New Aluminosilicate and Titanosilicate Delaminated Materials Active for Acid Catalysis, and Oxidation Reactions Using H₂O₂

Abstract

A new material of zeolitic nature, ITQ-6, has been obtained by delamination of a layered precursor of ferrierite. XRD, Ar and N2 adsorption, and 29Si and 27Al MAS NMR pyridine and 2,6-di-tert-butylpyridine adsorption show that a delaminated material with a very high external surface area has been produced. The silicoaluminate is stable upon calcination and presents strong acid sites catalytically active and highly accessible to bulky reactants. We have also obtained by direct synthesis the titanium silicate version of the laminar precursor of ferrierite and ITQ-6. The Ti is demonstrated to be in framework positions, and in the case of the TiITQ-6 is active and selective in the epoxidation of 1-hexene with H2O2. The TiITQ-6 is stable and remains active upon repeated reaction−calcination processes.