NOVEL ZEOLITH-BASED CATALYSTS MODIFIED BY ALKALINE ELEMENTS IN METALLIC FORM, THEIR PREPARATION AND THEIR APPLICATION TO THE ALKYLATION OF ALKYL-AROMATIC DERIVATIVES

摘要

P Catalysts based on aluminosilicates or alkaline gallosilicates of faujasite structure, having an Si / Al or Si / Ga ratio of less than 1.5, in which at least 10% of the alkali cations are potassium ions , rubidium and / or cesium, characterized in that they contain as additive inclusions of at least one alkaline element in metallic form; their preparation and their use in alkylation reactions of alkyl aromatic derivatives. /P