KATALYSATOR ZUM ENTALKYLIEREN VON ALKYLBENZOLEN

摘要

A catalyst for dealkylating alkyl benzenes and fractions of aromatized benzines by means of steam conversion is disclosed. The catalyst comprises rhodium or rhodium in a mixture with another noble metal from Group VIII of the Periodic System in an amount of 0.1 to 2 wt. % on a carrier of aluminum oxide and also at least one of the elements selected from the group consisting of sulfur, selenium or lead in an amount of 0.003 to 3 wt. %. To increase the yield of the final product, the catalyst also comprises at least one element selected from the group containing iron, cobalt, nickel, chrome, copper, and vanadium in an amount of 0.01 to 5 wt. %, and at least one of the elements of the alkaline or alkaline earth metals or mixtures thereof in an amount of 0.01 to 5 wt. %. The proposed catalyst features a high degree of selectivity for dealkylating alkyl benzenes in combination with a high degree of starting feed conversion.