NEW CATALYSTS BASED ON ZEOLITES MODIFIED BY ALKALINE ELEMENTS IN METALLIC FORM, THEIR PREPARATION AND THEIR APPLICATION TO THE ALKYLATION OF ALKYL AROMATIC DERIVATIVES

摘要

Catalysts based on alumino-silicates or alkali Gallo-silicates with a faujasite structure, having an Si / Al or Si / Ga ratio of less than 1.5, wherein at least 10% of alkali metal cations are potassium, rubidium, and / or cesium characterized in that they contain as an additive of inclusions at least an alkali metal element in metallic form, their preparation and their use in alkylation reactions of alkylaromatic derivatives.