Decationized, dealuminated and stabilized L zeolite and use thereof

摘要

The present invention concerns a new decationized, dealuminated and stabilized zeolite of L type, characterized particularly by:P Pa total SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of at least 8, PPa potassium content lower than 2.9% by weight,P Pparameters a and c of the elementary mesh respectively lower than 1. 836 nm and 0.754 nm,PPa nitrogen adsorption capacity at 77 K, for a partial pressure P/Ps of 0.19, higher than 11% by weight, PPa benzene adsorption capacity at 30° C., for a partial pressure P/Ps of 0.25, higher than 8.5% by weight, andP Pa lattice of mesopores whose radii, measured by nitrogen adsorption-desorption at 77 K according to the BJH method, range from 0.8 nm to 20 nm.