Process for dealuminization of the synthetic zeolites of large pores, catalysts and selective organophilic adsorbents containing the dealuminized zeolites obtained according to the process and essentially silicic beta zeolite
AssigneeSociete Nationale Elf Aquitaine
InventorsFrancois Fajula, Elodie Bourgeat-Lami, Catherine Zivkov, Thierry Des Courieres, Didier Anglerot
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Abstract
A process is provided for dealuminization of zeolites having large pores, the diameter of the aperture of the pores being greater than or equal to about 0.7 nm and the silica/alumina ratio greater than or equal to about 6. The process comprises acid leaching of the raw zeolite containing the structuring agent. The dealuminized zeolites obtained are useful as catalysts for the transformation of hydrocarbons and as selective organophilic adsorbents.
Claims21
A process for dealuminization of a synthetic zeolite having pores with the diameter of aperture of the channels of greater than or equal to about 0.7 nm and a silica/alumina ratio greater than or equal to about 6, which comprises subjecting said raw zeolite while containing the structuring agent, to acid leaching.
An essentially silicic beta zeolite, having a silica/alumina ratio of greater than or equal to about 800 and a crystallinity of greater than or equal to about 80%.
Dependencies are inferred from the claim text.