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Thomas Fetzer, Bernd Morsbach, Martin Hartweg, Ralf Dirc Roitzheim, Andrea Seibold, Leonhard Walz: Process for reducing NO.sub.x from exhaust fumes. BASF Aktiengesellschaft, Keil & Weinkauf, November 28, 2000: US06153161 (10 worldwide citation)

NO.sub.x, where x is 1 and 2, in exhaust gases is reduced over heterogeneous catalysts with hydrocarbons, carbon monoxide, hydrogen or mixtures thereof in the presence of oxygen from 100 to 650.degree. C. and an absolute pressure of from 0.5 to 50 bar by a process in which the heterogeneous catalyst ...


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Martin Hartweg, Andrea Seibold, Leonhard Walz, Thomas Fetzer, Bernd Morsbach: Catalyst and a method for its production and use of same. Daimler Benz Aktiengesellschaft, BASF Aktiengesellschaft, Evenson McKeown Edwards & Lenahan P L L C, October 12, 1999: US05965099 (10 worldwide citation)

A catalyst and a method for producing the catalyst, for catalytic reduction of NO.sub.x and oxidation of hydrocarbons, the catalyst comprises a zinc, copper and aluminum spinel to which, at least one element selected from palladium, platinum, rhodium, ruthenium, osmium, iridium, rhenium and/or rare ...


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Martin Hartweg, Martina Heinau, Andrea Seibold, Leonhard Walz: Zeolite-spinel catalyst for the reduction of nitrogen oxides and the process thereof. Daimler Benz, Evenson McKeown Edwards & Lenahan P L L C, December 3, 1996: US05580534 (8 worldwide citation)

The invention provides a catalyst, and a process for preparing the same, for the catalytic reduction of NO.sub.x and for the oxidation of hydrocarbons. The catalyst contains a copper oxide-zinc oxide-aluminum oxide spinel and a zeolitic support material.


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Martin Hartweg, Martina Heinau, Andrea Seibold, Leonhard Walz, Thomas Fetzer, Bernd Morsbach, Wolfgang Buechele: Catalyst and process for its production. Daimler Benz, BASF Aktiengesellschaft, Evenson McKeown Edwards & Lenahan PLLC, May 12, 1998: US05750460 (6 worldwide citation)

A catalyst and a process for producing the catalyst are provided. For the catalytic reduction of NO.sub.x and for the oxidation of hydrocarbons, the catalyst contains a spinel containing the metals copper, zinc and aluminum.


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Bernd Krutzsch, Andrea Seibold, Leonhard Walz, Walter Boegner, Martina Heinau, Martin Hartweg, Brigitte Konrad: Process for absorbing and desorbing nitrogen oxides in exhaust gases. Daimler Benz, Evenson McKeown Edwards & Lenahan P L L C, December 22, 1998: US05851501 (4 worldwide citation)

A material and a process for adsorbing and desorbing nitrogen oxides in exhaust gas systems of engines running on a lean mixture, which does not require a prior oxidation step, wherein a mixed oxide which has an oxygen-rich orthorhombic structure is used which changes to an oxygen-poor tetragonal st ...


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Martin Hartweg, Rolf Dirc Roitzheim, Andrea Seibold, Leonhard Walz, Thomas Fetzer, Bernd Morsbach: Method for operating a purification device, a purification device and use of the same. Daimler Benz, Evenson McKeown Edwards & Lenahan P L L C, December 21, 1999: US06004520 (3 worldwide citation)

The present invention relates to a method for operating a purification device, to a purification device and to the use of same. To reduce the emission of pollutants, a filter body through which a fluid can flow and comprising a catalyst, is exposed to a stream of gas which is to be purified. Before ...


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Martin Hartweg, Andrea Seibold, Leonhard Walz, Thomas Fetzer, Bernd Morsbach: Catalyst and a method for its production and use of same. Daimler Benz Aktiengesellschaft, Evenson McKeown Edwards & Lenahan P L L C, May 18, 1999: US05905056 (3 worldwide citation)

A catalyst and a method for producing the catalyst, for catalytic reduction of NO.sub.x and oxidation of hydrocarbons, the catalyst comprises a zinc, copper and aluminum spinel to which, at least one element selected from palladium, platinum, rhodium, ruthenium, osmium, iridium, rhenium and/or rare ...


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Hans Georg von Schnering, Winfried Becker, Martin Schwarz, Leonhard Walz, Elfi Waldschmidt, Joachim Adam: Superconductors Bi-Sr-Cu-O. Hoechst Aktiengesellschaft, February 5, 1991: US04990488 (3 worldwide citation)

Black crystal compositions having the empirical composition Bi.sub.a Sr.sub.b Cu.sub.c O.sub.d are described where a+b+c=1, A=0.36-0.557, b=0.098-0.496, c=0.1-0.4 and d=approximately 1+a/2. These compositions have a superconducting transition temperature T.sub.c for superconductivity of greater than ...