Process for activating catalyst precursors for the dehydrogenation of C2- C5 paraffins, and a catalytic composition activated by the process

摘要

The process for activating a catalytic composition for paraffin dehydrogenation containing gallium, alumina, possibly silica and/or one or more alkaline or alkaline-earth metals, comprises thermal activation in air followed by post-activation effected by the following stages: PPoxidation with air and/or oxygen or a mixture containing oxygen and inert gas;PPpurging with inert gas; P Preduction with hydrogen or a mixture of hydrogen and an inert or reducing gas.PPThe catalytic composition activated by said process contains gallium, alumina, silica and possibly one or more alkaline or alkaline-earth metals, the alumina being in or phase or in + or ++ phase mixture.