| abstract |
This refers to zeolitic adsorbents based on agglomerated crystals of EMT zeolite comprising barium and / or potassium. These adsorbents find applications in the separation of cuts of aromatic isomers in C₈ and particularly of the xylenes, in the separation of substituted toluene isomers such as nitrotoluene, diethyltoluene, toluenediamine, in the separation of cresols, and polyhydric alcohols, such as sugars Claim 12: Method of preparing an adsorbent according to any of the preceding claims, comprising at least the steps of: a) agglomeration of a zeolite powder comprising EMT zeolite, with a binder and put into shape, then drying and calcining, b) cationic exchange of the agglomerate by contacting with a solution of barium ions, or potassium ions, or of barium ions and potassium ions, c) Possible exchange with potassium, d) then washing and drying of the product so treated, and ) activation of the zeolitic adsorbent thus obtained. |