Evonik Operations Gmbh

Alexander Paasche

Christian Hying

Roland Krafczyk

Rolf-Walter Terwonne

Bastian Matthias Brugger

Oliver Conradi

Rupert Schnell

David Grzenia

Kira Khaletskaya

Hans-Jürgen Nettelnbreker

Christian Mani

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

Growing community of inventors

Haltern am See, Germany

Alexander Paasche