Composition and Preparation Method of Rhenium- and Tungsten-Containing Porous Ceramic Converters Influence on the Cumene Dehydrogenation to α-Methylstyrene Process Specific Features

The latest research results on the specific features of the process of cumene dehydrogenation to alpha-methylstyrene (AMS) on the porous ceramic catalytic converters were presented. The influence of the method of formation of the mono- and bimetallic rhenium- and tungsten-based components on the activity and selectivity of the synthesized converters was evaluated. It was found that the monometallic tungsten-containing converter obtained by combining self-propagating high-temperature synthesis (SHS) with the sol-gel process has the optimal composition. The experiments showed that, for this converter, the temperature range of effective operation is 550-600 degrees C. In this range the space-time yield of AMS reached 14% at a maximum productivity of 20.57 g h(-1) dm(-3). The degree of carburization of the sample after 6 h of the experiment did not exceed 5 wt %, indicating its high resistance against coking.