flow filter and are separated by porous walls which form the surfaces OE and OA, respectively, and wherein the channels E are closed at the second end and the channels A are closed at the first end. The invention is characterized in that the coating Y is located in the channels E on the surfaces OE and the coating Z is located in the channels A on the surfaces OA.

Abstract: The invention relates to a method for producing aqueous preparations of complexes of platinum group metals (PGM) Pt, Pd, Rh and Ir having the general formula [MA/MB/MC (L)a (H2O)b (O2?)c(OH?)d](OH—)e(H+)f, wherein MA=PtII or PdII, MB=PtIV, MC=Rh or Ir, L is a neutral monodentate or bidentate donor ligand, and a is an integer between 1 and 4 (or 2) and/or between 1 and 6 (or 3), b is an integer between 0 and 3 (or 5), c is an integer between 0 and 3 (or 4), d is an integer between 0 and 3 (or 5), e is an integer between 0 and 2 (or 3 or 4) and f is an integer between 0 and 4 (or 5). In the method according to the invention, the hydroxo complexes H2Pd(OH)4 (in the case of MA=PdII), H2Pt(OH)6 (in the case of MA=PtII and MB=PtIV) or H3MC(OH)6 (for MC=RhIII IrIII) are converted in the presence of the donor ligands, wherein at least one hydroxo group of the hydro complex is exchanged. Preferably, the reaction occurs at temperatures in the range of 40 to 110° C.

Abstract: The invention relates to a one-pot method for preparing oxido (tetraalkoxido) tungsten compounds according to the general formula [W(O)(OR)4] (I), originating from WCl6, hexamethyldisiloxane, an alcohol ROH and an amine or NH3 gas. The invention further relates to the use of a compounds [W(O)(OR)4] (I) and to a substrate which has on one surface a tungsten layer or a layer containing tungsten which are suitable for producing photovoltaic elements, semiconductor elements or car exhaust catalytic converters. The method permits the preparation of defined products in a simple, cost-effective and reproducible manner in high purity and good to very good yields.

Abstract: 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.

Abstract: The present invention relates to a method for the preparation of a molecular sieve of the CHA-type as well as catalytic applications thereof.

Abstract: The present invention relates to a catalyst, which comprises * a carrier substrate with a first end a and a second end b, and length L, * a material zone A containing a platinum group metal on a support material with a load of 40 to 150 g/l, relative to the volume of the carrier substrate and * material zone B containing a platinum group metal on a support material with a load of 75 to 200 g/l, relative to the volume of the carrier substrate, wherein material zone B has a greater content of platinum group metal, relative to the volume of the carrier substrate and calculated in g/l, than material zone A, and wherein material zone B has a proportion of pores with a diameter of 0.5 to 50 µm of 20 to 30%.

Abstract: An exhaust gas purification system for a gasoline engine is described the system comprising in consecutive order the following devices: •a first three-way-catalyst (TWC1), a gasoline particulate filter (GPF) and a second three-way-catalyst (TWC2), •wherein the oxygen storage capacity (OSC) of the GPF is greater than the OSC of the TWC1, wherein the OSC is determined in mg/l of the volume of the device.

Abstract: The present invention relates to a three-way catalyst (TWC) for treatment of exhaust gases from internal combustion engines operated with a predominantly stoichiometric air/fuel ratio, so called spark ignited engines.