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Ti-beta zeolite was synthesized in the presence of sodium cations by a dry-gel conversion method using tetraethylammonium hydroxide as a structure-directing agent. As evidenced by diffuse reflectance UV spectroscopy, incorporated titianium species were tetrahedrally coordinated in the zeolites and neither anatase-like phase nor hexacoordinated titianium species belonging to an amorphous titanosilicate...
Ammoximation of cyclic ketones on TS-1 and amorphous SiO 2 –TiO 2 with H 2 O 2 and NH 3 was studied. The reactivity of cyclicketones over TS-1 and amorphous SiO 2 –TiO 2 showed the following order: cycloheptanone>cyclopentanone>cyclohexanone>cyclooctanone. Shape-selective poisoning studies revealed that the active sites of TS-1 for ammoximation...