Evonik Operations Gmbh

Evonik Degussa Gmbh

Hans-Jürgen Nettelnbreker

Christian Hying

Arne Hoppe

Rolf-Walter Terwonne

Jürgen Steiger

Oliver Conradi

David Grzenia

Kira Khaletskaya

Alexander Paasche

Bastian Matthias Brugger

Adrian Drexler

Björn Niemann

Stephan Stolzenberg

The present invention provides a composite body having, on a porous substrate and in the interstices of the substrate that includes fibers, preferably of an electrically nonconductive material, a porous layer (1) composed of oxide particles bonded to one another and partly to the substrate that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from AlO, ZrO, TiOand SiO, and having, at least on one side, a further porous layer (2) including oxide particles bonded to one another and partly to layer (1) that include at least one oxide selected from oxides of the elements Al, Zr, Ti and Si, preferably selected from AlO, ZrO, TiOand SiO, where the oxide particles present in layer (1) have a greater median particle size than the oxide particles present in layer (2), which is characterized in that the median particle size (d) of the oxide particles in layer (1) is from 0.5 to 4 &#x3bc;m and the median particle size (d) of the oxide particles in layer (2) is from 0.015 to 0.15 &#x3bc;m, preferably 0.04 to 0.06 &#x3bc;m, a process for producing corresponding composite bodies and for the use thereof, especially in gas separation.

Composite body

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Haltern, Germany

Hans-Jürgen Nettelnbreker