ZEOLITIC ADSORBENTS WITH LARGE EXTERNAL SURFACE AREA, PROCESS FOR PREPARING THEM AND USES THEREOF

摘要

The present invention relates to zeolitic adsorbents based on agglomerated crystals of FAU zeolite comprising barium and/or potassium, with large external surface area, combining optimum properties in terms of selectivity and mechanical strength.;These adsorbents find applications in the separation of cuts of C8-aromatic isomers and notably of xylenes, in the separation of isomers of substituted toluene such as nitrotoluene, diethyltoluene, toluenediamine, in the separation of cresols, and polyhydric alcohols, such as sugars.

主权项

1. A zeolitic adsorbent comprising at least one FAU zeolite and comprising at least one of barium or potassium, wherein the external surface area of said zeolitic adsorbent, measured by nitrogen adsorption, is greater than 20 m2·g−1.