Composition based on cerium oxide or on cerium and zirconium oxides, in the extruded form, process for the preparation thereof and use thereof as catalyst

摘要

The present invention relates to a composition based on cerium oxide or on cerium and zirconium oxides, in the extruded form, to a process for the preparation thereof and to the use thereof as catalyst. The process for the preparation of the composition of the invention is characterized in that a cerium hydroxide or oxyhydroxide or cerium and zirconium hydroxides or oxyhydroxides are extruded. The composition of the invention can be used as catalyst or catalyst support, in particular in the treatment of exhaust gases from internal combustion engines, in the process for the dehydrogenation of ethylbenzene to styrene, in the catalysis of methanation or in the treatment of a solution or suspension of organic compounds by oxidation via a wet route.