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Synthesis of TS-1 from titanosilicate gels containing TPAOH/TEAOH and TPAOH/NH4OH mixtures

1993; Elsevier BV; Volume: 1; Issue: 3 Linguagem: Inglês

10.1016/0927-6513(93)80076-7

1873-3107

A. Tuel, Y. Ben Tâarit,

Chemical Synthesis and Characterization

Titanium silicates of the MFI type (TS-1) have been synthesized using mixtures of tetrapropylammonium (TPA) and tetraethylammonium (TEA) hydroxides. While TPAOH has revealed to be a real templating agent, this is not the case for TEAOH since it was not incorporated in the zeolite structure. Nevertheless, the presence of TEA considerably affects the crystallization of the gel by retarding the nucleation process and, therefore, the morphology of the zeolite crystals. Similar results are obtained with inorganic alkali-free bases such as NH4OH. Physicochemical characterizations show that both products, prepared either with TEAOH or NH4OH, are similar.