Daimler-benz Ag

Basf Aktiengesellschaft

Martina Heinau

Martin Hartweg

Leonhard Walz

Andrea Seibold

Thomas Fetzer

Bernd Morsbach

Wolfgang Buechele

Bernd Krutzsch

Walter Boegner

Brigitte Konrad

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.

Catalyst and process for its production

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 structure as a function of temperature.

Process for absorbing and desorbing nitrogen oxides in exhaust gases

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.

Zeolite-spinel catalyst for the reduction of nitrogen oxides and the

Growing community of inventors

Ulm, Germany

Martina Heinau