From Borosilicate to Gallo- and Aluminosilicate Zeolites: New Methods for Lattice Substitution via Post-Synthetic Treatment

摘要

In this paper we report new methods for the lattice substitution of heteroatoms in large andrnextra-large pore borosilicate zeolites via post-synthetic treatment to prepare catalyticallyrnmore active zeolites. Ga-SSZ-33, Al-SSZ-33 and Al-UTD-1 prepared from B-SSZ-33 and BUTD-rn1, respectively, are discussed as examples. The materials are characterized with variousrnphysicochemical techniques and catalytic reactions. In particular, the advance of thesernmethods is demonstrated by the exceptionally high activity of the resulting Al-SSZ-33 forrnacid-catalyzed hydrocarbon conversions.