Abstract: Alkyl tert-alkyl ethers are cleaved into the corresponding isoolefins and alkanols by a process comprising acid-catalyzed reactive distilling an alkyl tert-alkyl ether fed into the reaction zone of a reactive distillation apparatus as an azeotrope of the alkyl tert-alkyl ether and the corresponding alkanol, wherein the reactive distillation apparatus is configured from bottom to top as a bottom zone, at least one distillation zone and a reaction zone. The process is suitable for the cleavage of primary, secondary and tertiary alkyl tert-alkyl ethers, in particular MTBE.

Abstract: A multilayer ornament, that is formed of a back of foam and a sheet of ornament, is brought on a support portion of the part, that it surrounds in the edge region. In a first step, the ornament is brought onto the part and is maintained in at least one edge region. Then, in a second step, the thickness of the foam is reduced by heating in the edge zone and/or stretching. And, in a third step, the ornament assembly or the projecting sheet of ornament is fixed onto at least one edge of the part.