The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2013
Filed:
Jul. 13, 2007
Ludivine Bouvier, Billere, FR;
Stephane Kieger, Sartrouville, FR;
Catherine Laroche, Vernaison, FR;
Philibert Leflaive, Mions, FR;
Dominique Plee, Lons, FR;
Ludivine Bouvier, Billere, FR;
Stephane Kieger, Sartrouville, FR;
Catherine Laroche, Vernaison, FR;
Philibert Leflaive, Mions, FR;
Dominique Plee, Lons, FR;
CECA S.A., La Garenne Colombes, FR;
IFP Energies Nouvelles, Rueil-Malmaison Cedex, FR;
Abstract
The present invention relates to agglomerated zeolitic adsorbents based on zeolite X with an Si/Al ratio such that 1.15<Si/AL<1.5, consisting of crystals with a mean diameter of 1.7 mm or less and of an inert binder, at least 90% of the exchangeable cationic sites of the zeolite X being occupied by barium ions. They may be obtained by agglomerating a zeolite X powder having a mean diameter of 1.7 mm or less with a binder, followed by zeolitization of the binder, exchange of the zeolite ions with barium (and potassium) ions and activation of the adsorbents thus exchanged. These adsorbents exhibit, simultaneously, excellent selectivity, reduced mass transfer resistance and excellent mechanical strength and are particularly suitable for the adsorption of the paraxylene contained in C8 aromatic hydrocarbon fractions in liquid phase in processes of the simulated moving bed type and especially for the separation of paraxylene of C8 aromatic hydrocarbon fractions by adsorption, but also for the separation of sugars, polyhydric alcohols, cresols, and substituted toluene isomers.