| abstract |
Catalysts containing DOLLAR A a) 10 to 99.9% by weight of zirconium dioxide and / or titanium dioxide and DOLLAR A b) 0.1 to 30% by weight of silicon dioxide and DOLLAR A c) 0 to 60% by weight of aluminum oxide and DOLLAR A d) 0.1 to 10 wt .-% of at least one element of the first or second main group, an element of the third subgroup, an element of the eighth subgroup of the Periodic Table of the Elements and / or tin, DOLLAR A with the proviso that the sum of the percentages by weight is 100, a process for the dehydrogenation of C 2 to C 16 hydrocarbons and the use of these catalysts, and a process for the preparation of these catalysts. |