A New Aluminosilicate Molecular Sieve with a System of Pores between Those of ZSM-5 and Beta Zeolite

[EN] A new aluminosilicate zeolite (ITQ-39) has been synthesized. This is an extensively faulted structure with very small domains that makes the structure elucidation very difficult. However, a combination of adsorption spectroscopy and reactivity studies with selected probe molecules suggests that the pore structure of ITQ-39 is related to that of Beta zeolite, with a three-directional channel system with large pores (12-MR), but with an effective pore diameter between those of Beta and ZSM-5, or a three-directional channel system with interconnected large (12-MR) and medium pores (10-MR). The pore topology of ITQ-39 is very attractive for catalysis and shows excellent results for the preparation of cumene by alkylation of benzene, while it can be a promising additive for FCC.Financial support by the Spanish MICINN (MAT2009-14528-C02-01), Consolider Ingenio 2010-MULTICAT, Swedish Research Council (VR), the Swedish Governmental Agency for Innovation Systems (VINNOVA), and the Goran Gustafsson Foundation is gratefully acknowledged. Generalitat Valenciana is also thanked for funding through the Prometeo program. M.T.P. gratefully acknowledges CSIC for a JAE fellowship. The Knut and Alice Wallenberg Foundation for a grant for purchasing the TEMs used in this work is also thanked.Moliner Marin, M.; Gonzalez, J.; Portilla Ovejero, MT.; Willhammar, T.; Rey Garcia, F.; Llopis Alonso, FJ.; Zou, X.... (2011). A New Aluminosilicate Molecular Sieve with a System of Pores between Those of ZSM-5 and Beta Zeolite. Journal of the American Chemical Society. 133(24):9497-9505. https://doi.org/10.1021/ja2015394S949795051332