Abstract
the influence of the content of titanium, the variety of the alkali and the amounts of the templates in the gels on the synthesis of the ts-1 zeolites prepared by means of tetrapropylammonium bromide (tpabr) as a template were investigated by h-1-->c-13 cp/mas nmr, si-29 mas nmr, ir, xrd and element analysis techniques. the results showed that the structures of the resultant ts-1 zeolites were transferred from monoclinic symmetry to orthorhombic symmetry with the increase of the titanium content in the framework. the added alkali didn't act as a template in the synthesis of ts-1 zeolites, but the strong alkali conditions were of benefit to the incorporation of the titanium atoms into the lattices. when the molar ratios of tpabr/sio2 in the gels varied from 0.05 to 0.25, the ti content in the framework showed independence of the amounts of tpabr in gels.
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